Scraper Conveyors - kmg.agh.edu.pl · KULINOWSKI & KASZA AGH DEPARTMENT OF MINING, DRESSING AND...

2018-06-18

1

www.kmg.agh.edu.pl CONVEYORS [email protected]

© KULINOWSKI & KASZA AGH DEPARTMENT OF MINING, DRESSING AND TRANSPORT MACHINES AGH TEL +48126173092 / FAX +48126335162

Department of Mining, Dressing and Transport Machines AGH University of Science and Technology

Scraper Conveyors

CONVEYORS

Piotr Kasza Ph. D., Eng. B-2, room 6 Piotr Kulinowski Ph. D., Eng. B-2, room 6



Scraper Conveyors

Scraper conveyors – belong to the group of string

conveyors. Used to transport bulk materials in many branches

of industry.

Inside stationary trough moves string with attached in equal

distances scrapers. Bulk material is conveyed by scrapers on

the string.

General classification of those conveyors is as follows:

- with open trough,

- with closed trough.

2018-06-18

2



Scraper Conveyors

Basic advantages:

- simple construction,

- heavy conditions resistance,

- possibility of hot materials transport (even to 700°C),

…and disadvantages:

- great resistances to motion,

- strong abrasive wear of trough, scrapers and strings,

- limitation of types of transported materials (self-lubricating

ones).



Scraper Conveyors - Open trough conveyors

Transport of: slag, ash, coke.

Application: boilers, power stations, ironworks.

2018-06-18

3




Submerged scraper conveyor (SSC for short) is applied in bottom slag handling for coal-

fired power plant boilers, it is composed of upper and lower trough, the slag falls into the

water of the upper trough, and then is conveyed to next store or conveyor system by

chain and scraper after enough cooling. SSC can be applicable to 25~100MW unit, the

max transporting length can be up to 100 meters.



Scraper Conveyors - Ash Handling for Coal-Fired Power Plants

2018-06-18

4



Scraper Conveyors - Ash Handling for Coal-Fired Power Plants




Transport of: grain, wheat, corn,

peat, dung, sawdust.

Application: agriculture, farming,

stock raising, wood.

2018-06-18

5



…and other application, snow loading.





…and another application, output transport on roadheader.

…more about mining in further part…

2018-06-18

6



Scraper Conveyors - Strings with scrapers



Chain


2018-06-18

7



Scraper Conveyors



www.kmg.agh.edu.pl


2018-06-18

8






U Chain Elevator

2018-06-18

9



Scraper Conveyors



Tube Chain Conveyor

2018-06-18

10



Scraper pipe conveyor

1 – Drive station 2 – String with scrapers 3 – Pipe 4 – Bend 5 – Tension station 6 – Spring 7 – Directional station



TUBE CHAIN CONVEYORS - String and Scraper

Material of scraper:

Cast Iron

Nylon

Stainless steel

UHMW polyethylene

String: Cable or chain

2018-06-18

11



Scraper Conveyors - Closed trough conveyors

Driving wheel



TUBE CHAIN CONVEYORS - Sprocket

2018-06-18

12



TUBE CHAIN CONVEYORS - Sprocket




Tension station

kettenradanimation2.gif

2018-06-18

13




Directional station




2018-06-18

14







2018-06-18

15







2018-06-18

16







2018-06-18

17



Cullet transport




Cleaning systems

2018-06-18

18



TUBE CHAIN CONVEYORS - Parameters

Delivery capacity: 0.4-300 m3/h

Delivery distance: 60-80m (horizontal); 40-50m

(vertical)

Power: 0.2-15KW

Chain speed: 0.02 – 0.54 m/s



TUBE CHAIN CONVEYORS - Advantages and disadvantages

Advantages:

Easy to configuration paths for

transporting material;

Simple design;

The ability to monitor system operation;

Quiet work;

Possibility to change the temperature of

the raw material during transportation;

Possibility of transporting the materials

to high temperatures (approx. 700 °C).

Low drive power;

ATEX zones possible;

Disdvantages:

High resistance to motion;

Slow transport compared with other

types of conveyors (lower capacity);

High precision of the working parts;

Rapid wear of pipes and scrapers;

Difficulty in the case of repair failure

due to the closed casing;

2018-06-18

19



Scraper Conveyors for Coal Industry



Longwall system

2018-06-18

20



Longwall system



Longwall system

1 – drive unit

2 – tail end

3 – line pan

4 – connecting pan

5 – chain

6 – scraper

7 – slide plate /top, bottom/

2018-06-18

21





Construction of typical armoured chain conveyor

SHEARER

2018-06-18

22



Scraper Conveyors



Scraper Conveyors

2018-06-18

23



Scraper Conveyors



Scraper Conveyors

2018-06-18

24



Scraper Conveyors



Scraper Conveyors

2018-06-18

25



Scraper Conveyors



Scraper Conveyors

2018-06-18

26



Scraper Conveyors



Scraper Conveyors

2018-06-18

27



Scraper Conveyors

Belt conveyor

Beam stage loader BSL

Armoured face conveyor AFC

Roof supports

Longwall shearer



Longwall Top Coal Caving

2018-06-18

28



Hydraulic roof support



The coal is cut by a rotating drum with

bits called a shearer that moves along

the length of the face in front of the

chocks, disintegrating the coal. The coal

is then removed from the coal face by a

moving chain of AFC (armoured face

conveyor) to the main gate. Here it is

loaded onto a belt conveyor and

transported to the surface.

As the shearer removes the coal, the

chocks move forward into the newly

created cavity. As mining progresses

and the entire longwall progresses

through the seam, the cavity behind the

longwall, known as the goaf, increases.

This goaf collapses under the weight of

the overlying strata. The consequence

is crump.

2018-06-18

29



Scraper Conveyors

Destroyed roof supports after crumps in one of the polish mine



Scraper Conveyors

2018-06-18

30



Scraper Conveyors

Armoured Face Conveyor AFC



Scraper Conveyors

Beam Stage Loader BSL

2018-06-18

31



Scraper Conveyors

AFC and BSL crossing



Scraper Conveyors

Drive

2018-06-18

32



Scraper Conveyors



Scraper Conveyors

Drive with Fluid coupling

2018-06-18

33



Scraper Conveyors

Fluid coupling



Scraper Conveyors

Drive with CST (controlled start transmission)

2018-06-18

34



Scraper Conveyors

Additional Equipment



Scraper Conveyors

2018-06-18

35



Scraper Conveyors



Scraper Conveyors

2018-06-18

36



Scraper Conveyors

Scraper Conveyors - kmg.agh.edu.pl · KULINOWSKI & KASZA AGH DEPARTMENT OF MINING, DRESSING AND...

Documents

Transcript of Scraper Conveyors - kmg.agh.edu.pl · KULINOWSKI & KASZA AGH DEPARTMENT OF MINING, DRESSING AND...