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Copper Concentrator - SAG & Ball Mill Case Study of Biokem

Client was advised to go offline drain this tank as this contamination will cause significant wear. <br>

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Copper Concentrator - SAG & Ball Mill Case Study of Biokem

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  1. Copper Concentrator - SAG & Ball Mill Case Study of Biokem

  2. 1. SAG Mill Fixed Bearing Circuit Tank 6000L Starting ISO: 21/21/17 (out of spec) After Purification ISO: 16/15/12 Water Content: Not tested at start Water Content after: <50ppm VDOPS Purifying Time: 26.9 Hrs

  3. Comment: Client had sensibly drained the contaminated oil and deployed a small centrifuge that helped. VDOPS further reduced the moisture and significant larger debris was captured as shown.

  4. 2. SAG Mill Floating Bearing Circuit Tank 4500L Comment: Filtration was commenced on this oil however the oil did not respond normally. It had a very dark appearance and smelled ‘burnt’. A sample was taken and this oil displayed a ‘cake of fines’.

  5. Action: Client was advised to go offline drain this tank as this contamination will cause significant wear. A cake of fines is a very high concentration of silt size particles and/or additive pack ingredients that build up on the patch membrane obscuring all other contaminants.

  6. If the additive package breaks down in this way and drops out of solution it is no longer performing its intended function. The oil that was removed was dehydrated and left to be filtered over the next two weeks with depth filter media to remove these sub-micron contaminants. Afterwards an additive pack will be needed to restore this oil.

  7. 3. Outside Bulk Tank 5000L Operating outside and beyond ISO 4406 spec Starting ISO: 23/22/17 (out of spec) After Purification ISO: 21/17/15 Water Content: 5000ppm (out of spec!) Water Content after: 100ppm VDOPS Purifying Time: 20.3 Hrs

  8. Comments: A huge 25L of water was removed and lubricant could then be returned to service. The image shows the VDOPS collection chamber extracting water from the emulsified oil. No free water was present.

  9. Summary In total 24,500L of oil was purified to better than target specification in 114.2 Hrs. The outcome was returning the plant to operation with a minimum of downtime and without discarding any lubricant resources and associated costs.

  10. The client was so impressed with our response service and professionalism; they have requested a regular 90 day service agreement to manage the oil cleanliness.

  11. To know more information, visit us http://www.biokem.com.au/

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