Reduction smelting process

Details Reduction smelting process Reduction smelting process

1981-02-26

1982-08-17

Lewis, Michael L.

Specialized metallurgical processes, compositions for use therei

Processes

Electrothermic processes

75 3, 75 23, 75 26, 75 73, 75 75, 75 82, C22B 110, C22B 111, C22B 508

Patent

active

043447929

ABSTRACT:
A process for recovering metal values from sulfide ores or concentrates by a fluid bed roast-reduction smelting-converting process which delivers to the reduction smelting furnace either a blend of dead roasted concentrate and green concentrate or a partially roasted concentrate, either feed mixed with a carbonaceous reductant and silica flux, and either feed containing only sufficient sulfur to produce a matte, in which the iron is present as metallic iron, and which has a sulfur deficiency of about 0% to about 25% with respect to base metals, and which is later converted to a low iron matte by blowing and slagging the iron with silica flux.

REFERENCES:
patent: 3198602 (1965-08-01), Wittmann
patent: 3649244 (1972-03-01), Cunningham
patent: 3900310 (1975-08-01), Kaasila et al.
patent: 4266971 (1981-05-01), Schwartz et al.

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