Refined method for copper materials containing copper sulphide minerals

Abstract

A process for refining a raw copper material containing a copper sulfide mineral, e.g., chalcopyrite, by the hydrometallurgical process which can leach copper out of the raw material at a high extraction while suppressing oxidation of sulfur, recover it in the monovalent state by electrolysis and, at the same time, recover a concomitant valuable metal while minimizing production of wastes, e.g., leaching residue, as far as possible. The process for refining a raw copper material containing a copper sulfide mineral, comprising a chlorine-aided leaching step for leaching the raw copper material in the presence of chlorine to produce the leaching product liquor containing the copper ion, copper ion reduction step for reducing the leaching product liquor in the presence of a reductant to produce the reduction product liquor containing the cuprous ion, solvent extraction step for treating the reduction product liquor to produce the stripping product liquor containing the copper and raffinate, copper electrowinning step for electrolyzing the stripping product liquor to produce the electrolytic copper, solution purification step for treating the raffinate to produce the purified solution and iron recovery step for treating the purified solution to recover the iron-containing solid therefrom.

Description

Technical field [0001] The present invention relates to a method for refining copper raw materials containing copper sulfide minerals. More specifically, it relates to a wet refining method for copper raw materials containing copper sulfide minerals mainly containing chalcopyrite. The leaching rate is a refining method for leaching copper and recovering it with monovalent electrolytic copper. At the same time, it also recovers the accompanying valuable metals to minimize waste such as leaching residues. Background technique [0002] At present, most of the world's copper is produced through dry smelting using copper concentrate as a raw material. The above-mentioned copper concentrate is made of chalcopyrite (CuFeS) through physical separation methods such as flotation 2 ), chalcocite (Cu 2 S), bornite (Cu 5 FeS 4 ) And other copper sulfide minerals are concentrated into sulfide minerals. The composition of the above-mentioned copper concentrate mainly depends on the origin of th...

AI Technical Summary

Problems solved by technology

However, SO 2 When blowing in, the concentration of sulfate ions in the leaching solution increases, and the cost of liquid treatment increases

In addition, if copper powder is used, the direct yield of the corresponding product will decrease and the cost will increase

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