1. Investigation & optimization of Greenside coal transfer points in order reduce maintenance requirements Ayanda Nhlapho 2 nd Year University of Cape Town

2. Table of Contents  Project Background  Problem Statement  Objectives  Methodology  Plant Information  Materials Used on Chutes

3. Table of Contents  Wear Liners on Chutes - Wear Liner Selection - Wear Liner Solutions  Liner Results  Liner Solutions - Dead Box liners

4. Table of Contens  Functions of an Effective Chute  Chutes  Conclusion  Recommendations  QUESTIONS

5. Project Background  4-Seam & 5-Seam Plant  Chutes in the Plant  Liners on Chutes

6. Investigation of Transfer Points.

7. Objectives  Find a way to improve Transfer Points in order to reduce maintenance requirements.  Minimize costs.  Increase safety.  Decrease labour hours & downtime.

8. Methodology  Participate in daily maintenance activities  Research on chute & liners  Visits to consultants Martin Engineering & Seaton products  Compare costs of new systems to old systems

9. Plant  5-Seam  4-Seam

10. Crusher

11. Size Separation (Debmar screen)

12. Separation of coal & waste (Spiral)

13. Separation of coal & waste (Cyclone) Overflow (Product) Underflow (Discard) Vortex Finder Tangential Inlet

14. Separation of coal and waste (Drum)

15. Wear liner on chutes  Wear liner is a material used on the interior of a chute as a sacrificial surface. It serves as an easily replaceable sacrificial wear surface to protect the walls of the chute.

16. Materials used on chutes  Mild steel (Chutes) -Low maintenance -Price is relatively low -It is neither brittle or Ductile -Corrosion resistance  Stainless Steel [304] (Liner material) - Abrasion resistance - Antibacterial - Passivation - High strength - Corrosion resistance

17. Materials used on chutes  Ceramic Tiles (Liner material) - Corrosion resistant - Abrasion resistance - Low maintenance - Relatively inexpensive

18. Wear liner selection  Friction Coefficient  Resistance to material adhesion  Resistance to abrasive wear  Resistance to impact

19. Wear liner selection  Resistance to corrosion  Attachment method  Initial cost  Maintenance cost

20. Wear liner selection

21. Liners on chutes

22. Dead Box Liners

23. Dead Box liners

24. Liner results  Greater Savings associated with using Polyurethane  Installation & maintenance is very cheap  6 Times lighter Therefore very safe to work with  Lasts longer than stainless steel  Great reduction in noise levels  Decrease in downtime

25. Liner Results

26. Functions of an effective chute  To feed the receiving conveyor in its direction of travel  To centralize the material load

27. Functions of an effective chute  To minimize the impact on the receiving belt and material degradation - Chute angles - Material buffer Grizzly Bars installed on Chutes

28. Functions of an effective chute  To supply the stream of material at a speed as close as possible to the speed of the receiving conveyor.  To minimize the generation of spillage and the release dust.

29. Functions of an effective chute  Traditional chutes

30. Hood & Spoon

32. Hood & spoon

33. Hood & Spoon  Dust reduction

34. Conclusion  Change all liners to polyurethane  Apply Hood & Spoon

35. Recommendations  Seaton Products  Martin Engineering

36. Acknowledgements  Staff in the training centre  Staff working at the plant  Underground staff

37. QUESTIONS? Questions ?