Process for the treatment of complex lead-zinc concentrates

Details Process for the treatment of complex lead-zinc concentrates Process for the treatment of complex lead-zinc concentrates

C - Chemistry, Metallurgy

22

B

53/289

C22B 3/00 (2006.01)

Patent

CA 1076367

PROCESS FOR THE TREATMENT OF COMPLEX LEAD-ZINC CONCENTRATES ABSTRACT Sulfide concentrates containing metals such as lead, zinc, copper and silver are treated to selectively recover these metals in high yields in a process wherein the concentrate is sequentially leached or extracted with sulfuric acid in the presence of oxygen; lime in the presence of sulfide ion; and ferric chloride. The leach solutions resulting from each extraction may then be treated to recover metals in their elemental state. The process does not produce sulfur oxides.

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