Hydrometallurgical process for the production of copper

Details Hydrometallurgical process for the production of copper Hydrometallurgical process for the production of copper

C - Chemistry, Metallurgy

25

C

204/69.5

C25C 1/12 (2006.01) C22B 15/00 (2006.01)

Patent

CA 1083524

ABSTRACT A hydrometallurgical process for the recovery of metallic copper from chalcopyrite and other copper-containing materials by ferric chloride oxidation thereof to produce cupric chloride, reduction of the cupric chloride to cuprous chloride, recovery of metallic copper, preferably by electro- lysis, and regeneration of ferric chloride by oxidation with concurrent purge of iron, and sulfate ions and other impurities from the process solution. By combining the ferric chloride oxidation and the ferric chloride regeneration, an advantage- ous reduction in iron content of the process solution is ef- fected along with significant retardation of scaling. The de- sired chloride molal concentration is maintained by the addi- tion to the process solution of sodium chloride, potassium chloride and/or magnesium chloride. Potassium chloride is a preferred source of chloride ions as a means of purging sub- stantially all sulfate ions from the process solution.

217038

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