Method for recovering metal values from concentrates of sulfide

Details Method for recovering metal values from concentrates of sulfide Method for recovering metal values from concentrates of sulfide

1995-06-07

1997-10-14

Andrews, Melvyn

Specialized metallurgical processes, compositions for use therei

Processes

Free metal or alloy reductant contains magnesium

75744, 423DIG17, C22B 318

Patent

active

056767331

ABSTRACT:
A method of recovering precious metal values from refractory sulfide ores is provided. The method includes the steps of separating clays and fines from a crushed refractory sulfide ore, forming a heap from the refractory sulfide ore, producing a concentrate of refractory sulfide minerals from the separated fines and adding the concentrate to the heap, bioleaching the heap to thereby oxidize iron sulfides contained therein, and hydrometallurgically treating the bioleached ore to recover precious metal values contained therein.

REFERENCES:
patent: 3647261 (1972-03-01), Stenger et al.
patent: 4017309 (1977-04-01), Johnson
patent: 5332559 (1994-07-01), Brierley et al.

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