The Rate of Nitrogen Desorption from Liquid Iron by Blowing Argon Gas under the Condition of Non-inductive Stirring
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概要
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The nitrogen desorption reaction by blowing argon gas onto the surface of liquid iron containing various oxygen contents has been studied in a resistance furnace. Using a periscopic high temperature lens the Marangoni convection was qualitatively observed in the process of nitrogen desorption. In terms of the experimental results and gas-liquid metal reaction kinetic theory, the procedure of the nitrogen desorption is discussed. The nitrogen desorption from liquid iron under the condition of non-inductive stirring exhibits a 1.5th order dependence with respect to the nitrogen concentration in the melt regardless of oxygen content. The rate of nitrogen desorption is controlled by three mixed rate-controlling steps of gas-and liquid-phase mass transfers and chemical reaction at the gas-metal interface and mainly by the latter two steps. It was deduced that the decrease of the nitrogen desorption rate which accompanies the increment of oxygen concentration was mainly attributed to the attenuation of Marangoni convection and the increase of chemical reaction resistance at the interface in the present study.
- 社団法人 日本鉄鋼協会の論文
- 1999-03-15
著者
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Mukai Kusuhiro
Department Of Materials Science And Engineering Faculty Of Engineering Kyushu Institute Of Technolog
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Jun Z
Graduate Student Department Of Materials Science And Engineering Faculty Of Engineering Kyushu Insti
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Jun Zhu
Graduate Student Department Of Materials Science And Engineering Faculty Of Engineering Kyushu Insti
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Mukai Kusuhiro
Department Of Materials Sciece And Engineering Faculty Of Engineering Kyushu Institute Of Technology
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Mukai Kusuhiro
Department Of Materials Science And Engineering Faculty Of Engineering Kyushu Institute Of Technolog
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