Method of refining ferro-alloys

Details Method of refining ferro-alloys Method of refining ferro-alloys

1977-10-17

1979-02-13

Rosenberg, P. D.

Specialized metallurgical processes, compositions for use therei

Processes

Electrothermic processes

75 59, C21C 534

Patent

active

041393708

ABSTRACT:
A ferro-alloy, namely ferrochrome or ferromanganese, is refined by being heated to at least 100.degree. C above its melting point to form a bath whereupon oxygen is blown into the melt, below the bath surface, within a protective gas envelope. The rate of oxygen blowing is so chosen that 1% of carbon is oxidized within a period not to exceed about ten minutes, preferably not more than five minutes.

REFERENCES:
patent: 3615349 (1971-10-01), Bleloch
patent: 3708599 (1973-01-01), Krause
patent: 3751242 (1973-08-01), Knuppel
patent: 3773496 (1973-11-01), Kruppel
patent: 3844768 (1974-10-01), Leroy
patent: 3867136 (1975-02-01), Eriksson
patent: 3909245 (1975-09-01), Brotzmann
patent: 4022612 (1977-05-01), Bleloch

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