Process for the recovery of silver from zinc plant calcines...

Details Process for the recovery of silver from zinc plant calcines... Process for the recovery of silver from zinc plant calcines...

C - Chemistry, Metallurgy

22

B

53/225

C22B 3/06 (2006.01) C01G 5/00 (2006.01)

Patent

CA 1321077

Abstract of the Disclosure: A process for the recovery of silver from zinc calcines, or neutral or low acid leach residues, is disclosed. The process comprises the steps of leaching a silver containing zinc calcine or a neutral or low acid leach residue at atmospheric pressure with an acidic sulphate solution containing from 0.1-20 g/l thiourea at 30-85-C and pH 1-5 to solubilize more than 85% of the silver, and recovering the solubilized silver by adsorption onto activated carbon, or an ion-exchange resin, or by cementation on iron or zinc dust.

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