Process of treating residues from the hydrometallurgical...

Details Process of treating residues from the hydrometallurgical... Process of treating residues from the hydrometallurgical...

C - Chemistry, Metallurgy

25

C

53/20, 53/324, 2

C25C 1/16 (2006.01) C22B 3/00 (2006.01) C22B 3/04 (2006.01) C22B 3/08 (2006.01) C22B 3/44 (2006.01) C22B 7/00 (2006.01) C22B 7/02 (2006.01) C22B 19/00 (2006.01) C22B 19/20 (2006.01) C22B 19/30 (2006.01) C22B 21/00 (2006.01) C22B 41/00 (2006.01) C22B 58/00 (2006.01) C25C 1/14 (2006.01) C25D 1/16 (2006.01)

Patent

CA 1324977

ABSTRACT OF THE DISCLOSURE: In conjunction with an electrolytic production of zinc, the residues are processed so that the residue is leached with cell acid at a temperature from 50 to 100° C in such a manner that a concentration of free acid from 10 to 100 g/l is obtained at the end of the leaching. The undissolved matter is separated from the suspension, the separated matter is supplied to the acid leaching step performed in the electrolytic production of zinc, fine- grained metallic iron is added to the solution from which the undissolved matter has been removed so that copper is precipitated. The precipitated copper is separated and the liquid phase from which the precipitated copper has been separated is supplied to one of the stages which precede the precipitation of iron in the electrolytic production of zinc.

547510

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