Process and device for suspension smelting of finely divided oxi

Details Process and device for suspension smelting of finely divided oxi Process and device for suspension smelting of finely divided oxi

1976-12-22

1979-02-13

Andrews, M. J.

Specialized metallurgical processes, compositions for use therei

Processes

Electrothermic processes

75 21, 75 23, 75 82, C22B 1500, C22B 2302

Patent

active

041393716

ABSTRACT:
A process for the suspension smelting of finely divided oxide and/or sulfide ores and concentrates, especially iron-rich copper and/or nickel concentrates, in which a suspension of a finely-divided feed mixture in pre-heated air and/or oxygen is fed downwards, at the reaction temperature or above it, first into a suspension oxidation zone for the oxidation and partial smelting of the raw material in suspension, and thereafter into a suspension reduction zone under the suspension oxidation zone for a partial sulfidization of the oxidized raw material, where the suspension flow is finally caused to change its flow direction perpendicularly sidewards so that most of the raw material present in the suspension flow impinges against the surface of the accumulated melt in a melt reaction zone below the suspension reduction zone, wherein an oxidizing gas is injected into the matte phase of the melt reaction zone in order to produce raw metal from the valuable metals present in the melt and the remaining suspension flow and the gases from the melt reaction zone are directed into a rising-flow zone, where the flow is possibly after-sulfidized and cooled and the solid materials are separated from the rising-flow zone flue gases in order to return them to the suspension oxidation zone.

REFERENCES:
patent: 3306708 (1967-02-01), Bryk et al.
patent: 3754891 (1973-08-01), Bryk et al.
patent: 3790366 (1974-02-01), Bryk et al.
patent: 3900310 (1975-08-01), Kaasica et al.

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