Method and apparatus for smelting sulfidic ore concentrates

Details Method and apparatus for smelting sulfidic ore concentrates Method and apparatus for smelting sulfidic ore concentrates

1982-01-18

1983-11-08

Andrews, M. J.

Specialized metallurgical processes, compositions for use therei

Processes

Electrothermic processes

75 74, 75 92, 266156, 266182, 266190, C22B 516

Patent

active

044140223

ABSTRACT:
Method and apparatus for smelting a sulfidic ore concentrate such as a copper concentrate in which the concentrate is smelted in an oxidizing atmosphere, the melt is after-treated with reducing gases from a plurality of lances which blow the reducing gases onto the melt in the form of concentrated streams of high kinetic energy and form a metal-rich phase and a slag phase. The improvement of the present invention is concerned with oxidizing the concentrate sufficiently to form an enriched metal matte containing more than 75% by weight metal at a throughput of more than 500 metric tons per day, the oxidizing being carried out in a smelting cyclone operating as a steam generator and at a sufficiently high temperature so that the heat transferred to the cyclone walls is at least 500,000 Kcal/sq. m. of cyclone wall/hr.

REFERENCES:
patent: 2688478 (1954-09-01), Lykken
patent: 3554515 (1971-01-01), Torooka et al.
patent: 3849120 (1974-11-01), Norman
patent: 4027863 (1977-06-01), Aaltunen et al.

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