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:: Paste Thickening New or Old Technology?
Dewatering mineral slurries to form paste is presently one of the hottest topics in the minerals industry. The benefits derived from the creation of paste vary from improved throughput in autoclave circuits to environmentally sustainable tailings management via paste backfill systems. Flowsheets incorporating paste formation are easily derived and conceptually simple in that they combine well-documented mineral processing steps such as thickening, filtration and slurry pumping. However, as with many things in mineral processing, the successful application of paste flowsheets to real plants is proving to be a challenge.
An article by Brad Garraway in Outokumpu's electronic newsletter Output (Issue 4, December 2002) primarily focuses on issues surrounding the generation of paste by means of thickening, with a brief reference to paste handling and the role of filtration.
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