Use of CO.sub.2 in argon-oxygen refining of molten metal

Details Use of CO.sub.2 in argon-oxygen refining of molten metal Use of CO.sub.2 in argon-oxygen refining of molten metal

1977-01-21

1978-03-21

Rosenberg, Peter D.

Specialized metallurgical processes, compositions for use therei

Processes

Electrothermic processes

75 59, C21C 530

Patent

active

RE0295841

ABSTRACT:
An improved argon-oxygen decarburization process for refining stainless steel comprising injecting a three component gas mixture consisting of oxygen, argon and carbon dioxide into the molten steel during decarburization. [The critical upper limit of CO.sub.2 injection into the melt is defined, below which the carbon removal efficiency is improved.] The preferred flow rate of CO.sub.2 during each of the three principal phases of decarburization is set forth as a function of the flow rate of oxygen and argon, bath temperature and carbon content of the melt.

REFERENCES:
patent: 2855293 (1958-10-01), Savard
patent: 3046107 (1962-07-01), Nelson
patent: 3252790 (1966-05-01), Krivsky
patent: 3397878 (1968-08-01), Holmes
patent: 3649246 (1972-03-01), Fulton
patent: 3706549 (1972-12-01), Knuppel
patent: 3728101 (1973-04-01), D'Entremont

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