Im an Engineering graduate from South Africa, I was impressed with the topics being discussed on this forum. I have been enroled on the Anglogold Engineer in Training programme, I have 5 months on the programme and currently im in Mali at the Yatela Openpit Gold plant.
We are experiencing problems with our sculping screen, the screen is developing cracks on the side plates and the rubber sring failures. This ussually happens after a heavy rainfall, the material becomes clayish and tends to build up underneath the feed chute, it takes a minimum of 10 min to fill up the screen.
The will be subjected to overload conditions, resulting in the rubbers failure, its only the back rubbers that fail and breaks.
The design specifications for the screen are as follows:
1. Design feed rate 600tph (500tph fresh feed and 100tph re-circulating from the cone crusher).
2. Top deck apertures were 70mm square and bottom 44mm square (both polyurethane).
3. Commissioning report attached. Stroke was 11.55mm at 80% motor weight setting. Max stroke would therefore be 14.4mm at 100% setting, at 740rpm which equates to 4.5G’s (3.6G’s at 80% setting).
4. Screen deck (aperture) is 2440 x 5490mm, but overall length is 6800mm (610mm is blank feed section and 704mm is blank discharge).
5. type of screen cloth - Poly
6. Rubber buffer stiffness is 50kg/mm. Design load is 1500kg per buffer and maximum load is 2600kg per buffer. Screen mass is 15000kg, therefore 10 buffers are required.
4 at the back, 2 each side and 6 in the front, 3 each side
7. Screen was designed for 500tph -35mm product.
8. Angle is 15 degrees.
Can you please advise us, how can we solve this problem. ■
Sculping Screen
Im an Engineering graduate from South Africa, I was impressed with the topics being discussed on this forum. I have been enroled on the Anglogold Engineer in Training programme, I have 5 months on the programme and currently im in Mali at the Yatela Openpit Gold plant.
We are experiencing problems with our sculping screen, the screen is developing cracks on the side plates and the rubber sring failures. This ussually happens after a heavy rainfall, the material becomes clayish and tends to build up underneath the feed chute, it takes a minimum of 10 min to fill up the screen.
The will be subjected to overload conditions, resulting in the rubbers failure, its only the back rubbers that fail and breaks.
The design specifications for the screen are as follows:
1. Design feed rate 600tph (500tph fresh feed and 100tph re-circulating from the cone crusher).
2. Top deck apertures were 70mm square and bottom 44mm square (both polyurethane).
3. Commissioning report attached. Stroke was 11.55mm at 80% motor weight setting. Max stroke would therefore be 14.4mm at 100% setting, at 740rpm which equates to 4.5G’s (3.6G’s at 80% setting).
4. Screen deck (aperture) is 2440 x 5490mm, but overall length is 6800mm (610mm is blank feed section and 704mm is blank discharge).
5. type of screen cloth - Poly
6. Rubber buffer stiffness is 50kg/mm. Design load is 1500kg per buffer and maximum load is 2600kg per buffer. Screen mass is 15000kg, therefore 10 buffers are required.
4 at the back, 2 each side and 6 in the front, 3 each side
7. Screen was designed for 500tph -35mm product.
8. Angle is 15 degrees.
Can you please advise us, how can we solve this problem. ■