Method of rapidly decarburizing ferro- alloys with oxygen

Details Method of rapidly decarburizing ferro- alloys with oxygen Method of rapidly decarburizing ferro- alloys with oxygen

1974-11-27

1979-08-28

Rosenberg, P. D.

Specialized metallurgical processes, compositions for use therei

Processes

Electrothermic processes

75 59, C21C 534

Patent

active

041659805

ABSTRACT:
The invention relates to a method of rapidly decarburizing a high-carbon ro-alloy with oxygen for avoiding an undesirable oxidation of the principal alloying elements, especially chromium or manganese, comprising blowing an oxidizing gas under the surface of a bath of molten ferro-alloy from one or more gas-jacketed nozzles in an amount ranging between substantially 3 and 15 m.sup.3 S.T.P. per metric ton of ferro-alloy with reduction of the carbon content of the ferro-alloy at a rate of about 0.2% to 1%. Comminuted solids, especially particles of oxides of alkaline-earth metals such as powdered lime, may be admixed with the oxidizing gas to prevent the ejection of molten metal from the bath.

REFERENCES:
patent: 1363657 (1920-12-01), Kalling
patent: 3240591 (1966-03-01), Keyser
patent: 3706549 (1972-12-01), Knuppel
patent: 3751242 (1973-08-01), Knuppel
patent: 3771998 (1973-11-01), Knuppel

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