Specialized metallurgical processes – compositions for use therei – Processes – Electrothermic processes
Patent
1978-04-27
1979-10-02
Andrews, M. J.
Specialized metallurgical processes, compositions for use therei
Processes
Electrothermic processes
75 21, 75 23, C22B 1500
Patent
active
041697251
ABSTRACT:
A suspension of finely divided impure sulfidic complex or mixed ores or concentrates and air flowing downwards in a reaction zone at a high temperature is first oxidized to vaporize the impurities and then reduced or sulfidized to bring the unvaporized impurities into the gas phase before separating thesolids from the gas phase.
REFERENCES:
patent: 1762867 (1930-06-01), Johannsen
patent: 3459535 (1969-08-01), Vizsolyi et al.
patent: 3790366 (1974-02-01), Bryk et al.
patent: 3892560 (1975-07-01), Nermes et al.
patent: 3948639 (1976-04-01), Nermes et al.
Andrews M. J.
Outokumpu Oy
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