Dore slag treatment

Details Dore slag treatment Dore slag treatment

1981-12-28

1983-09-13

Vertiz, O. R.

Specialized metallurgical processes, compositions for use therei

Processes

Electrothermic processes

75118R, 75 83, 209166, 423 26, C22B 1104, C22B 100, C01G 500, C01G 700

Patent

active

044040229

ABSTRACT:
A method is disclosed for treating dore slag resulting from smelting of a dore furnace charge, by grinding such slag and then subjecting the obtained pulp to froth flotation in the presence of a suitable frother and collector to produce a precious metals concentrate which is then filtered and returned to the dore furnace with the next charge. The tails from the froth flotation may then be finely ground and subjected to several additional flotation stages to improve recovery of the precious metals, and the entire operation is preferably carried out as a closed loop process so that only the tailings from the rougher flotation are removed and shipped to the smelter.

REFERENCES:
patent: 3627486 (1969-04-01), Nakano
patent: 4029494 (1977-06-01), Kapanen et al.
patent: 4047939 (1977-09-01), Morrison
RI 7562, "Recovery of Copper From Converter Slags by Flotation", Bureau of Mines Report of Investigations/1971, U.S. Dept. of the Interior.

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