Combined process for working up pure and complex copper concentr

Details Combined process for working up pure and complex copper concentr Combined process for working up pure and complex copper concentr

1975-06-04

1976-07-13

Ozaki, G.

Specialized metallurgical processes, compositions for use therei

Processes

Free metal or alloy reductant contains magnesium

75105, 75117, 75118R, 75114, 75120, C22B 1304, C22B 1104, C22B 1508

Patent

active

039691071

ABSTRACT:
A process for working up of a concentrate containing Cu, Zn, and precious metal including at least one of Ag or Au. In a first stage, the concentrate or the concentrate in modified form is leached for hydrometallurgically dissolving out the copper and zinc and leaving a residue containing the precious metal, and the leach liquor is separated from the residue. In a second stage, residue is subjected to a chlorinating sulfatizing roasting, and the roasted residue is leached with a selective solvent for the precious metal, e.g. aqueous NaCl, for dissolving the precious metal out of the residue.

REFERENCES:
patent: 2777764 (1957-01-01), Hedley et al.
patent: 2927017 (1960-03-01), Marvin
patent: 3174848 (1965-03-01), Bruce
patent: 3793429 (1974-02-01), Queneau et al.
patent: 3880732 (1975-04-01), Sardisco

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