Hydrometallurgical process for the recovery of lead, silver and

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

1981-09-29

1982-12-28

Hearn, Brian E.

Chemistry of inorganic compounds

Treating mixture to obtain metal containing compound

Group ib metal

423 95, 423109, 423146, 75 2, 209166, 209167, C22B 300

Patent

active

043661270

ABSTRACT:
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 contains lead, 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.degree.-105.degree. C. and form pure jarosite and zinc sulfate.

REFERENCES:
patent: 2074699 (1937-03-01), Lenher
patent: 3652264 (1972-03-01), Bodson
patent: 3968032 (1976-07-01), Menendey
patent: 3976743 (1976-08-01), Landucci

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