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Loesche Grinding Plants for Coal GasificationLoesche Grinding Plants for Coal Gasification
Presented by Carsten SchössowLoesche GmbH, Germany [email protected]
www.loesche.com
23-Oct-08 2
Company Profile
Loesche GmbH
was founded in 1906 in Berlin, Germany
is a privately owned company certified according to DIN EN ISO 9001
has 290 employees in Düsseldorf, Germany - worldwide more than 500 employees
with associated companies in Spain, South Africa, USA, China, UK and India as well as representatives and agents wordwide
23-Oct-08 3
Cement raw material grinding plants with 2, 3, 4 and 6 grinding roller mills for a capacity up to 1.000 t/h of cement raw meal and drive motors up to 6,500 kW
Grinding plants for cement clinker up to 350 t/h and blast furnace slag up to 250 t/h with fineness between 2,800 and 6,000 cm²/g.
Dry grinding plants for coal with a capacity up to 150 t/h, grinding a wide range of coals varying from steam coal, bituminous-, anthracite-, lignite and predriedlignite coal.
Manufacturing Program
23-Oct-08 4
Dry-grinding plants for baryte, bentonite, quick lime, colemanite, dolomite, gypsum, graphite, feldspar, limestone, kaoline, magnesite, manganese ore, phosphate, titanium slag and titanium dioxide etc.
Hot gas producers with an outlet temperature of up to 1,000°C which can be operated using traditional heating media and low-calorific gases.
Manufacturing Program
23-Oct-08 9
2-Roller-Mill 3-Roller-Mill
8 different Modulesare available and used in 2-, 3-, 4- and 2+2 or 3+3 Roller-arrangements
All modules are field proven since years
Extended Pedestal
Module:
Roller (without Tyre)
Rocker Arm
Spring Unit (inside)
Pedestal
Module-design-concept - Definition of ‘Module‘
23-Oct-08 10
Cement Raw Material
Coal
Cement and Slag
2M + 2S
3M + 3S
Module-design-concept - 2+2 and 3+3 arrangement
23-Oct-08 15
Part Load Conditions of LOESCHE Mills with 4- Rollers :
~60 % of normal
capacity
~80 % of normal
capacity
23-Oct-08 20
Typical Characteristics
1. Pressure shock resistant to up to 3.5 bar abs.
2. Stop buffers ensure no metal contact between roller and table
3. Individual guidance of Grinding Rollers
4. 2, 3 or 4 roller design (dependent on throughput)
5. Flat grinding table with conical rollers arranged under 15° => shear forces
6. Hydropneumatic spring system
Loesche Coal Mill Properties
23-Oct-08 21
Loesche Central Coal Grinding Plants for PCI
Plant Location/Country Customer Number of mills Throughput % > 0,09 Year
Dillingen,Germany Dillinger Ironworks 2 LM 21.2 D 35 20 1985
Gent, Belgium Sidmar 2 LM 21.2 D 30 10 1986
Kaohsiung, Taiwan China Steel Corp. 2 LM 17.2 D 20 20 1986
Oxelösund, Sweden Svenskt Stal 1 LM 19.2 D 22 15 1986
Taranto, Italy ILVA Spa (RIVA) 3 LM 28.3 D 80 20 1990
Kosice, Slowakia VSZ 1 LM 28.3 D 80 20 1991
Kaohsiung, Taiwan China Steel Corp. 2 LM 20.2 D 27 20 1992
Tubarao, Brazil CST 1 LM 35.3 D 94 20 1994
Hamilton, Canada Stelco Steel 1 LM 26.3 D 65 13 1994
Gijon, Spain Aceralia 2 LM 23.2 D 43,2 15 1995
Vanderbylpark, South Africa Iscor 2 LM 27.2 D 55 20 1995
Cubatao, Brazil Cosipa 2 LM 26.3 D 46,5 15 1995
Baoshan, China Baosteel 2 LM 23.2 D 45 15 1996
Fukuyama, Japan NKK Corporation 2 LM 23.2 D 42 20 1997
23-Oct-08 22
Loesche Central Coal Grinding Plants for PCI
Plant Location/Country Customer Number of mills Throughput % > 0,09 Year
Kaohsiung, Taiwan China Steel Corp. 2 LM 20.2 D 30 20 2001
Tubarao, Brazil CST 1 LM 23.2 D 40 20 2002
Bremen, Germany SWB 1 LM 28.2 D 70 30 2003
Tubarao, Brazil CST 1 LM 35.3 D 94 20 2004
Fos, France Sollac 1 LM 23.2 D 50 30 2005
Sepetiba, Brasil CSA 2 LM 26.3 D 60 20 2006
Taichung, Taiwan China Steel Corp. 2 LM 23.2 D 35 13 2006
Lipetsk, Russia NLMK 2 LM 23.2 D 46 20 2007
Zaporozhye, Ukraine OJSC Zaporozhstal 2 LM 28.2 D 52,5 20 2007
Hamilton, Canada Dofasco 1 LM 28.2 D 42,7 20 2007
Gent, Belgium Sidmar 1 LM 23.2 D 56 30 2007
Lipetsk, Russia NLMK 2 LM 28.3 D 80 20 2007
Dangjing, South Korea Hyundai Steel 4 LM 28.2 D 61 20 2007
Dillingen, Germany Dillinger Ironworks 1 LM 21.2 D 50 30 2008
Taranto, Italy ILVA Spa (RIVA) 1 LM 28.3 D 80 20 2008
St. James Parish, USA NUCOR Corp. 1 LM 28.3 D 90 30 2008
Nizhniy Tagil, Russia PW for Evraz 2 LM 35.3 D 90 20 2008
Nowkuznesk, Russia PW for Evraz 2 LM 35.3 D 90 20 2008
Taichung, Taiwan China Steel Corp. 1 LM 23.2 D 35 13 2008
23-Oct-08 25
Dew Point in Relation to Fuel and Oxygen Content
50
55
60
65
70
75
80
85
90
95
100
3 4 5 6 7 8 9 10 11 12 13
Oxygen Content / % (moist)
Dew
po
int
/ °C
Natural Gas
Blast Furnace Gas
Based on: 11% Water to be evaporated
100°C (212 °F) exit temperature
23-Oct-08 36
LOMA Heater with Multiple Lance Burner for Syngas and Natural Gas System Loesche-Brinkmann