Pyrometallurgical process for smelting nickel and nickel-copper

Details Pyrometallurgical process for smelting nickel and nickel-copper Pyrometallurgical process for smelting nickel and nickel-copper

1975-12-22

1977-07-19

Andrews, M. J.

Specialized metallurgical processes, compositions for use therei

Processes

Electrothermic processes

75 24, 75 63, 75 82, C22B 1500

Patent

active

040366367

ABSTRACT:
Process for recovering nickel and nickel-copper from molten smelter-type slags or other highly oxidized sources of nickel and nickel-copper containing 7 to 30 percent by weight of magnetite (Fe.sub.3 O.sub.4). The magnetite in the slag is reduced with carbonaceous materials or other solid reductants such as sulfides, metals or carbides. While the slag is mixed with a fluid cooled, metal-bladed mechanical stirrer, the reductant is reacted with the slag. As a result of stirring the reductant into the slag, the rate of magnetite reduction is highly accelerated. With the reduction, the nickel or nickel-copper (as well as cobalt, if present) separates into a phase as either immiscible metal, a sulfide, or a nickel-copper-iron-sulfide matte, depending upon the initial composition of the slag.

REFERENCES:
patent: 1599424 (1926-09-01), Lellep
patent: 3754891 (1973-08-01), Bryk et al.
patent: 3857700 (1974-12-01), Ammann et al.
patent: 3861660 (1975-01-01), Ammann et al.
patent: 3890139 (1975-06-01), Suzuki et al.

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