Process for manufacture of high-chromium iron alloy

Details Process for manufacture of high-chromium iron alloy Process for manufacture of high-chromium iron alloy

1976-01-16

1977-10-11

Rosenberg, P. D.

Specialized metallurgical processes, compositions for use therei

Processes

Free metal or alloy reductant contains magnesium

C22C 3304

Patent

active

040533077

ABSTRACT:
Treatment, with quick lime, of a chromium ore of which the Cr/Fe weight ratio is not less than 1.6 produces a primary slag; reduction of the primary slag with a silicic reducing agent produces a secondary slag in conjunction with a by-produced metal; further reduction of the secondary slag gives rise to a tertiary slag in conjunction with a high-chromium iron alloy of which the combined content of chromium and iron is not less than 90% by weight and the Cr/Fe weight ratio is not less than 4.0; and, as occasion demands, silico-chromium is derived in conjunction with waste slag from the tertiary slag.

REFERENCES:
patent: 2542177 (1951-02-01), Briney
patent: 3158464 (1964-11-01), Chynoweth
patent: 3754900 (1973-08-01), Aukrust

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