Method of refining molten chrome steel

Details Method of refining molten chrome steel Method of refining molten chrome steel

1992-04-09

1994-06-28

Andrews, Melvyn J.

Specialized metallurgical processes, compositions for use therei

Processes

Producing or treating free metal

C21C 706

Patent

active

053243420

ABSTRACT:
Mixed gas of nonoxidizing gas and oxygen is blown into molten chrome steel in a vessel. The molten chrome steel is stirred by the gas and is decarbonized by the oxygen in the gas while being stirred. After the carbon potential in the molten chrome steel has been lowered, the pressure inside the vessel is reduced and the nonoxidizing gas alone is blown as the gas. Bubbles of the gas blown into the molten chrome steel become large on account of reduced pressure and exhibit sufficient stirring function. Consequently, the molten chrome steel is effectively stirred and the decarbonizing reaction is prompted.

REFERENCES:
patent: 4174212 (1979-11-01), Bauer et al.
patent: 4410359 (1983-10-01), Bishop, Jr.
patent: 4426224 (1984-01-01), Shimme et al.
patent: 4514220 (1985-04-01), Tommaney et al.
patent: 4615730 (1986-10-01), Tommaney
patent: 5047081 (1991-09-01), Tanabe et al.

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