Process to recover pure copper during purification of zinc...

Details Process to recover pure copper during purification of zinc... Process to recover pure copper during purification of zinc...

C - Chemistry, Metallurgy

22

B

53/289, 204/69

C22B 3/08 (2006.01) C22B 15/00 (2006.01) C25C 1/12 (2006.01)

Patent

CA 2018635

-11- Abstract of the Disclosure A process for recovery of copper from a copper residue obtained during purification of a zinc sulfate solution comprises leaching the copper residue in a concentrated sulfuric acid solution in the presence of an oxidant at a temperature of between 60 and 80°C and separating the solids from the leach solution, electrowinning copper from the leach solution, returning the electrolyte solution to the initial leaching stage to initiate dissolution of the copper residue, and bleeding a portion of the electrolyte solution to reduce the concentration of impurities in the solution.

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