Hydrometallurgical process for the recovery of zinc, copper,...

Details Hydrometallurgical process for the recovery of zinc, copper,... Hydrometallurgical process for the recovery of zinc, copper,...

C - Chemistry, Metallurgy

22

B

53/289, 53/323,

C22B 3/00 (2006.01) C22B 3/08 (2006.01) C22B 15/00 (2006.01) D21C 9/10 (2006.01)

Patent

CA 1094819

ABSTRACT OF THE DISCLOSURE A hydrometallurgical process for the recovery of zinc, copper, and cadmium from their ferrites by treating the ferrites under atmospheric conditions in a sulfuric acid- bearing solution in the presence of potassium, sodium, or ammonium ions at 80-105°C in order to precipitate, as jaro- site, the iron present in the ferrites, separating a jaro- site-bearing solid from the solution, feeding the solution to a neutral leach stage, to which acid and calcine are also fed and from which a solution containing zinc, copper, and cadmium is recovered and feeding the ferrite-bearing solid to the ferrite treatment stage, and recycling a portion of the jarosite-bearing solid obtained from the ferrite treatment stage to the process.

272620

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