Improving recovery of valuable ultra-fine material
A new spiral concentrator focuses on recovering material in the particle size range of 75 microns and smaller, to assist in the recovery of more valuable ultra-fine material so it does not go to waste in the discard.
Spirals are widely regarded as a highly reliable and energy efficient solution and the new design uses a range of technologies to improve the recovery of ultra-fines.
Multotec process engineer Refentse Molehe says the design of its new Multotec UX7 is based on extensive in-house test work, which has led to improvements and around 13% better recovery.
“Much of the testing was conducted on chrome, manganese and iron-ore, but the UX7 spiral can be as easily applied to copper, platinum and other metals,” says Molehe. “This is an exciting development for the sector, as we have seen growing interest from our customers in gaining financial value from material which has traditionally ended up in tailings storage facilities.”
“In addition to its ability to recover ultra-fines, the Multotec UX7 spiral benefits from the various advantages shared by spiral concentrators,” she says. “These include the lower environmental risk and cost due to the absence of chemicals, and the low maintenance of this technology as a result of having no moving parts.”
The company emphasises that its long-term experience in mineral processing related disciplines enables provision of customised, full flow sheet solutions, with each application of the spiral based on an in-depth understanding of the customer’s operating conditions, fine-tuned by extensive testing of material to ensure the optimal result.
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