Rashmi Cement Limited (Cement...
Transcript of Rashmi Cement Limited (Cement...
Rashmi Cement Limited (Cement Division) Proposed expansion of existing Cement Grinding Plant from 0.96 MTPA to 1.11 MTPA by enhancing capacity of 2000 TPD VRM base Grinding Units to 2500 TPD due to technical constraint at village – Boria, P.O – Garhsalboni, P.S – Jhargram, District: Paschim Medinipur, W.B.
PRE-FEASIBILTY REPORTS
FOR
EXPANSION OF EXISTING CEMENT GRINDING PLANT FROM 0.96 MTPA
TO 1.11 MTPA BY ENHANCING CAPACITY OF 2000 TPD VRM BASE
GRINDING UNITS TO 2500 TPD
AT
VILLAGE- BORIA, P.O – GARHSALBONI, P.S – JHARGRAM
DISTRICT – WEST MEDINIPUR, WEST BENGAL
Project Execution By
RASHMI CEMENT LIMITED (Cement Division)
PREMLATA BUILDING, 6thFLOOR
39, SHAKESPEARE SARANI, KOLKATA – 700 017
WEST BENGAL
Ph No.–033 – 22894255/56
Rashmi Cement Limited (Cement Division) Proposed expansion of existing Cement Grinding Plant from 0.96 MTPA to 1.11 MTPA by enhancing capacity of 2000 TPD VRM base Grinding Units to 2500 TPD due to technical constraint at village – Boria, P.O – Garhsalboni, P.S – Jhargram, District: Paschim Medinipur, W.B.
CONTENTS
Page No.
Chapter -1 -Executive Summary
1.1- Introduction 01
1.2- Present Project 02
1.3- Market Demand 03
1.4- Capital Cost 04
1.5- Project Schedule 05
Chapter -2 - Introduction of the Project
2.1- Identification of Project & Project Proponent 06
2.2- Brief Description of nature of the Project 07
2.3- Project Location 08
Chapter -3 – Technical Specification of VRM & its Comparison with Ball Mill
3.1 Introduction 11
3.2 Grinding System 13
3.3 Particle Size Distribution 14
3.4 Particle Size Consideration 18
3.5 Gypsum Dehydration Optimization 19
3.6 Final Remark 21
Chapter -4 – Techno Commercial Justification for Choosing 2500 TPD VRM
4.1 Process Concept 23
4.2 Sizing Norms 30
4.3 Cement Transport, Storage and Packing 31
4.4 Raw Material Requirement 32
4.5 Equipment Selection 33
4.6 Major Utility Facilities 39
4.7 Water Supply Facilities 41
Rashmi Cement Limited (Cement Division) Proposed expansion of existing Cement Grinding Plant from 0.96 MTPA to 1.11 MTPA by enhancing capacity of 2000 TPD VRM base Grinding Units to 2500 TPD due to technical constraint at village – Boria, P.O – Garhsalboni, P.S – Jhargram, District: Paschim Medinipur, W.B.
4.8 Manpower Requirement 44
4.9 Project Cost 44
4.10 Power Requirement 45
Chapter -5 – Site Analysis
5.1 Connectivity 46
5.2 Land form, Land use and Land Ownership 46
5.3 Topography (With Map) 46
5.4 Existing Infrastructure 47
5.5 Soil Classification 47
5.6 Climate Data from Secondary Sources 47
5.7 Social Infrastructure availability 48
Chapter -6 – Environment Management Plan
6.1 Solid Waste Management 49
6.2 Pollution Control Measures 50
6.3 Control Of Fugitive Emissions 53
6.4 Waste Generation & Treatment 53
6.5 Rain Water Harvesting 53
6.6 Storm Water Management 54
6.7 Land & Green Belt Development 55
6.8 Green Belt Development Plan 56
Chapter -7– Rehabilitation and Resettlement (R & R) Plan
7.1 Introduction 57
Chapter -8– Project Schedule & Cost Estimates
8.1 Detail 58
Chapter -9– Project Schedule & Cost Estimates
9.1 Financial and social benefits 59
Rashmi Cement Limited (Cement Division) Proposed expansion of existing Cement Grinding Plant from 0.96 MTPA to 1.11 MTPA by enhancing capacity of 2000 TPD VRM base Grinding Units to 2500 TPD due to technical constraint at village – Boria, P.O – Garhsalboni, P.S – Jhargram, District: Paschim Medinipur, W.B.
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Chapter -1 -Executive Summary
1.0 Introduction
Rashmi Cement Ltd. ( Cement Division), in Eastern India’s leading cement producer,
visualized the emerging market opportunities, had drawn up a plan to expand its
productive capacity in a phased manner during this current decade.
It is the 23 years old Flagship Company of the Rashmi Group in the State of West
Bengal for setting up cement and steel related plants at JANGAL MAHAL AREA and also
doing trading in mineral products having its Registered Office at Jhargram, West
Medinipur, West Bengal and Corporate Office address is Premlata Building, 6th Floor,
39-Shakespeare Sarani, Kolkata – 700 017, West Bengal. The company presently
comprises of two divisions- cement and Steel.
Rashmi Cement Ltd., a producers of OPC, PSC & PPC as per IS: 269:1989, IS 455:
2002 and IS 1489:1991(Part-I) in respectively. Cement production was started in
1992 with production capacity of 40,000 TPA and was expanded to 80,000 TPA in the
year 1993 and 1, 80,000 TPA in 1998. Subsequently company expanded the capacity
further 1, 80,000 TPA in 2008 and total capacity was 3, 60,000 TPA.
But, due to technological constraints the quality of cement produces from the old mills
(100 TPD, 100 TPD & 300 TPD) were not competitive for the rapidly growth markets. In
this respect management had dismantled the unit – I, II & III whose capacities were 100
TPD, 100 TPD and 300 TPD. Now, plant is successfully running only Ball Mill unit – IV
having capacity 600 TPD and total production capacity is 1,80,000 TPA.
The company has already obtained Environment Clearance on 27th May-2015, for
expansion of Cement Grinding Plant from 0.18 MTPA to 0.96 MTPA by adding 1x 600
Rashmi Cement Limited (Cement Division) Proposed expansion of existing Cement Grinding Plant from 0.96 MTPA to 1.11 MTPA by enhancing capacity of 2000 TPD VRM base Grinding Units to 2500 TPD due to technical constraint at village – Boria, P.O – Garhsalboni, P.S – Jhargram, District: Paschim Medinipur, W.B.
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TPD Ball Mill and 1x 2000 TPD Vertical Rolling Mill base Grinding Units by ‘Closed
Circuit Technology at village – Boria, P.O – Garhsalboni, P.S – Jhargram, District:
Paschim Medinipur, W.B. by the name of M/s Rashmi Cement Ltd. (Cement Division).
But while procuring the instruments & equipment for the proposed expansion, it is
found that the capacity of the VRM is standing 2500 TPD (Approx.) instead of 2000 TPD
and total production capacity (Existing(1X 600 TPD) + Proposed(1x 600 TPD Ball Mill + 1 x
2500 TPD VRM) will goes to 1.11 Million Tonnes Per Annum.
So, after proposed expansion, total capacity will be 1.11 Million Tonnes Per Annum.
1.1 Present Project
Proposed project is expansion/modernisation project, existing Cement grinding unit
capacity is 1, 80,000 TPA (Ball Mill Capacity: 600 TPD). The company has already
obtained Environment Clearance on 27th May-2015, for expansion of Cement Grinding
Plant from 0.18 MTPA to 0.96 MTPA by adding 1x 600 TPD Ball Mill and 1x 2000 TPD
Vertical Rolling Mill base Grinding Units.
But while procuring the instruments & equipment for the proposed expansion, it is
found that the capacity of the VRM is standing 2500 TPD (Approx.) instead of 2000 TPD
and total production capacity (Existing(1X 600 TPD) + Proposed(1x 600 TPD Ball Mill + 1 x
2500 TPD VRM) will goes to 1.11 Million Tonnes Per Annum at village – Boria, P.O-
GarhSalboni, P.S – Jhargram, District of Paschim Medinipur in West Bengal.
The technical detail about the VRM purchased:
Model No- MPS-3750 VRM
Power-1600 KW,986 RPM; 50Hz
Capacity- 200-250 Ton Per Hour
Grinding Track- 3.75 m Diameter
Rashmi Cement Limited (Cement Division) Proposed expansion of existing Cement Grinding Plant from 0.96 MTPA to 1.11 MTPA by enhancing capacity of 2000 TPD VRM base Grinding Units to 2500 TPD due to technical constraint at village – Boria, P.O – Garhsalboni, P.S – Jhargram, District: Paschim Medinipur, W.B.
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3 Rollers-2600 mm Diameter
Pfeiffer SLF-6700 Classifier
Flender Gear Box, KMP 530, 43.725:1
Vertical roller mill is widely used to solve the problem of pollution and fly ash disposal
problem. If we do the complete life cycle assessment of VRM technology, we will find
that VRM technology acts as an environmental safeguard/ eco friendly system as
compared to ball mill technology. The advantages of using Vertical Roller Mills:
1. Vertical Roller Mills use 30 % - 50 % less energy than Ball Mill system, therefore
acting as an environmental safeguard and reducing carbon footprint.
2. Simple layout and fewer machines in the Mill circuit high run-factor and low
maintenance costs, lower wear rate.
3. Excellent drying capability (approx. 20–25% more) when grinding Blast Furnace
Slag or blended cements with wet components.
4. Consistent Cement quality with easy to adjust quality parameters.
5. Special design features for iron removal during slag grinding wear.
6. Flexibility to operate with two or four rollers guarantees long term availability.
1.2 Market Demand
India is the second largest producer of cement in the world. No wonder, India's cement
industry is a vital part of its economy, providing employment to more than a million
people, directly or indirectly. Ever since it was deregulated in 1982, the Indian cement
industry has attracted huge investments, both from Indian as well as foreign investors.
India has a lot of potential for development in the infrastructure and construction
sector and the cement sector is expected to largely benefit from it. Some of the recent
major government initiatives such as development of 98 smart cities are expected to
provide a major boost to the sector.
Rashmi Cement Limited (Cement Division) Proposed expansion of existing Cement Grinding Plant from 0.96 MTPA to 1.11 MTPA by enhancing capacity of 2000 TPD VRM base Grinding Units to 2500 TPD due to technical constraint at village – Boria, P.O – Garhsalboni, P.S – Jhargram, District: Paschim Medinipur, W.B.
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Expecting such developments in the country and aided by suitable government foreign
policies, several foreign players have invested in the country in the recent past. A
significant factor which aids the growth of this sector is the ready availability of the raw
materials for making cement, such as limestone and coal.
India's cement demand is expected to reach 550-600 million tonnes per annum (MTPA)
by 2025. The housing sector is the biggest demand driver of cement, accounting for
about 67 per cent of the total consumption in India. The other major consumers of
cement include infrastructure at 13 per cent, commercial construction at 11 per cent
and industrial construction at nine per cent.
To meet the rise in demand, cement companies are expected to add 56 million tonnes
(MT) capacity over the next three years. The cement capacity in India may register a
growth of eight per cent by next year end to 395 MT from the current level of 366 MT. It
may increase further to 421 MT by the end of 2017. The country's per capita
consumption stands at around 190 kg.
Particularly, in the Eastern & North-East states, due a number of major infrastructure
projects planned by State/Central Governments and also rapid growth of industries,
the demand is likely to be higher than average for the country. Considering the
proximity of the project site to all major cities, Kolkata, Siliguri, Gantak, Bhubaneswar,
Patna, Ranchi, Jamshedpur etc. and neighbouring country Bangladesh, Nepal, Bhutan
and UAE’s etc. the growing demand can be met with less transportation costs of
cement.
1.3 CAPITAL COST
There will be around 30 lacs of additional cost going to be incurred while purchasing
the equipments and instrument in order to meet the technical specification. The earlier
Rashmi Cement Limited (Cement Division) Proposed expansion of existing Cement Grinding Plant from 0.96 MTPA to 1.11 MTPA by enhancing capacity of 2000 TPD VRM base Grinding Units to 2500 TPD due to technical constraint at village – Boria, P.O – Garhsalboni, P.S – Jhargram, District: Paschim Medinipur, W.B.
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project cost was 45 crores while obtaining EC – No.-1276/EN/T-II-I/044/2014; Dated
27/05/2015 for units (1x600 TPD Ball Mill + 1x2000 TPD VRM).
Now the project cost will stand 45 crores 30 lacs.
1.4 PROJECT SCHEDULE
This project would be designed by Capex Projects Management division of RASHMI
GROUP and will be executed by M/s Rashmi Cement Limited (Cement Division) project
division, which is located at Kolkata, West Bengal. As we have already obtained EC on
27th May-2015 for 1x 600 TPD Ball Mill & 1x 2000 TPD VRM based Cement Grinding
units and as already mentioned in the project feasibility report submitted for getting the
above mentioned EC, that the project is scheduled to be completed in phase wise 1st
Phase 1 unit of 600 TPD closed circuit Ball Mill will be completed within 10 months
from the starting date i.e. from the date of receiving all the statutory clearances and
another 2000 TPD closed circuit VRM will be completed depending on market, expected
within 60 months from the received of clearance. Now due to idue to some technical
constraint we are enhancing the capacity further from 0.96 MTPA to 1.11 MTPA by
upgrading 2000 TPD VRM to 2500 TPD Vertical Rolling Mill base Grinding Units. The
entire project will be completed within 60 months from the date of obtaining of
Environment Clearance & Consent to establish.
Rashmi Cement Limited (Cement Division) Proposed expansion of existing Cement Grinding Plant from 0.96 MTPA to 1.11 MTPA by enhancing capacity of 2000 TPD VRM base Grinding Units to 2500 TPD due to technical constraint at village – Boria, P.O – Garhsalboni, P.S – Jhargram, District: Paschim Medinipur, W.B.
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Chapter -2 - Introduction of the Project
2.1 Identification of Project and Project Proponent
Rashmi Cement Limited (Cement Division) is one of the largest producers of cement
in the Eastern region of the country having its registered office at Premlata Building, 6th
Floor, 39-Shakespeare Sarani, Kolkata – 700 017 in West Bengal. Rashmi Cement Ltd.,
a producers of OPC, PSC & PPC as per IS: 269:1989, IS 455: 2002 and IS
1489:1991(Part-I) in respectively. Cement production was started in 1992 with
production capacity of 40,000 TPA and was expanded to 80,000 TPA in the year 1993
and 1, 80,000 TPA in 1998. Subsequently company expanded the capacity further to 1,
80,000 TPA in 2008 and making total production capacity to 3, 60,000 TPA. But, due to
technological constraints management had dismantled the unit – I, II & III whose
capacities were 100 TPD, 100 TPD and 300 TPD. As on date RCL is successfully
running only Ball Mill unit – IV having capacity 600 TPD and total production capacity
at present is 1,80,000 TPA.
Rashmi Group of companies is a fast growing Group in the field of manufacturing steel
and cement. The company has developed core competence in minerals, steel and
cement with 40 years of experience. The Group’s turnover is around Rs.3000.0 Crores
and net worth is Rs.1200.0 Crores. Rashmi Group awarded ‘Ultra Mega Project’ status
by Govt. of West Bengal. The Group is also engaged in import/export of Mineral &
Mineral based products. The growth of the group during last few years has been
phenomenal and fast catching the attention of bankers, professionals and industry as a
whole.
Rashmi Group founded in 1966 really got impetus from its real promoter, a true
visionary, Sri. Sajjan Kumar Patwari. The group has grown from merely a re-rolling
mill to a fully fledged Cement Crushing Plant having overall capcity 0.96 MTPA after
Rashmi Cement Limited (Cement Division) Proposed expansion of existing Cement Grinding Plant from 0.96 MTPA to 1.11 MTPA by enhancing capacity of 2000 TPD VRM base Grinding Units to 2500 TPD due to technical constraint at village – Boria, P.O – Garhsalboni, P.S – Jhargram, District: Paschim Medinipur, W.B.
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getting statutory clearance at Jhargram in West Bengal. In addition to this, the Group
also has a Sponge Iron Plant with a capacity of 4 lakhs, Ferro alloy with capacity 24
thousands TPA at Jhargram, 28 MW Captive Power Plant and Integrated steel Plant of 5
lakh TPA along with captive Power plant 28 MW at Kharagpur in West Bengal. Rashmi
Group is presently in the process of capacity addition in backward/forward Integration
to achieve the ultimate capacity of 2 million TPA at Kharagpur. The Group is setting up
another 1.0 million TPA Steel Plant and 200 MW power plants at Jamuria, Dist.-
Burdwan in West Bengal, for this MoEF, Delhi already issued the Environmental
Clearance.
On 27th May-2015, RCL got Environment Clearance for expansion of Cement Grinding
Plant from 0.18 MTPA to 0.96 MTPA by adding 1x 600 TPD Ball Mill and 1x 2000 TPD
Vertical Rolling Mill base Grinding Units by ‘Closed Circuit Technology at village –
Boria, P.O – Garhsalboni, P.S – Jhargram, District: Paschim Medinipur, W.B.
Now, due to some technical constraint at the time of purchase of the instruments &
equipment for the proposed expansion, it is found that the capacity of the VRM is
standing 2500 TPD (Approx.) instead of 2000 TPD, therefore we are expanding the
capacity of Cement Grinding Plant from 0.96 MTPA to 1.11 MTPA.
2.2 Brief Description of nature of Project
The project under study in this report is to enhance the capacity of the VRM base
Cement Grinding unit from 2000 TPD to 2500 TPD , due to technical constraint at the
time of purchase of the instruments & equipment for the of expansion of Cement
Grinding Plant from 0.18 MTPA to 0.96 MTPA by adding 1x 600 TPD Ball Mill and 1x
2000 TPD Vertical Rolling Mill base Grinding Units by ‘Closed Circuit Technology, for
which EC is already obtained from your department vide EC – No.-1276/EN/T-II-
I/044/2014; Dated: 27/05/2015.But at the time of procurement it was found that VRM
Rashmi Cement Limited (Cement Division) Proposed expansion of existing Cement Grinding Plant from 0.96 MTPA to 1.11 MTPA by enhancing capacity of 2000 TPD VRM base Grinding Units to 2500 TPD due to technical constraint at village – Boria, P.O – Garhsalboni, P.S – Jhargram, District: Paschim Medinipur, W.B.
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capacity is standing 2500 TPD (Approx.) instead of 2000 TPD and total production
capacity (Existing (1X 600 TPD) + Proposed (1x 600 TPD Ball Mill + 1 x 2500 TPD
VRM) will goes to 1.11 Million Tonnes Per Annum at village – Boria, P.O-
GarhSalboni, P.S – Jhargram, District of Paschim Medinipur in West Bengal. This
project is for expansion of cement grinding capacity for 0.96 MTPA to 1.11 MTPA.
2.3 Project Location
The proposed expansion of cement grinding unit is located at Village – Boria, P.O –
Garhsalboni, P.S – Jhargram, District – Paschim Medinipur, state of West Bengal.
The proposed site is situated about 8 km to the south of NH-6 and the nearest railway
station is at Jhargram 10 km away from the site. The proposed site is about 125 km
from the capital city of Kolkata, about 50 km from the Kharagpur railway station and
80 km from the Haldia Port. Kharagpur, an important Junction of the South-Eastern
Railway is located centrally in the district. It provides connectivity to all parts of the
country for passengers as well as goods. The geographical location of this site is
Longitude 22023’30.82’’N & Latitude 8700’58.15 E.
It is situated at an altitude of 80 m (265 ft) above the mean sea level. The general slope
of the district is towards east and south east in direction. The proposed site is
surrounded by industries like Rashmi Cement Ltd. (Steel & Power Div.), Rashmi Ispat
Ltd., Unitech Paper Mill, Kanak Durga Rice Mill, Sitala Rice Mill, Printex Textile Dye
etc.
Rashmi Cement Limited (Cement Division) Proposed expansion of existing Cement Grinding Plant from 0.96 MTPA to 1.11 MTPA by enhancing capacity of 2000 TPD VRM base Grinding Units to 2500 TPD due to technical constraint at village – Boria, P.O – Garhsalboni, P.S – Jhargram, District: Paschim Medinipur, W.B.
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District wise State Map of West Bengal Jhargram District Map
Location Map for the proposed project
Rashmi Cement Limited (Cement Division) Proposed expansion of existing Cement Grinding Plant from 0.96 MTPA to 1.11 MTPA by enhancing capacity of 2000 TPD VRM base Grinding Units to 2500 TPD due to technical constraint at village – Boria, P.O – Garhsalboni, P.S – Jhargram, District: Paschim Medinipur, W.B.
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Fig2. Satellite photography for proposed project plant Location at Vil. – Boria,
P.O- Garhsalboni, P.S – Jhargram, District of Paschim Medinipur
N
N
Rashmi Cement Limited (Cement Division) Proposed expansion of existing Cement Grinding Plant from 0.96 MTPA to 1.11 MTPA by enhancing capacity of 2000 TPD VRM base Grinding Units to 2500 TPD due to technical constraint at village – Boria, P.O – Garhsalboni, P.S – Jhargram, District: Paschim Medinipur, W.B.
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Chapter -3 – Technical Specification of VRM & its Comparison with Ball Mill
3.1 Introduction
Cement production typically requires the grinding of three separate types of material
during the process:
The raw materials
Coal before the kiln, and
The final cement product
Once firing is complete and the clinker cooled. Looking back on a century or more, ball
mill systems were used for all three grinding stages, but the development of more
energy- efficient vertical roller mills (VRMs) led to their replacement. Initially, this
focused on grinding coal and the cement raw materials, with the adoption of vertical
roller mills for cement product grinding – with its finer grinding requirements – coming
more recently, in the late 1990s.
The main reason for the delay in uptake of VRM technology for cement grinding was
the concerns of producers that their product qualities would not meet market
requirements, specifically in three key areas:
Water demand
Strength development and
Setting times.
Over the past 15 years, however, it could be demonstrated that these concerns are
unfounded, and that the quality of cement obtained from VRM grinding is as good as,
or in some cases better than, that produced in a ball mill. In consequence, most of the
world’s major cement producers now use vertical roller mills for cement grinding.
There is no question that vertical roller mills offer significant advantages over ball mills
in terms of their energy efficiency. As noted in a current publication (1) the specific
power consumption of a ball mill is higher than that of a vertical roller mill (VRM)
Rashmi Cement Limited (Cement Division) Proposed expansion of existing Cement Grinding Plant from 0.96 MTPA to 1.11 MTPA by enhancing capacity of 2000 TPD VRM base Grinding Units to 2500 TPD due to technical constraint at village – Boria, P.O – Garhsalboni, P.S – Jhargram, District: Paschim Medinipur, W.B.
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carrying out the same operations by a factor of between 1.5 and 2, depending on the
degree of optimization of the ball mill. Fig. 1 illustrates this connection, as well as
showing the increasing energy benefit that can be obtained with a vertical roller mill as
the specific Blaine surface area rises.
Fundamentally, ball mills use proportionately more to produce a finer ground product
than do VRMs, and the energy consumption in a VRM obviously does increase with
product fineness; it does so much less rapidly. Indeed, while the difference in energy
efficiency is significant when a VRM is used for grinding OPC, the energy benefit is even
greater in the case of blast furnace slag which is hard to grind, as can be seen in
Figure 2.
Rashmi Cement Limited (Cement Division) Proposed expansion of existing Cement Grinding Plant from 0.96 MTPA to 1.11 MTPA by enhancing capacity of 2000 TPD VRM base Grinding Units to 2500 TPD due to technical constraint at village – Boria, P.O – Garhsalboni, P.S – Jhargram, District: Paschim Medinipur, W.B.
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3.2 Grinding System
Today cement producers have the option for using a range of different systems for
cement grinding. A comprehensive list of all the available options would certainly
include traditional ball-mill systems, high-pressure grinding rolls in every kind of
design types and their various combinations with ball mills and, of course, VRMs
vertical roller mills. All of these systems treat the material to be ground differently, in
that the actual grinding needed to achieve the desired characteristics varies from one to
the other. Fig. 3 illustrates schematically some possible alternative flow-sheets using
VRM’s and ball mill.
With the focus here being on ball mills and VRMs, Table 1 shows some comparative
performance parameters for the two systems when used for grinding cement. It has to
be remembered that there are major differences in the mechanism of grinding between
VRMs and ball mills, in terms of how grinding occurs, the residence time, the level of
repeat grinding and recirculation factors, among others.
In a VRM, comminution occurs by pressure and shear forces that are introduced via
the grinding rollers. In ball mills, comminution is mainly done by impact, with the
grinding balls being lifted up by the rotating shell, and then dropped back onto the
charge and other balls. There is some attrition as well.
There is also a major difference in terms of the average residence time – the time the
Rashmi Cement Limited (Cement Division) Proposed expansion of existing Cement Grinding Plant from 0.96 MTPA to 1.11 MTPA by enhancing capacity of 2000 TPD VRM base Grinding Units to 2500 TPD due to technical constraint at village – Boria, P.O – Garhsalboni, P.S – Jhargram, District: Paschim Medinipur, W.B.
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material particles remain in the mill system before they leave the classifier as product.
Including both grinding in the mill body and a circulation factor, the residence time for
a VRM is less than one minute, while particles can remain within a ball mill system for
20 to 30 minutes. Individual cement particles will be ground from one to three times in
a VRM before being offered to the classifier, whereas repeat grinding in a ball mill is
virtually uncountable because of the grinding mechanism. Finally, while a ball will have
a recirculation factor of 2 to 3, this increases between 6 to 20 for a VRM, depending on
the pressure, height, the grinding tools configuration, the grindability of the material
and the required product fineness. The differences in all of these parameters are shown
in Table 1.
3.3 Particle Size Distribution
The particle size distribution of cement is usually plotted on the well known RRSB-
diagram. Fig. 4 shows size distribution curves for cements produced by grinding in
VRMs and in ball mills. The inclination of each curve, the slope ‘n’, is measured at the
positioning parameter that represents the particle diameter at which the residue, in
terms of mass, is 36.8 %. A higher ‘n-’value produces a steeper curve, whereas the
lower the slope, the more fine and over-ground particles are in the finished product at a
constant Blaine value, measured in cm2 /g.
Figure-4 shows that in this case, ‘n’ for the VRM cement system is steeper than for
Rashmi Cement Limited (Cement Division) Proposed expansion of existing Cement Grinding Plant from 0.96 MTPA to 1.11 MTPA by enhancing capacity of 2000 TPD VRM base Grinding Units to 2500 TPD due to technical constraint at village – Boria, P.O – Garhsalboni, P.S – Jhargram, District: Paschim Medinipur, W.B.
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cement produced in a ball mill. This is caused by the higher proportion of fine (over-
ground) material present in the ball mill cement, which in turn reflects the greater
number of impacts and the inherent inefficiency of ball mill grinding.
The question then has to be asked as to the reason for the different slopes in the
particle size distribution diagrams. Firstly, and as explained above, the different
grinding behaviour of the vertical roller and ball mill systems means that particles
remain in a ball mill system for about 20 to 30 minutes before they leave the classifier
as product. They are impacted repeatedly during that time, with the result that some
particles are ground more than necessary. By contrast, the limited amount of grinding
for each particle in the VRM system before classification avoids any unnecessary over-
grinding.
If a similar product to one from an existing ball mill system is needed, however, the
VRM can be adjusted to achieve this. As shown in Figure-5, adjustments can be made
to the grinding pressure, the dam ring height, the mill airflow, the classifier rotor speed
and, for cements with a very high Blaine value, the table speed. Figure-6 shows the
Rashmi Cement Limited (Cement Division) Proposed expansion of existing Cement Grinding Plant from 0.96 MTPA to 1.11 MTPA by enhancing capacity of 2000 TPD VRM base Grinding Units to 2500 TPD due to technical constraint at village – Boria, P.O – Garhsalboni, P.S – Jhargram, District: Paschim Medinipur, W.B.
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effects on the slope of the particle size distribution curve by adjusting each of these
parameters.
A higher grinding pressure will result in more intense grinding with the development of
more fine material, and hence a shallower particle size distribution. The higher the dam
Rashmi Cement Limited (Cement Division) Proposed expansion of existing Cement Grinding Plant from 0.96 MTPA to 1.11 MTPA by enhancing capacity of 2000 TPD VRM base Grinding Units to 2500 TPD due to technical constraint at village – Boria, P.O – Garhsalboni, P.S – Jhargram, District: Paschim Medinipur, W.B.
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ring, the longer the material remains on the grinding table, and the more it is ground in
one cycle. This again results in the generation of more fines, and a shallower particle
size distribution. In addition, the airflow and the classifier settings can be adjusted in
order to produce the desired product characteristics.
Test work carried out in 2009 at the Vicat group’s Montalieu plant in France has proved
conclusively that these adjustments will deliver the required results. The study involved
grinding the same cement once in a closed-circuit ball mill system and once in a
grinding plant with a VRM Mill. Figure-7 shows some results from the project,
confirming that the positioning parameter, the slope of the particle size distribution and
the product fineness of both cements are in exactly the same range. Furthermore, the
water demand for both cements needed to create a cement paste with a standard
consistency are the same, reflecting the same slope ‘n’, positioning parameter and
Blaine values. This test work proved in a practical way that there is no difference in
material properties due to the differing grinding mechanisms.
Rashmi Cement Limited (Cement Division) Proposed expansion of existing Cement Grinding Plant from 0.96 MTPA to 1.11 MTPA by enhancing capacity of 2000 TPD VRM base Grinding Units to 2500 TPD due to technical constraint at village – Boria, P.O – Garhsalboni, P.S – Jhargram, District: Paschim Medinipur, W.B.
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3.4 Particle Shape Consideration
Differences in particle shape have been another area in which vertical roller mill
systems have been the subject of scrutiny. The suggestion was made that cement
particles coming out of a ball mill are always much rounder then those coming out of a
VRM, which are more shallow and elongated. This again, together with fewer fine
particles, would result in increased water demand for the cement paste.
The roundness or circularity of the particles can be determined by optical methods
such as image analyses. Within those measurements, particle shapes are described
with values of between 1 and 0. A value of 1 indicates a particle that is perfectly
spherical, and as the value approaches 0, it indicates an increasingly elongated,
shallow polygon.
Figure- 8 illustrates the particle size distribution of a cement with a product fineness of
about 4 100 g/cm acc. to Blaine. This shows that the size of the smallest particle is
about 0.1 µm and the size of the largest particle is about 52 µm for this particular
cement. In general, while a wide variety of the cements are ground to different
finenesses, the largest particles are usually between 45 and 55 µm.
In addition, 95 % of all the cement particles are below 45 µm in size, again depending
on the final product fineness and slope of the particle size distribution curve.
Rashmi Cement Limited (Cement Division) Proposed expansion of existing Cement Grinding Plant from 0.96 MTPA to 1.11 MTPA by enhancing capacity of 2000 TPD VRM base Grinding Units to 2500 TPD due to technical constraint at village – Boria, P.O – Garhsalboni, P.S – Jhargram, District: Paschim Medinipur, W.B.
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Test-work undertaken by the VDZ in its role as Germany’s Cement Research Institute
compared the particle shapes produced in different types of milling systems. Figure- 9
shows a plot of the shapes of cement particles from high-pressure grinding rolls, ball
mills and vertical roller mills, with the particle size being shown on the x-axis and the
circularity on they-axis [2].
It is clear from this plot that there is no significant difference in particle shape between
the cements produced in all three of these mill types, apart from at a particle size of
around 58 µm, where the shapes begin to differ. However, this particle size rarely
occurs in most types of cement, and where it does, it only appears in such small
proportions that there is no severe influence on the water demand, strength
development or other issues.
3.5 Gypsum dehydration Optimization
Gypsum is mainly added to cement to act as setting regulator, with the precise amount
and type of gypsum chosen in relation to its solubility and the individual clinker. A
producer will work out the correct proportion and type of sulphate to be used through
Rashmi Cement Limited (Cement Division) Proposed expansion of existing Cement Grinding Plant from 0.96 MTPA to 1.11 MTPA by enhancing capacity of 2000 TPD VRM base Grinding Units to 2500 TPD due to technical constraint at village – Boria, P.O – Garhsalboni, P.S – Jhargram, District: Paschim Medinipur, W.B.
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product optimization in order to fulfil optimal requirements
The energy input into the mill and the hot gases will heat the cement, with the gypsum
being partially dried and converted to hemihydrate, so-called bassanite or plaster.
Mixed together with water, hemihydrate dissolves better than gypsum, so the dilution is
more reactive in regulating the cement set. Partial dehydration is intended within the
milling process, but if it exceeds or under runs a certain value, it can result in
accelerated setting behaviour. This in turn can lead to problems such as with the
workability of the cement paste.
As the retention time in ball mills is 20 to 30 times greater than in vertical roller mills,
the cement is exposed to the hot- gas atmosphere for much longer. In addition, ball
mills use much more energy than vertical roller mills in order to grind the same amount
of cement, with this additional energy heating the material even further. Because of
this, the particle temperatures at the exit from ball mills operated with-out water
cooling are usually about 30 °C higher than those experienced with vertical roller mills.
Therefore, if the same cement recipe is ground in both mills, paste from cement ground
in a vertical roller mill will exhibit different setting behaviour and strength development
during hardening. This is because the gypsum is dried more intensively in a ball mill
system, resulting in the formation of more hemihydrate and hence higher sulphate
solubility.
Of course, commissioning any new mill requires the system to be optimized, including
adjusting the amounts of gypsum and the other additives needed to achieve the
required setting and strengthening behaviour. The same applies when changing from a
ball mill system to a vertical roller mill system, when the operator needs to increase
slightly the amount of gypsum put into the cement, or substitutes the gypsum to
increase the solubility by hemihydrate or anhydrite.
Other optimization measures include increasing the mill exit temperature and/or
Rashmi Cement Limited (Cement Division) Proposed expansion of existing Cement Grinding Plant from 0.96 MTPA to 1.11 MTPA by enhancing capacity of 2000 TPD VRM base Grinding Units to 2500 TPD due to technical constraint at village – Boria, P.O – Garhsalboni, P.S – Jhargram, District: Paschim Medinipur, W.B.
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reducing the moisture content of the mill gas flow, both of which will enhance the
drying process of the added gypsum. As summarized in Figure-10 these are standard
process optimization procedures that can also be used to ensure that the cements
produced in vertical roller mills have comparable setting times and compressive
strength development to those from ball mills. Because it is partly true that cement
produced in a vertical roller mill has lower gypsum dehydration, this can be adjusted
through standard process optimization.
3.6 Final Remark Table-2 presents a summary of the results obtained from the comparative milling tests
at the Montalieu plant in France. While key features include the very similar particle
size distribution, positioning parameter and the fineness acc. to Blaine, the results
show that the setting times for the two cements are the same. Setting begins after
about 125 minutes and stops – in both cases – after 175 minutes. In addition, the
compressive strength and the strength development measured after 2, 7 and 28 days
are basically exactly the same.
This proves that cements produced in a ball mill or in a vertical roller mill can have the
Rashmi Cement Limited (Cement Division) Proposed expansion of existing Cement Grinding Plant from 0.96 MTPA to 1.11 MTPA by enhancing capacity of 2000 TPD VRM base Grinding Units to 2500 TPD due to technical constraint at village – Boria, P.O – Garhsalboni, P.S – Jhargram, District: Paschim Medinipur, W.B.
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same characteristics and qualities when required to do so by local markets, particularly
in terms of the water demand of the cement paste, the setting times, the compressive
strengths and strength developments of mortars.
Indeed, the flexibility of this mill system is such that today there are several mills used
to grind five or six cement product. Cement producers worldwide appreciate the higher
energy efficiency of the vertical roller mill. In addition, the inherent flexibility of this mill
system means that the product specification can be changed quickly and easily in
contrast to ball mill.
Rashmi Cement Limited (Cement Division) Proposed expansion of existing Cement Grinding Plant from 0.96 MTPA to 1.11 MTPA by enhancing capacity of 2000 TPD VRM base Grinding Units to 2500 TPD due to technical constraint at village – Boria, P.O – Garhsalboni, P.S – Jhargram, District: Paschim Medinipur, W.B.
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Chapter -4 – Techno-Commercial Justification for choosing 2500 TPD VRM
4.1 Process Concept
With the continual increasing demand for Portland cement and constant pressure for
reduced energy consumption, producers are exploring a wide variety of cost-saving
manufacturing options. One option is vertical roller mill technology for finish grinding.
Traditionally, plants used ball mills to grind clinker and gypsum into cement. The
result: the majority (60%) of finish grinding in the world is still performed using the
ubiquitous ball mill. Ball mills are cylindrical steel shells with steel liners.
These rotating drums contain grinding media that tumble inside the cylinder. The
grinding balls cascade and tumble onto the clinker and gypsum to produce cement.
Almost all ball mills use a form of closed circuit grinding that returns material that is
too coarse back to the ball mill inlet while material fine enough to meet product
requirements is collected. The separator or classifier determines which particles will be
returned and which particles are sufficiently fine. With an effort to increase production,
ball mill physical size has increased almost to the physical limitation dictated by the
gas velocities and accompanying pressures necessary for the process. Ball mills may
not be the most efficient means of size reduction but their reputation for product
consistency and their simplicity of operation have made them an historic plant favorite.
Since the 1980’s, cement plants are increasingly looking to vertical roller mill
technology for their finish grinding needs. Vertical roller mills present a compact and
efficient grinding method. Clinker and gypsum is ground on a rotating table that passes
under large rollers. Material is forced off the table by centrifugal force, where it is then
swept up into an airstream to a classifier immediately above. Just as with a ball mill,
material that is too coarse is returned to the table for additional grinding while material
that is fine enough is collected as product. The compact design of a vertical roller mill
Rashmi Cement Limited (Cement Division) Proposed expansion of existing Cement Grinding Plant from 0.96 MTPA to 1.11 MTPA by enhancing capacity of 2000 TPD VRM base Grinding Units to 2500 TPD due to technical constraint at village – Boria, P.O – Garhsalboni, P.S – Jhargram, District: Paschim Medinipur, W.B.
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allows it to dry, grind, and classify, all within one piece of equipment and all in a
relatively compact space. Vertical roller mill technology allows:
1. Dust collecting efficiency and
2. Ash removal efficiency,
3. Simplify the technological process, extend the service life of fan.
Vertical Roller mill discharge equipment recycling through ascension, which make the
system to further reduce energy consumption and the labor intensity of operators, a big
drop in truly achieve the goal of saving energy and reducing consumption. At present,
the circulation outside the band level of dust collecting technology has become a
vertical mill technology application the mainstream technology of choice.
Advantages of using Vertical Roller Mills:
1. Vertical Roller Mills use 30 % - 50 % less energy than Ball Mill system.
2. Simple layout and fewer machines in the Mill circuit high run-factor and low
maintenance costs.
3. Excellent drying capability when grinding Blast Furnace Slag or blended cements
with wet components.
4. Consistent Cement quality with easy to adjust quality parameters.
5. Special design features for iron removal during slag grinding wear.
6. Flexibility to operate with two or four rollers guarantees long term availability
By changing various vertical roller mill operating parameters, significant adjustments in
the particle size distribution, retention time, and fineness of the finished cement can be
achieved. This can help with plant operations as production is switched between
different cement types.
Rashmi Cement Limited (Cement Division) Proposed expansion of existing Cement Grinding Plant from 0.96 MTPA to 1.11 MTPA by enhancing capacity of 2000 TPD VRM base Grinding Units to 2500 TPD due to technical constraint at village – Boria, P.O – Garhsalboni, P.S – Jhargram, District: Paschim Medinipur, W.B.
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In light of these issues, vertical roller mills are becoming a popular choice for both
existing ball mill conversion and new mill construction. From 2000-2002, 56% of the
mill orders (comprising both raw mills and finish mills) came from vertical mills –
compared to 32% for ball mills. Clearly vertical roller mills are an increasingly attractive
option for improving production, lowering energy costs, and maintaining product
quality.
Figure 4.1-Vertical Roller Mill for Clinker Grinding
4.1.1 Raw Material Grinding
Raw material grinding has the objective of producing a homogenous raw meal from a
number of components that are sometimes variable in themselves. The feed moisture
contents are generally between 3 and 8 %, but sometimes also over 20% by weight.
Fineness requirements are usually <10% to 15% residue on the 90 µm screen (<1–2%
residue on the 200 µm screen) with feed particle sizes of 100-200 mm. Vertical mills
were installed in 80% of all new grinding plants, after 84% in the preceding period of
time. The advantage of vertical mills is their relatively low power consumption and the
Rashmi Cement Limited (Cement Division) Proposed expansion of existing Cement Grinding Plant from 0.96 MTPA to 1.11 MTPA by enhancing capacity of 2000 TPD VRM base Grinding Units to 2500 TPD due to technical constraint at village – Boria, P.O – Garhsalboni, P.S – Jhargram, District: Paschim Medinipur, W.B.
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simultaneous grinding, drying and separation in the mill itself, together with a wide
mass flow control range of 30–100%. This mill type achieves a specific power
requirement of below 10kWh/t at medium raw material hardness and a medium
product fineness of 12% R 0.09 mm.
The increasing through put rates of vertical mills kept pace with the rise in kiln line
capacities. Large vertical mills with several independent grinding rollers allow grinding
operation to be maintained even if one roller or one pair of opposite rollers fails, so that
at least partial-load operation of the kiln line is possible. Ball mills are still used in 12-
13% of all raw material grinding applications, such as the grinding of dry or abrasive
raw materials.
However, the development potential of ball mills seems to be exhausted, even though
some new concepts are under investigation, such as ball mills with a conical housing
and mills with variable L/D ratios. Although roller presses have so far generally been
used in combination processes with ball mills, they have gained significance for the
finish grinding process in recent years, partly due to new developments. Horizontal
mills have so far little been able establish themselves in raw material grinding. The
growing success of roller presses is primarily due to improved separator concepts.
Such a system for raw material grinding consists of one or two parallel roller presses, a
downstream static V-Separator and a preceding high-efficiency separator. The two
separators are connected by a pneumatic conveyor. In the V-Separator, the material is
dried and the coarse fraction is removed. The coarse material is then returned via a
bucket elevator to the mill feed system for regrinding together with the fresh feed
material.
Rashmi Cement Limited (Cement Division) Proposed expansion of existing Cement Grinding Plant from 0.96 MTPA to 1.11 MTPA by enhancing capacity of 2000 TPD VRM base Grinding Units to 2500 TPD due to technical constraint at village – Boria, P.O – Garhsalboni, P.S – Jhargram, District: Paschim Medinipur, W.B.
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The fine material passes to the separator for finished product collection. Oversize
material is also returned from there to the roller press. Throughput rates of up to 1000
TPH can be achieved with this type of system.
4.1.2 Clinker/Cement Grinding
For cement grinding, normal mill capacities are between 100 and 200 TPH. Mill
capacities depend greatly on the grind ability of the clinker and of the inter grinding
material, such as slag or limestone, as well as on the required cement fineness. The mill
output decreases in line with increasing product fineness.
The market shares of roller presses and horizontal mills have declined slightly. In view
of the poor energy utilization of ball mills, one may wonder why they still account for
almost half of all ordered cement mills.
The reasons for this are complex. Firstly, ball mills are used in combination grinding
systems and finish grinding systems because they are held in high regard due to easy
operation and high availability.
Secondly, conversions to high-efficiency separators in closed circuits are often
undertaken, often involving the purchasing of replacement ball mills or the
modernization of existing ball mills. Sometimes, ball mills are purchased as stand-by
mills for vertical mills.
In recent years, a number of developments have dealt with the improvement and
optimization of ball mills. Such efforts are prompted by the fact that ball mills are still
widely used and by the increasing specific grinding costs.
One significant field is improvement of the grinding ball grading, which can reduce the
energy requirement by around 10 %. Specific material transfer diaphragms and
Rashmi Cement Limited (Cement Division) Proposed expansion of existing Cement Grinding Plant from 0.96 MTPA to 1.11 MTPA by enhancing capacity of 2000 TPD VRM base Grinding Units to 2500 TPD due to technical constraint at village – Boria, P.O – Garhsalboni, P.S – Jhargram, District: Paschim Medinipur, W.B.
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discharge diaphragms with material flow regulation bring a significant additional
improvement. Modern noise sensors on the rotating mill shell can accurately measure
the filling levels of the first and second grinding compartments independently of each
other.
The quality characteristics of cements from grinding machines other than the ball mill
are no longer regarded as negative.
The application of vertical mills for cement grinding is currently regarded as a real
technological breakthrough. However, this does not refer to so-called pre grinders, but
to vertical mills with integral separators that are used for finish grinding.
All vertical mills provide the advantage of quick product type changeover because the
short material residence times in the mill enable the attainment of quality and capacity
parameters just a short time after a changeover, without having to stop the grinding
operation. On the other hand, it should not be forgotten that the grinding conditions
(grinding speed, grinding pressure, water injection, grinding aids etc.) have to be
optimized for each different mill feed material. Also, the height of the dam ring on the
grinding table can only be optimally adjusted for one single product, or else
compromises have to be made. During operation, the grinding bed depth can practically
only be influenced by the grinding speed. This indicates the need for increased use of
variable-speed drive units or the introduction of completely new drive solutions for
vertical mills in the near future.
4.1.3 Slag Grinding
The main advantage of vertical mills is their process simplicity with drying, grinding,
separation and material conveyance all taking place in one unit, combined with their
very good energy utilization and low wear rates. In the meantime they achieve an
equally high fineness of grinding >6000gm/cm2 (Blaine) as ball mills. In slag-grinding
Rashmi Cement Limited (Cement Division) Proposed expansion of existing Cement Grinding Plant from 0.96 MTPA to 1.11 MTPA by enhancing capacity of 2000 TPD VRM base Grinding Units to 2500 TPD due to technical constraint at village – Boria, P.O – Garhsalboni, P.S – Jhargram, District: Paschim Medinipur, W.B.
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systems, the external circulating material quantities are higher than those of raw
material and clinker grinding systems because of the lower gas velocities in the mill.
Tramp metal is removed from the circulating material by magnetic drum separators and
other separating devices. Vertical mills can handle a maximum moisture content of
20%. Moist material has the effect of a grinding aid and actually assists in the grinding
bed stabilization. Throughput rates depend greatly on the mill feed material and on the
required product finenesses.
Roller presses are employed for finish grinding and in combination grinding processes
together with ball mills. Due to their high grinding pressures and short material
compression time, the greatest energy savings are achieved in finish grinding. Finish
grinding plants of the latest generation are very compact. Due to improved separator
technology and longer grinding element service lives, roller press finish grinding plants
have become an alternative to vertical mills. The separator technology and drying in an
air stream allow the mill to be fed with GGBFS with moisture contents of up to 15%.
Depending on the system configuration, the dried material from the external material
circuit and the coarse material from the finished material separator can be mixed into
the fresh feed material for the roller press. It is sensible to have a minimum feed
material moisture content >2% in order to improve the material pull-in conditions for
the roller press.
4.1.4 Coal Grinding
Today, the product fineness demanded when grinding solid fuels is approx. <0.5–5%
residue on the 90 µm screen for petroleum coke and anthracite and <10–15% residue on
the 90 µm screen for hard coal. In each case, the required residue on the 200 µm
screen is 0%. Finer grinding of the coal reduces the NOx emissions of a kiln line, but
simultaneously decreases the throughput of the coal mill and raises the specific power
consumption of the grinding process. Reduction of the residue on the 90 µm screen by
two percentage points raises the electrical power intake by around 1 kWh/t. While the
Rashmi Cement Limited (Cement Division) Proposed expansion of existing Cement Grinding Plant from 0.96 MTPA to 1.11 MTPA by enhancing capacity of 2000 TPD VRM base Grinding Units to 2500 TPD due to technical constraint at village – Boria, P.O – Garhsalboni, P.S – Jhargram, District: Paschim Medinipur, W.B.
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specific power consumption for grinding depends on the required product fineness and
the grind ability, the amount of wear in the mill is mainly determined by the quartz and
pyrites content of the coals.
In recent year’s only two types of mill accounted for most coal grinding applications in
the cement industry. Vertical mills have meanwhile achieved a share of almost 90%,
while ball mills are just over 10%. Ball mills are almost exclusively employed for fuels
with poor grind ability. Up to now, the capacities of vertical mills for coal grinding in
cement works have ranged up to 100 tph. Keeping pace with the trend towards higher
kiln throughput rates has presented no problems. Vertical mills can cope quite flexibly
with changes in the type of fuel, different grind abilities and varying fineness
requirements, because the grinding pressures and, in some cases, the grinding table
speeds can be adjusted fully automatically.
4.1.5 Cement Packing and Dispatch
Rotary electronic packing machines will be used for packing of cement. Loading of
packed bags on trucks shall be done by truck loading machines by operators. Bags will
be of 50 kg each.
4.2 Sizing Norms
Sizing norms adopted for main machinery and storages are given below
Table 4.1-Sizing norms adopted for main machinery
Equipment
Shift
Hrs / Day
Days / year
Cement Mill 03
20 300
Packer
03 18 300
Rashmi Cement Limited (Cement Division) Proposed expansion of existing Cement Grinding Plant from 0.96 MTPA to 1.11 MTPA by enhancing capacity of 2000 TPD VRM base Grinding Units to 2500 TPD due to technical constraint at village – Boria, P.O – Garhsalboni, P.S – Jhargram, District: Paschim Medinipur, W.B.
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Table 4.2-Sizing norms adopted for storage of Raw Materials
Materials
Storage Days
Clinker
7 to 8 Days
Fly Ash
5 Days
Gypsum 8 to 10 Days
Equipment types and capacities are adopted according to the moisture content of the
raw materials.
Table 4.3-Moisture Content considered for the Raw Materials
Materials Normal Moisture content
Clinker Negligible
Fly Ash 05 %
Pond Ash 10 – 22 %
Gypsum 12 o 15 %
4.3 Cement Transport, Storage and Packing
Cement transport to cement silos will be through mechanized systems with adequate
control facilities for fugitive emissions. Existing 1 and proposed 3 nos. Cement storage
silos are
1) 12 Mt. Dia. X 15 Mt. Height – Existing
2) 8.5 Mt. Dia. X 15 Mt. Height - Proposed
3) 9.0 Mt. Dia. X 15 Mt. Height – Proposed
4) 11 Mt. Dia. X 15 Mt. Height – Proposed
Production Capacity
Here we proposed, 1 X 2500 TPD Vertical Rolling Mill. (Due to technical constraint at
the time of procuring the equipments and instruments)
Rashmi Cement Limited (Cement Division) Proposed expansion of existing Cement Grinding Plant from 0.96 MTPA to 1.11 MTPA by enhancing capacity of 2000 TPD VRM base Grinding Units to 2500 TPD due to technical constraint at village – Boria, P.O – Garhsalboni, P.S – Jhargram, District: Paschim Medinipur, W.B.
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Therefore, production capacity 7, 50,000 TPA (considering 300 days working day)
As per the EC awarded, existing VRM capacity is 1x 2000 TPD and total production
capacity is 0.96 MTPA.
So, after execution of proposed 1 x 2500 TPD VRM, overall production capacity
including existing 1 x 600 TPD Ball Mill Unit-IV and as per the EC obtained for another
1x 600 TPD Ball Mill is 1.11 MTPA .
4.4 Raw Material required along with estimated quantity, likely source,
marketing area of final products/s, mode of transport of raw material and
finished product.
The principal raw material viz., clinkers, Fly Ash, Blast Furnace Slag etc. will be
obtained from different sources which are located near the Project site. Also, Blast
Furnace Slag, Fly Ash shall be obtained from sister concern M/s Rashmi Metaliks
Limited which is 40 KM away from proposed project site.
After revision of the EC, proposed project is just the expansion project and plant will be
set up within the existing plant premises by using existing facilities, so no additional
land will be required for the proposed project.
Table-4.5 Raw Materials Requirement
Sr. No. Raw material
Requirement, TPA *
Source Mode of transport (from source to plant)
1. Clinker 8,55,600 Rajasthan, Chhattisgarh, M.P. etc.
Rail / Road
2. Slag 2,32,500 Rashmi Metaliks Ltd. (sister Concern) Kharagpur, West Bengal; Jharkhand; Orissa; Chhattisgarh etc.
Rail / Road
Rashmi Cement Limited (Cement Division) Proposed expansion of existing Cement Grinding Plant from 0.96 MTPA to 1.11 MTPA by enhancing capacity of 2000 TPD VRM base Grinding Units to 2500 TPD due to technical constraint at village – Boria, P.O – Garhsalboni, P.S – Jhargram, District: Paschim Medinipur, W.B.
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3. Fly Ash 1,80,000 Rashmi Metaliks Ltd. (sister Concern) Kharagpur, Durgapur, Kolaghat etc. West Bengal
Road
4. Gypsum 46,500 Rajasthan, West Bengal & Orissa
Rail / Road
5. Coal** 27,000 Imported (Indonesia / Australia) & Domestic
Rail / Road
** The above quantities are likely to vary in narrow range as the quality of inputs to
have variations.
Table-1.5- Proximity Materials Balance For Different Cement Manufacturing Process:
FOR ‘OPC’ FOR ‘PPC’ FOR ‘PSC’
Clinker - 0.95
Gypsum – 0.05
1 KG ‘OPC’ cement ;
Yield 100 %
Clinker – 0.65
Gypsum – 0.05
Fly Ash – 0.30
1 Kg ‘PPC’ cement ;
Yield 100%
Clinker – 0.70
Slag – 0.25
Gypsum – 0.05
1 Kg ‘PSC’ cement
Yield 100 %
4.5 Equipment Selection
A list of equipment and storages capacities chosen for the expansion of Cement
grinding unit from 0.18 MTPA TO 0.96 MTPA by installing 1x 600 TPD Ball mill & 1x
2000 TPD VRM are given below. While selecting a particular type of equipments/
instruments it was found that the capacity of the VRM is standing 2500 TPD (Approx.)
instead of 2000 TPD.
In selecting a particular type of equipments/instruments or storage for the project,
among others, the following issues have been considered:
Rashmi Cement Limited (Cement Division) Proposed expansion of existing Cement Grinding Plant from 0.96 MTPA to 1.11 MTPA by enhancing capacity of 2000 TPD VRM base Grinding Units to 2500 TPD due to technical constraint at village – Boria, P.O – Garhsalboni, P.S – Jhargram, District: Paschim Medinipur, W.B.
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Equipment costs
Energy consumption
Raw material characteristics
Sizes in which the equipment is available
Lead times for particular types of equipment
Operating experience with various types of equipment
Ease of operation of equipment
Product to be manufactured
Site conditions
Local skills available
Environmental issues
A. Civil Structure
Sr. No. DESCRIPTION
1 Weigh Bridge
2 Clinker Truck Un-loader Cap:-100 T Qty:-1 Nos.
3 Clinker Silo: - 1 No.
4 Cement + Roller press building (including hopper building) X 01 Nos.
5 Cement Silo 3 No. Cap :- 5000 T
6 Fly ash Silo 1 No. Cap :- 3,000 T
7 Packer building 02 Nos. (01 exists and proposed Packers 3Spout x 03 Nos.)
8 Truck loading area (8 Nos. per m/c)
9 Empty Bag Storage area Qty :- 1 No.
10 Pack. Electrical Room Qty: - Existing.
11 Compressor Room Qty :- 1 No.
12 13
Water tank & Pump House Qty :- Existing Load center Qty :- 1 No.
B. Clinker Storage & Handling
Sr. No. DESCRIPTION
1 Hydraulic truck un-loader
2 Bag filter with RAL & S/C for clinker unloading
3 Fan for above bag filter
4 Belt conveyor from dump hopper to cross belt conveyor
5 Clinker extraction gates below hopper
6 Belt conveyor from dump hopper to cross belt conveyor
Rashmi Cement Limited (Cement Division) Proposed expansion of existing Cement Grinding Plant from 0.96 MTPA to 1.11 MTPA by enhancing capacity of 2000 TPD VRM base Grinding Units to 2500 TPD due to technical constraint at village – Boria, P.O – Garhsalboni, P.S – Jhargram, District: Paschim Medinipur, W.B.
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7 Belt conveyor for clinker feeding from
elevator to clinker silo
8 Gear boxes & couplings
C. Roller Press Circuit
Sr. No. DESCRIPTION
1 Cement mill with separator
2 Roller Press with V separator
3 Reversible Belt conveyor above gypsum/additive hopper
4 Gear box & couplings
5 Bag filter with RAL for hoppers (clinker, Additive & gypsum)
6 Belt weigh feeders below clinker hopper
7 Belt weigh feeders below gypsum hopper
8 Belt weigh feeders below additive hopper
9 Bag filter with fan for weigh feeder group
10 Gear box & couplings
11 Roller Press recirculation elevator (Chain type)
12 Metal detector
13 Magnetic separator
14 Belt conveyor from elevator discharge to V- separator feeding
15 Bag Filter with RAL & S/C for Cement mill venting
16 Bag Filter with RAL for transport auxiliaries & Elevator Venting in Cement mill section
17 Bag filter with RAL& S/C for SKS venting
18 Solid flow meter SKS reject
19 Non Return Valves for air slide blowers
20 Aluma Coat BR for Cyclones
21 Non metallic expansion joints
22 Lubricants
23 Grinding Media (for single chamber mill)
24 Raw Water tank
25 Water pumps
26 Cooling tower
27 EOT Crane for Roller press & mill drive
28 Bag filter for separator venting
Rashmi Cement Limited (Cement Division) Proposed expansion of existing Cement Grinding Plant from 0.96 MTPA to 1.11 MTPA by enhancing capacity of 2000 TPD VRM base Grinding Units to 2500 TPD due to technical constraint at village – Boria, P.O – Garhsalboni, P.S – Jhargram, District: Paschim Medinipur, W.B.
Page 36 of 59
D. Equipment for Fly Ash handling system
Sr. No. DESCRIPTION
1 Fly Ash Silo Equipments (Dia. Mtr.)
2 Roots Blower
3 Hydraulic truck un-loader
4 Bag filter for fly ash bin de-dusting
5 Manual slide gate below fly ash hopper
6 Pneumatic Slide gate below fly ash hopper
7 Motorized flow control gate
8 Air slide from hopper to silo feeding
elevator
9 Fly ash Silo feeding Bucket Elevator (Belt type)
10 Gear Box & couplings
11 Bag Filter with fan at fly ash silo top
12 Bag filter with fan at Silo extraction
13 Air heater
14 Solid flow meter at discharge of FA silo
control bin air slide
E. Packing plant
Sr. No. DESCRIPTION
1 Packing Plant Equipment
2 Belt conveyor & diverters
3 Hanging type truck loading machine
4 Belt bucket elevator for 16 spout packers
5 Gear boxes & couplings
6 Bag filters with RAL for Rotor Packer & packing plant
de-dusting
7 Roller Press venting
8 Slide gate & Pneumatic gate for bulker loading
9 Air slide blowers
10 Package Compressors
11 Air receivers
12 Empty Bag Conveyor
13 Passenger cum good hoist
Rashmi Cement Limited (Cement Division) Proposed expansion of existing Cement Grinding Plant from 0.96 MTPA to 1.11 MTPA by enhancing capacity of 2000 TPD VRM base Grinding Units to 2500 TPD due to technical constraint at village – Boria, P.O – Garhsalboni, P.S – Jhargram, District: Paschim Medinipur, W.B.
Page 37 of 59
F. Details of instrumentation equipments proposed for New Cement Mill
Sr. No. DESCRIPTION
Field Instrument.
1 Ultra Sonic level transmitter
2 Pressure transmitter (0-10 Kg)
3 R. F. Level switch
4 Proximity
5 RTD Sensor
6 Differential Pressure Transmitter
7 Vibration Transmitters
8 Belt Weigher
9 Bin Weighing
10 Position Transmitters
11 Pulse Techo
12 Techo
13 Water /Oil Flow Meter
14 Electronic Ear
15 Hooter
16 Dust Monitoring System
17 Radar Level Transmitter
18 High pressure Transmitter
19 Pneumatic Panel for Solenoid valve
20 Solenoid Valves
21 Miscellaneous Field Instruments Like Isolation Transformer, Signal Isolators, Glass fuse, Terminal, Signal converter, FRL unit, MCB's, Automatic drain valve, Relays, Relay Base, LED Lamps, Limit
Switches etc.
Fly-Ash Feeding System
1 Radar Level Transmitter
2 Solenoid Valves
3 Pneumatic Panel for Solenoid valve
4 Proximity
5 Miscellaneous Field Instruments Like Isolation Transformer, Signal
Isolators, Glass fuse, Terminal, Signal converter, FRL unit, MCB's, Automatic drain valve , Relays, Relay Base, LED Lamps, Limit
Switches etc.
Rashmi Cement Limited (Cement Division) Proposed expansion of existing Cement Grinding Plant from 0.96 MTPA to 1.11 MTPA by enhancing capacity of 2000 TPD VRM base Grinding Units to 2500 TPD due to technical constraint at village – Boria, P.O – Garhsalboni, P.S – Jhargram, District: Paschim Medinipur, W.B.
Page 38 of 59
Packing Plant & Dispatch
1 Radar Level Transmitter
2 Solenoid Valves
3 Pneumatic Panel for Solenoid valve
4 Proximity
5 Miscellaneous Field Instruments Like Isolation Transformer ,Signal
Isolators, Glass fuse, Terminal, Signal converter, FRL unit, MCB's, Automatic drain valve , Relays, Relay Base, LED Lamps, Limit Switches etc.
Gypsum Handling
1 Field Instrumentation
2 Hardware & Cables
3 DCS System Clinker Handling
1 Field Instrumentation
2 Hardware & Cables
3 DCS System
Rashmi Cement Limited (Cement Division) Proposed expansion of existing Cement Grinding Plant from 0.96 MTPA to 1.11 MTPA by enhancing capacity of 2000 TPD VRM base Grinding Units to 2500 TPD due to technical constraint at village – Boria, P.O – Garhsalboni, P.S – Jhargram, District: Paschim Medinipur, W.B.
Page 39 of 59
Figure 4.2: Proposed Cement Grinding Process Flow Diagram
4.6 Major Utility Facilities
4.6.1 Power Requirement
The power requirement for the proposed expansion of 1.11 MTPA Cement Grinding Unit
is around 3.5 MW, which will be sourced from WBSEDCL and Captive Power Plant of
Steel & Power Division (18 MW is under operational), at a distance of 2 kms away from
the proposed project site.
Rashmi Cement Limited (Cement Division) Proposed expansion of existing Cement Grinding Plant from 0.96 MTPA to 1.11 MTPA by enhancing capacity of 2000 TPD VRM base Grinding Units to 2500 TPD due to technical constraint at village – Boria, P.O – Garhsalboni, P.S – Jhargram, District: Paschim Medinipur, W.B.
Page 40 of 59
4.6.2 Compressed Air Supply
As mentioned in the Project Feasibility Report submitted for obtaining EC NO
1276/EN/T-II-1/044/2014 on 27.05.2015, for the expansion of Cement grinding unit from
0.18 MTPA TO 0.96 MTPA by installing 1x 600 TPD Ball mill & 1x 2000 TPD VRM, it
will not be changed.
The same will be applicable i.e. Centralized compressor and blower room would be
installed for the sake of overall economy, effectiveness and to facilitate the operation
and maintenance of the plant. The compressed air would be required mainly for dust
collection from the equipments and operation of pneumatic valves. Blowers will be used
for aeration of silos.
A centralized compressor room would be installed for cement grinding, storage and
packing section. Blowers will be suitably accommodated under buildings/ silos near
points of utility.
4.6.3 Central Control Room (CCR)
As mentioned in the Project Feasibility Report submitted for obtaining EC NO
1276/EN/T-II-1/044/2014 on 27.05.2015, for the expansion of Cement grinding unit from
0.18 MTPA TO 0.96 MTPA by installing 1x 600 TPD Ball mill & 1x 2000 TPD VRM, it
will not be changed.
The same will be applicable i.e. A CCR building will be constructed. Operation of the
cement mill and packing plants will be carried out from this control room.
4.6.4 Fire Fighting System
As mentioned in the Project Feasibility Report submitted for obtaining E.C NO
1276/EN/T-II-1/044/2014 on 27.05.2015, for the expansion of Cement grinding unit from
Rashmi Cement Limited (Cement Division) Proposed expansion of existing Cement Grinding Plant from 0.96 MTPA to 1.11 MTPA by enhancing capacity of 2000 TPD VRM base Grinding Units to 2500 TPD due to technical constraint at village – Boria, P.O – Garhsalboni, P.S – Jhargram, District: Paschim Medinipur, W.B.
Page 41 of 59
0.18 MTPA TO 0.96 MTPA by installing 1x 600 TPD Ball mill & 1x 2000 TPD VRM, it
will not be changed.
The same will be applicable i.e. A complete fire fighting system would be provided
comprising of -
Fire extinguishers at various locations of the plant like process buildings, offices,
CCR and laboratory building, etc.
The protection of the following areas by means of the fire hydrant system:
- Corrective / additive crusher
- Clinker transport
- Gypsum transport
- Fly ash and slag transport
- Clinker grinding
- Cement Silo and Packing Plant
- Wagon Tippler for coal
- Coal crushing and transport section
- Coal Grinding and Fine coal transport
- Electrical rooms
- Compressor rooms
- Workshop and stores
- CCR and Laboratory building
4.7 Water Supply Facilities
As mentioned in the Project Feasibility Report submitted for obtaining EC NO
1276/EN/T-II-1/044/2014 on 27.05.2015, for the expansion of Cement grinding unit from
0.18 MTPA TO 0.96 MTPA by installing 1x 600 TPD Ball mill & 1x 2000 TPD VRM, it
will not be changed.
Rashmi Cement Limited (Cement Division) Proposed expansion of existing Cement Grinding Plant from 0.96 MTPA to 1.11 MTPA by enhancing capacity of 2000 TPD VRM base Grinding Units to 2500 TPD due to technical constraint at village – Boria, P.O – Garhsalboni, P.S – Jhargram, District: Paschim Medinipur, W.B.
Page 42 of 59
The same will be applicable i.e. as per initial estimation; total daily make up water
requirement for the proposed Cement Grinding Unit including domestic water demand
will be 23 KLD.
This requirement will be met from the existing bore well, made in the plant area and
also from the Rain Water Harvesting pond. The necessary permission has already
obtained from SWID, Govt. of West Bengal.
Raw water treatment plant will be installed for pre-treatment of raw water and the
clarified water will be pumped through HDPE food grade pipeline to the proposed unit.
An indicative water balance for the proposed plant is presented in Figure-4.3.
Rashmi Cement Limited (Cement Division) Proposed expansion of existing Cement Grinding Plant from 0.96 MTPA to 1.11 MTPA by enhancing capacity of 2000 TPD VRM base Grinding Units to 2500 TPD due to technical constraint at village – Boria, P.O – Garhsalboni, P.S – Jhargram, District: Paschim Medinipur, W.B.
Page 43 of 59
Drinking water system
Raw water after necessary clarification and filtration through gravity filter will be
disinfected and stored in the drinking water storage tank and will be pumped to an
overhead tank. Drinking water from this overhead tank will be supplied by means of a
piping network, completed with valves, fittings and appurtenances.
Fire fighting water system
The fire fighting water network will be provided with adequate number of yard hydrants
and in-shop landing valves to combat fire hazards in the plant.
To ensure availability of water at designed pressure for fire fighting, electric motor
driven and standby diesel engine driven pump sets will be provided. Main electrical
driven fire fighting pumps and diesel engines driven standby fire fighting pumps will be
provided for fire fighting purpose. In case of fire, the main fire fighting pump will pump
fire fighting water to the hydrants. An independent piping network will be provided
complete with pipelines, valves, hydrants, fittings and appurtenances for the said
purpose.
Raw water treatment and filtration plant
A raw water pump house of concrete construction along with treatment plant, filtration
plant and make-up water pump house is proposed to be provided at raw water reservoir
to meet the make-up water requirement of these units. Make-up water will be pumped
through MS pipeline to different plant consumers.
Overhead tanks
Overhead tanks will be provided for supply of emergency water to critical consumers for
a short duration in the event of interruption in normal cooling water supply. The
Rashmi Cement Limited (Cement Division) Proposed expansion of existing Cement Grinding Plant from 0.96 MTPA to 1.11 MTPA by enhancing capacity of 2000 TPD VRM base Grinding Units to 2500 TPD due to technical constraint at village – Boria, P.O – Garhsalboni, P.S – Jhargram, District: Paschim Medinipur, W.B.
Page 44 of 59
overhead tanks will be multi-compartment type, each compartment serving emergency
water requirements of individual consumers.
4.8 Man Power Requirement
As mentioned in the Project Feasibility Report submitted for obtaining EC NO
1276/EN/T-II-1/044/2014 on 27.05.2015, for the expansion of Cement grinding unit from
0.18 MTPA TO 0.96 MTPA by installing 1x 600 TPD Ball mill & 1x 2000 TPD VRM, it
will not be changed.
The same will be applicable i.e. during operation phase approx. direct employment of
100 will be taken from local areas, depending upon their skill and competency and
around 110 persons will be engaged through employment agencies for different
supportive activities.
Construction manpower will be coming to site mostly from the neighbourhood on daily
basis. This will be supplemented by various specialized groups of construction and
installation workmen who will be brought to the construction site by their respective
construction firms.
4.9 PROJECT COST
A VRM is a compact unit, making the footprint of the installation smaller and reducing
the civil engineering costs when compared to a ball mill system. Savings are also made
due to the method of construction of the two systems. Ball mills are built at the
supplier’s factory and transported to the cement producer’s site. In contrast, the
vertical mill is built onsite at the cement plant, avoiding difficult logistical issues and
associated costs. The equipment costs are higher for a VRM than a ball mill, reflecting
the greater complexity of the system, which includes items such as the rollers, table
and the hydraulic system. Overall, when equipment, erection and civil costs are taken
Rashmi Cement Limited (Cement Division) Proposed expansion of existing Cement Grinding Plant from 0.96 MTPA to 1.11 MTPA by enhancing capacity of 2000 TPD VRM base Grinding Units to 2500 TPD due to technical constraint at village – Boria, P.O – Garhsalboni, P.S – Jhargram, District: Paschim Medinipur, W.B.
Page 45 of 59
into account, the cost of a VRM project is around 20 – 25% greater than a ball mill
system of the same capacity.
There will be around 30 lacs of additional cost going to be incurred while purchasing
the equipments and instrument in order to meet the technical specification. The earlier
project cost was 45 crores while obtaining EC – No.-1276/EN/T-II-I/044/2014; Dated
27/05/2015 for units (1x600 TPD Ball Mill + 1x2000 TPD VRM).
Now the project cost will stand 45 crores 30 lacs.
DESCRIPTION COST
Additional Cost for purchasing equipments & instruments
(Enhancing VRM capacity to 2500 TPD)
Rs 30 lacs
Total Capital Cost of the Project for 1x600 TPD Ball Mill + 1x2000 TPD VRM. (EC already Obtained)
Rs. 45 Crores
Total Capital Cost for Environmental Pollution Control Measures
Rs. 2.25 Crores
Recurring Cost / annum for Environmental Pollution Control
Measures
Rs. 0.25 Crores
Total Cost of the Project Rs 45 Crores 30 Lacs
4.10 Power Requirement
Sr. No.
Detail
Requirement, (MW)
as per ‘EC’ obtained
Requirement, (MW) after Revision of
‘EC’*
Source
1. Power 3 (For 0.96 MTPA base
Grinding unit)
3.5 (For 1.11
MTPA base
Grinding unit)
WBSEDCL and Captive Power Plant of RCL-Steel & Power Division which is at a distance of 2 km from the proposed site.
Rashmi Cement Limited (Cement Division) Proposed expansion of existing Cement Grinding Plant from 0.96 MTPA to 1.11 MTPA by enhancing capacity of 2000 TPD VRM base Grinding Units to 2500 TPD due to technical constraint at village – Boria, P.O – Garhsalboni, P.S – Jhargram, District: Paschim Medinipur, W.B.
Page 46 of 59
Chapter -5 – Site Analysis
5.1 CONNECTIVITY:
The project site is well connected to Howrah (160 Kms) Kharagpur and to Tata Nagar
(96 Kms) via Ghatsila. It is nearest city Kharagpur is at a distance of 50 Kms and
Jhargram Town 8 KM. The nearest Railway station Jhargram railway station at a
distance of about 10 km is the main railway station on broad gauge line of South
Eastern Railway connecting Howrah and Jamshedpur. This distance chart of major
cities and towns in WB from the project Site is as below.
To Distance in Kms
Jhargram 10
Kharagpur 45
Howrah 160
Tata Nagar 96
5.2 LAND FORM, LAND USE AND LAND OWNERSHIP
No additional land is required for the above mention expansion project. Proposed
expansion within 13 acres land is ownership under Rashmi Cement Limited.
5.3 TOPOGRAPHY (ALONG WITH MAP)
The area exhibits gently undulating topography in entire acquired 13 acres of land.
Rashmi Cement Limited (Cement Division) Proposed expansion of existing Cement Grinding Plant from 0.96 MTPA to 1.11 MTPA by enhancing capacity of 2000 TPD VRM base Grinding Units to 2500 TPD due to technical constraint at village – Boria, P.O – Garhsalboni, P.S – Jhargram, District: Paschim Medinipur, W.B.
Page 47 of 59
5.4 EXISTING LAND USED PATTERN
Proposed plant site does not falls under the CRZ area or notified industrial area.
Existing plant premises having 1x 600 TPD capacities Ball Mill, Coal fired Slag dryers,
covered Raw Materials Storage areas, Electronic packing units, Control Room,
Laboratory, Admin. Office etc., under construction 1x 600 TPD Ball Mill & VRM also
having thick Green Belt and Rain Water Harvesting pond. So, proposed expansion unit
will be use for existing facilities and set up 1.11 MTPA Cement Grinding units by VRM
technology which is more advanced technology for the cement grinding unit.
5.5 SOIL CLASSIFICATION
Predominantly the texture of the soil is clay. Sand, slit and clay percentage ranges
form 22-27%, 32-35% and 40-43% respectively.
5.6 CLIMATE DATA FROM SECONDARY SOURCES
The secondary data has been collected during Environmental parameters
monitoring time in 10 KM buffer zone from the project location.
Rashmi Cement Limited (Cement Division) Proposed expansion of existing Cement Grinding Plant from 0.96 MTPA to 1.11 MTPA by enhancing capacity of 2000 TPD VRM base Grinding Units to 2500 TPD due to technical constraint at village – Boria, P.O – Garhsalboni, P.S – Jhargram, District: Paschim Medinipur, W.B.
Page 48 of 59
5.7 SOCIAL INFRASTRUCTURE AVAILABILITY
All infrastructure facilities such as education, health facilities and
other social facilities are adequate at district headquarter Medinipur and
Jhargram, Kharagpur.
Jhargram town distance from the proposed expansion project site around
8 KM, entire area enjoying the modern facilities. Rashmi Cement limited
also committed to socio-economic development to entire area.
Rashmi Cement Limited (Cement Division) Proposed expansion of existing Cement Grinding Plant from 0.96 MTPA to 1.11 MTPA by enhancing capacity of 2000 TPD VRM base Grinding Units to 2500 TPD due to technical constraint at village – Boria, P.O – Garhsalboni, P.S – Jhargram, District: Paschim Medinipur, W.B.
Page 49 of 59
Chapter -6 – Environment Management Plan
6.1 Solid Waste Management
As mentioned in the Project Feasibility Report submitted for obtaining EC NO
1276/EN/T-II-1/044/2014 on 27.05.2015, for the expansion of Cement grinding unit
from 0.18 MTPA TO 0.96 MTPA by installing 1x 600 TPD Ball mill & 1x 2000 TPD VRM,
it will not be changed.
The same will be applicable i.e.
The solid waste, which is generated in the form of dust from all the air pollution
control equipments of cement plant will be 100% recycled in the process.
Electrical & electronic equipments and components will be handled as per e-
waste Management & Handling Rules, 2011.
Plastics generated from packing materials and others source will be handled as
per The Plastics (Manufacture, Usage & Waste Management) Rules, 2008 & The
Recycled Plastics Manufacture & Usage Rules, 1999.
All Hazardous Waste will be treated as per The Hazardous Wastes (Management,
Handling & Trans-boundary Movement) Rules, 2008.
Batteries will be disposed as per Batteries (Management and Handling)
Amendment Rules, 2001.
Used oil & waste oil generating due to maintenance will be sold to authorized
dealers by CPCB.
Municipal solid waste generated from colony and plant will be segregated and
disposed as per the Municipal Solid Waste Management, Handling Rules.
Rashmi Cement Limited (Cement Division) Proposed expansion of existing Cement Grinding Plant from 0.96 MTPA to 1.11 MTPA by enhancing capacity of 2000 TPD VRM base Grinding Units to 2500 TPD due to technical constraint at village – Boria, P.O – Garhsalboni, P.S – Jhargram, District: Paschim Medinipur, W.B.
Page 50 of 59
Figure 6.1: Management of Solid Waste
6.2 Pollution Control Measures
As mentioned in the Project Feasibility Report submitted for obtaining EC NO
1276/EN/T-II-1/044/2014 on 27.05.2015, for the expansion of Cement grinding unit from
0.18 MTPA TO 0.96 MTPA by installing 1x 600 TPD Ball mill & 1x 2000 TPD VRM, it
will not be changed.
The same will be applicable i.e.
Rashmi Cement Limited (Cement Division) Proposed expansion of existing Cement Grinding Plant from 0.96 MTPA to 1.11 MTPA by enhancing capacity of 2000 TPD VRM base Grinding Units to 2500 TPD due to technical constraint at village – Boria, P.O – Garhsalboni, P.S – Jhargram, District: Paschim Medinipur, W.B.
Page 51 of 59
Characteristic of Pollutant Emission Source: Table-6.1
Source Pollutants Control measures
A. Air pollution
B. Domestic wastewater
C. Solid Waste
Dust and Fumes
Waste water
Dust
Bag / cascade filters would be
provided in various sections of material handling and processing
units for controlling air pollution. The waste gases would be discharged through tall stacks to
ensure adequate dispersion and dilution of pollutants.
To be used for green belt.
Collected dust from the control devices will be recycled in the
process.
Table – 6.2-Location of APC Devices
Sr. No. Location Name of the
APC Devices
Proposed
Stack Height
1 Ball Mill (600 TPD) Pulse Jet Bag Filter 35 Meter
2 Vertical Roller Mill (2500 TPD)
Pulse Jet Bag Filter 35 Meter
3 Slag Dryer (1x30 TPH) Cyclone with Bag Filter 35 Meter
4 Cement Storage Silo
(2 Nos.)
Pneumatic conveyer system
with common Bag Filter
35 Meter
(Common Stack)
5 Fly Ash Silo
(1 No.)
Pneumatic conveyer system with common Bag Filter
35 Meter
6 Clinker unloading section
Pneumatic conveyer system with common Bag Filter
Circulating in process
Rashmi Cement Limited (Cement Division) Proposed expansion of existing Cement Grinding Plant from 0.96 MTPA to 1.11 MTPA by enhancing capacity of 2000 TPD VRM base Grinding Units to 2500 TPD due to technical constraint at village – Boria, P.O – Garhsalboni, P.S – Jhargram, District: Paschim Medinipur, W.B.
Page 52 of 59
7
Roller Press Circuit Common Bag filter with RAL
for hoppers (clinker, Additive & gypsum) and weigh feeder group
Circulating in
process
8
Roller Press Circuit
Common Pulse Jet Bag Filter
with RAL & S/C for Cement mill venting and transport auxiliaries & Elevator Venting
in Cement mill section
Common Pulse Jet Bag filter with RAL& S/C for SKS
Venting and separator venting
Common
stack 35 Meter
9
Packing section (2 Nos.) Pneumatic conveyer system with common Pulse Jet Bag Filter
Common stack 35
Meter
Figure 6.2: Cross Sectional View of Bag Filters
Rashmi Cement Limited (Cement Division) Proposed expansion of existing Cement Grinding Plant from 0.96 MTPA to 1.11 MTPA by enhancing capacity of 2000 TPD VRM base Grinding Units to 2500 TPD due to technical constraint at village – Boria, P.O – Garhsalboni, P.S – Jhargram, District: Paschim Medinipur, W.B.
Page 53 of 59
6.3 Control Of Fugitive Emissions At Various Auxiliary Facilities
Inside The Plant
As mentioned in the Project Feasibility Report submitted for obtaining EC NO
1276/EN/T-II-1/044/2014 on 27.05.2015, for the expansion of Cement grinding unit from
0.18 MTPA TO 0.96 MTPA by installing 1x 600 TPD Ball mill & 1x 2000 TPD VRM, it
will not be changed.
The same will be applicable i.e.There will be Dust Extraction / Dust Suppression
Systems / Foggy Dust Arresters to control fugitive emissions from raw material
handling section and various other facilities inside the plant.
Besides, the dust, collected in the bag filters will be 100% recycled in the process.
6.4 Wastewater Generation & Treatment
As mentioned in the Project Feasibility Report submitted for obtaining EC NO
1276/EN/T-II-1/044/2014 on 27.05.2015, for the expansion of Cement grinding unit from
0.18 MTPA TO 0.96 MTPA by installing 1x 600 TPD Ball mill & 1x 2000 TPD VRM, it
will not be changed.
The same will be applicable i.e. No industrial wastewater will be generated from the
process.
Domestic wastewater generated from plant will be treated in Septic Tank- Soak Pit
system. The treated wastewater will be reused for various purposes including
plantation, dust suppression etc.
6.5 Rain Water Harvesting
As mentioned in the Project Feasibility Report submitted for obtaining EC NO
1276/EN/T-II-1/044/2014 on 27.05.2015, for the expansion of Cement grinding unit from
Rashmi Cement Limited (Cement Division) Proposed expansion of existing Cement Grinding Plant from 0.96 MTPA to 1.11 MTPA by enhancing capacity of 2000 TPD VRM base Grinding Units to 2500 TPD due to technical constraint at village – Boria, P.O – Garhsalboni, P.S – Jhargram, District: Paschim Medinipur, W.B.
Page 54 of 59
0.18 MTPA TO 0.96 MTPA by installing 1x 600 TPD Ball mill & 1x 2000 TPD VRM, it
will not be changed.
The same will be applicable i.e. The entire land of the plant area has to be leveled in
such a way that Rain Water flows down to the RCC constructed Rain Water storage
pond. Water will enter into the storage pond through filter bed. Filter bed will be made
with different size of gravels and core sand. The filtrate water will be stored in the pond.
The same water will be rinsed for industrial as well as domestic purposes through water
pump and motor. The residue of the filter bed will be removed manually from time to
time. The storm water drainage channel passing through the site will also be connected
to the said pond for conservation of the rain water, which shall be used for various
purposes inside the plant.
Rain Water harvesting potential:
Totals Project Area – 13.00 acres (5.26 hectare)
Average annual rain fall in the project area - 1500 mm (as per IMD data)
Average annual monsoon rain fall - 80% of 1500 mm = 1200 mm
Volume of surface run off in the plant campus = 5.26 x 1.20 x 0.4 ham,
= 2.5248 ham say 0.025 mcm
Rain water harvesting potential of the plant campus – 0.025 mcm
Around 0.015 mcm of water can be conserved within the plant area. Considering the
average depth of 2.5 m in storage tank, area for surface storage involves around 0.61
ha (1.5 acres) which is 11.5% of the project area. (Note: ham: Hectare meter; mcm:
million cubic meter)
6.6 Storm Water Management
As mentioned in the Project Feasibility Report submitted for obtaining EC NO
1276/EN/T-II-1/044/2014 on 27.05.2015, for the expansion of Cement grinding unit from
Rashmi Cement Limited (Cement Division) Proposed expansion of existing Cement Grinding Plant from 0.96 MTPA to 1.11 MTPA by enhancing capacity of 2000 TPD VRM base Grinding Units to 2500 TPD due to technical constraint at village – Boria, P.O – Garhsalboni, P.S – Jhargram, District: Paschim Medinipur, W.B.
Page 55 of 59
0.18 MTPA TO 0.96 MTPA by installing 1x 600 TPD Ball mill & 1x 2000 TPD VRM, it
will not be changed.
The same will be applicable i.e. The effectiveness of the drainage system depends on
proper cleaning of all drainage pipes/channels. Regular checking will be done to see
that none of the drains are clogged due to accumulation of sludge/sediments.
6.7 Land & Greenbelt Development
As mentioned in the Project Feasibility Report submitted for obtaining EC NO
1276/EN/T-II-1/044/2014 on 27.05.2015, for the expansion of Cement grinding unit from
0.18 MTPA TO 0.96 MTPA by installing 1x 600 TPD Ball mill & 1x 2000 TPD VRM, it
will not be changed.
The same will be applicable i.e. The proposed project will be installed within the
existing plant area of 13 acres. No additional land shall be acquired.
Land Requirement
The Land use pattern of the proposed cement plant, Infrastructure, residential colony
etc. is mentioned below:
Table- 6.3 -Land Use Planning of the Project Site
Sr. No. Description Existing Area
(in Acres)
Proposed Area
( in Acres )
1. Raw Materials Yard 1.5 1.0
2. Cement Plant 0.6 3.3
3. Administration with
Control Room 0.5
0.3
4. Green Belt Development 4.3
5. Rain Water Harvesting 1.5
TOTAL
13 Acres (No additional land is required for
this expansion project)
There will be minimum earth and muck, which will be used inside the project area for the leveling purpose. The utilities and plant structure will be aligned with bare minimum cuts & fill.
Rashmi Cement Limited (Cement Division) Proposed expansion of existing Cement Grinding Plant from 0.96 MTPA to 1.11 MTPA by enhancing capacity of 2000 TPD VRM base Grinding Units to 2500 TPD due to technical constraint at village – Boria, P.O – Garhsalboni, P.S – Jhargram, District: Paschim Medinipur, W.B.
Page 56 of 59
6.8 Green Belt Development Plan
Trees filter particulates and are effective as sink of pollutants. Tree also reduces noise
level and regulates the oxygen balance in the area by consuming released carbon
dioxide. Hence, greenbelt development shall be part of pollution control measure
adopted in the open spaces in the plant area.
In order to enhance land use as well as to compensate for any loss in ecology during
construction, adequate plantation programme has been planned and shall be adopted
with plantation of adequate number of trees. Green belt development shall be taken up
starting from the construction phase of the proposed project.
As mentioned in the Project Feasibility Report submitted for obtaining EC NO
1276/EN/T-II-1/044/2014 on 27.05.2015, for the expansion of Cement grinding unit from
0.18 MTPA TO 0.96 MTPA by installing 1x 600 TPD Ball mill & 1x 2000 TPD VRM, it
will not be changed.
The same will be applicable i.e. Plantation along road & plant boundary will attenuate
noise level, arrest dust and improve the aesthetic environment of the surrounding area.
Local species will be planted after consultation with local forest officer as per CPCB
guidelines. Monocultures and alien plant species will be discouraged to the maximum
possible extent.
Considering the need of open space for fire fighting and safety requirement, greenbelt
has been planned along the periphery in addition to small patches of green area in the
unutilized open space, roadside tree plantation and grass lawns.
Out of the total plant area of 13 acres (5.26 hectares), around 4.3 acres (1.74 hectares)
shall be covered under green belt in the project area.
Rashmi Cement Limited (Cement Division) Proposed expansion of existing Cement Grinding Plant from 0.96 MTPA to 1.11 MTPA by enhancing capacity of 2000 TPD VRM base Grinding Units to 2500 TPD due to technical constraint at village – Boria, P.O – Garhsalboni, P.S – Jhargram, District: Paschim Medinipur, W.B.
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Chapter -7 – Rehabilitation & Resettlement Plan
Proposed unit will be set up in existing plant premises, so no additional land has been
required for the above mention cement grinding unit. As a result, no Rehabilitation and
Resettlement plan will be required for the proposed project except community
development through ‘CSR’ activities.
Rashmi Cement Limited (Cement Division) Proposed expansion of existing Cement Grinding Plant from 0.96 MTPA to 1.11 MTPA by enhancing capacity of 2000 TPD VRM base Grinding Units to 2500 TPD due to technical constraint at village – Boria, P.O – Garhsalboni, P.S – Jhargram, District: Paschim Medinipur, W.B.
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Chapter -8 – Project Schedule & Cost Estimate
Detail
This project would be designed by Capex Projects Management division of RASHMI
GROUP and will be executed by M/s Rashmi Cement Limited (Cement Division) project
division, which is located at Kolkata, West Bengal. As we have already obtained EC on
27th May-2015 for 1x 600 TPD Ball Mill & 1x 2000 TPD VRM based Cement Grinding
units and as already mentioned in the project feasibility report submitted for getting the
above mentioned EC, that the project is scheduled to be completed in phase wise 1st
Phase 1 unit of 600 TPD closed circuit Ball Mill will be completed within 10 months
from the starting date i.e. from the date of receiving all the statutory clearances and
another 2000 TPD closed circuit VRM will be completed depending on market, expected
within 60 months from the received of clearance. Now due to idue to some technical
constraint we are enhancing the capacity further from 0.96 MTPA to 1.11 MTPA by
upgrading 2000 TPD VRM to 2500 TPD Vertical Rolling Mill base Grinding Units. The
entire project will be completed within 60 months from the date of obtaining of
Environment Clearance & Consent to establish.
There will be around 30 lacs of additional cost going to be incurred while purchasing
the equipments and instrument in order to meet the technical specification. The earlier
project cost was 45 crores while obtaining EC – No.-1276/EN/T-II-I/044/2014; Dated
27/05/2015 for units (1x600 TPD Ball Mill + 1x2000 TPD VRM).
Now the project cost will stand 45 crores 30 lacs.
Rashmi Cement Limited (Cement Division) Proposed expansion of existing Cement Grinding Plant from 0.96 MTPA to 1.11 MTPA by enhancing capacity of 2000 TPD VRM base Grinding Units to 2500 TPD due to technical constraint at village – Boria, P.O – Garhsalboni, P.S – Jhargram, District: Paschim Medinipur, W.B.
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Chapter -9 – Analysis of Proposal (Final Recommendations)
9.1 Financial and social benefits with special emphasis on the benefit to the local people including tribal population, if any in the area. Based on the growing demand in the state of West Bengal over the next 10 years, the
proximity of the project location to this market is an advantage with respect reduction
in freight of cement to these markets. The financial viability also shows a good Rate of
return from the project. The project is environmental friendly as it is using thermal
power waste. Considering the above, RCL is planning to go-ahead with the project,
once it gets all the statutory approvals
Employment; Medical facilities; Educational facilities; Infrastructure facilities: Will remain same as mentioned earlier while obtaining EC – No.-1276/EN/T-II-
I/044/2014; Dated: 27/05/2015 for units (1x600 TPD Ball Mill + 1x2000 TPD VRM) as
we are just enhancing the capacity of VRM from 2000 TPD to 2500 TPD because of
Technical constraint at the time of procurements of instruments & machineries.