Process for treating gold-containing sulfide ores

Details Process for treating gold-containing sulfide ores Process for treating gold-containing sulfide ores

1997-02-24

1998-09-08

Bos, Steven

Chemistry of inorganic compounds

Treating mixture to obtain metal containing compound

Group ib metal

423 27, 423 29, 423 45, 423 47, C22B 1100, C22B 100, C22B 300

Patent

active

058041508

ABSTRACT:
The ore which contains gold and at least one of the metals silver, copper, nickel, zinc or iron is calcined at temperatures in the range from 500.degree. to 900.degree. C. with the addition of oxygen-containing gas, thereby producing a metal-oxide-containing solids mixture and a SO.sub.2 -containing exhaust gas. The SO.sub.2 containing exhaust gas is brought in contact with aqueous solution, thereby producing a sulfite-containing solution. The solids mixture from the calcination is cooled to temperatures in the range from 50.degree. to 300.degree. C. and is stirred up with the sulfite-containing solution. Metal oxides are dissolved, and a sulfate-containing solution os formed. In a first separating zone, the sulfate-containing solution is separated from the solids, and either the solids are supplied to a gold leaching or the sulfate-containing solution is subjected to a further treatment for the separation of nonferrous metals.

REFERENCES:
patent: 1824093 (1931-09-01), Meyer
patent: 4619814 (1986-10-01), Salter et al.
patent: 4731114 (1988-03-01), Ramadorai et al.
patent: 5147617 (1992-09-01), Touro et al.
patent: 5147618 (1992-09-01), Touro et al.

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