Electrowinning slurry prepared by acid leaching and...

Details Electrowinning slurry prepared by acid leaching and... Electrowinning slurry prepared by acid leaching and...

C - Chemistry, Metallurgy

25

C

53/290, 204/69.5

C25C 1/12 (2006.01) C22B 15/00 (2006.01) C25C 7/00 (2006.01)

Patent

CA 1123372

ABSTRACT Apparatus and process for continuous electrowinning of copper bearing slurries, including an electrowinning cell wherein a slurry composed of a suitable electrolyte and a copper-bearing solid material, is subjected to the simultaneous reactions or dissolving the copper material and plating out elemental copper as a relatively pure copper product. The apparatus and process also includes means to purify the copper-bearing material before passage to the electrowinning cell so as to prevent contamination of the electrolyte in the cell and, also, a means to recover sulfur which is released during the electrowinning and unreacted copper material. The slurry is produced by acid-leaching of copper-bearing solids and adding calcium sulfite to the acid solution to form copper precipitate solids.

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