Hydrometallurgical recovery of metal values

Details Hydrometallurgical recovery of metal values Hydrometallurgical recovery of metal values

C - Chemistry, Metallurgy

22

B

53/303, 53/369

C22B 5/02 (2006.01) C22B 1/00 (2006.01) C22B 3/14 (2006.01) C22B 15/00 (2006.01) C22B 23/00 (2006.01) C22B 47/00 (2006.01)

Patent

CA 1093839

ABSTRACT OF THE DISCLOSURE In the hydrometallurgical recovery of metal values from ores and the like in which a metal bearing source is reduced in the presence of at least one additive at temperatures raging from about 500° to about 900° C. and thereafter extracted, the improvement of said process comprises pretreating a portion of process tails from a preceding run with the additive prior to the reducing roast. The additive which is used to pretreat the minor potion of the feed stock may comprise that which is recovered from the roaster offgas and admixed with a portion of the tail stream from the extraction step.

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