Process for the recovery of precious metals from a roaster calci

Details Process for the recovery of precious metals from a roaster calci Process for the recovery of precious metals from a roaster calci

1984-11-29

1986-04-01

Doll, John

Specialized metallurgical processes, compositions for use therei

Processes

Free metal or alloy reductant contains magnesium

75108, 75109, 75115, 75118R, 423 26, 423 27, 423 34, 423 37, 423 41, 423 42, 423 45, C22B 1100

Patent

active

045795894

ABSTRACT:
A process for separating precious metals from a roaster calcine leach residue from a process wherein copper or zinc sulfides are roasted to produce a copper or zinc calcine; the calcine is leached with an aqueous sulfuric acid leaching solution to produce a copper or zinc-containing leaching solution and a roaster calcine leach residue and the copper or zinc-containing leaching solution is separated from the roaster calcine leach residue wherein the process comprises:

REFERENCES:
patent: 3891522 (1975-06-01), McKay et al.
patent: 3902896 (1975-09-01), Borbely et al.
patent: 3974253 (1976-08-01), Snell
patent: 4127639 (1978-11-01), Piret et al.
patent: 4278539 (1981-07-01), Santhanam et al.

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