Process for suspension smelting of finely-divided sulfidic and/o

Details Process for suspension smelting of finely-divided sulfidic and/o Process for suspension smelting of finely-divided sulfidic and/o

1976-01-08

1978-09-12

Andrews, M. J.

Specialized metallurgical processes, compositions for use therei

Processes

Electrothermic processes

75 23, 75 26, C22B 1502

Patent

active

041134702

ABSTRACT:
A process and device for suspension smelting of finely-divided sulfidic and/or oxidic ores or concentrates are disclosed, wherein a suspension of the finely-divided raw material in an oxygen containing gas is directed downwards as a suspension in a reaction shaft formed jointly by the suspension and a melt below it, in order to oxidize and partially melt the raw material in suspension, whereafter the suspension flow is caused to change its flow direction perpendicularly sidewards so that most of the raw material particles present in the suspension flow impinge against the surface of the accumulated melt in the lower part of the suspension reaction shaft, and the remaining suspension flow is directed into a rising-flow shaft, and the solids are separated. In order to improve the energy economy of the suspension smelting and to increase the capacity, the temperature of the particles falling downwards in the suspension reaction shaft is regulated so that the change in the heat content of the particles impinging against the melt covers the heat quantity required by the endothermal reactions occurring in the melt and together with the change in the heat content of the gas replaces the thermal losses of the furnace.

REFERENCES:
patent: 2506557 (1960-05-01), Bryk et al.
patent: 3790366 (1974-02-01), Bryk et al.
patent: 3892560 (1975-07-01), Nermes et al.
patent: 3900310 (1975-08-01), Kaasila et al.

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