鉄と鋼
Online ISSN : 1883-2954
Print ISSN : 0021-1575
ISSN-L : 0021-1575
可溶性ガスを利用した脱ガス脱酸機構
松野 英寿菊地 良輝新井 学山田 健三石井 俊夫
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1999 年 85 巻 7 号 p. 514-518

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Experimental and theoretical studies were carried out to understand the mechanism of deoxidation with soluble gas in molten steel in an RH degasser.
A large quantity of soluble gas was dissolved in molten steel, after decreasing the pressure rapidly during degassing, inclusions were trapped by fine bubbles and are then floated and removed. Experiments demonstrated the deoxidation rate was larger than that of conventional argon gas bubbling. A kinetic model for deoxidation in the RH degasser was developed to estimate the deoxidation rates in a vacuum vessel and in a ladle, and to predict the behavior of oxygen content.

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