Hydrometallurgical process for the recovery of lead, silver,...

Details Hydrometallurgical process for the recovery of lead, silver,... Hydrometallurgical process for the recovery of lead, silver,...

C - Chemistry, Metallurgy

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C01G 49/00 (2006.01) B03B 9/00 (2006.01) B03D 1/02 (2006.01) C01G 9/06 (2006.01)

Patent

CA 1181598

A HYDROMETALLURGICAL PROCESS FOR THE RECOVERY OF LEAD, SILVER AND GOLD, AS WELL AS ZINC, FROM IMPURE JAROSITE RESIDUES OF AN ELECTROLYTIC ZINC PROCESS ABSTRACT OF THE DISCLOSURE The impure jarosite residue of an electrolytic zinc process is leached in a sulfuric-acid-bearing solution in order to produce a leach residue which con- tains lea?, silver and gold and a ferrisulfate-bearing solution and to separate them from each other, whereafter the leach residue is sulfidized and froth- flotated in order to recover a combined concentrate which contains lead, silver and gold, and the ferrisulfate-bearing solution is fed to a ferritic treatment stage, in which ferrisulfate and ferrites react in the presence of ions of alkali and ammonium at 80-105°C and form pure jarosite and zinc sulfate.

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