Process for the recovery of silver from a residue essentially fr

Details Process for the recovery of silver from a residue essentially fr Process for the recovery of silver from a residue essentially fr

1985-03-04

1986-12-30

Doll, John

Specialized metallurgical processes, compositions for use therei

Processes

Free metal or alloy reductant contains magnesium

75101R, 75105, 75115, 75108, 423 27, 423 29, 423 30, 423 31, 423 41, 423 45, C22B 1104

Patent

active

046327010

ABSTRACT:
A process for the recovery of silver from a residue essentially free of elemental sulphur obtained by acidic pressure oxidation leaching or iron-containing sulphidic material which comprises forming a slurry of the residue with lime at a temperature of at least about 80.degree. C. to raise the pH of the slurry to at least about 9. The slurry is maintained at this temperature for from about 0.5 to about 4 hours, and the resultant slurry is subjected to silver recovery treatment.

REFERENCES:
patent: 4053305 (1977-10-01), Smyres et al.
patent: 4070182 (1978-01-01), Genik-Sas-Berezowsky et al.
patent: 4259107 (1981-03-01), Guay
patent: 4405569 (1983-09-01), Dienstbach
patent: 4505744 (1985-03-01), Weir et al.
patent: 4571263 (1986-02-01), Weir et al.
patent: 4571264 (1986-02-01), Weir et al.

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