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Calcium deoxidation equilibrium in liquid iron

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Abstract

Calcium-oxygen equilibrium was studied at 1873 K under normal pressure by the method of immersing a pure iron capsule containing calcium metal into liquid iron, which was equilibrated with CaO-Al2O3 slags in Al2O3 and CaO crucibles. On the basis of these and previous results obtained in the equilibrium experiments between liquid iron and CaO-containing slags, the equilibrium constant,K Ca, for the reaction, CaO (s) =Ca +O, and the first-order interaction parameter,e Ca0 , were estimated. The measured value forK Ca reported in previous experiments, which was found to be significantly different from that calculated from the reliable thermodynamic data, was discussed. Nitrogen distribution ratios between CaO-Al2O3 slags and liquid iron were also measured.

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Authors and Affiliations

  1. Kashima Steel Works, Sumitomo Metal Industries Ltd., Kashima, Japan

    Takashi Kimura

  2. Institute for Advanced Materials Processing, Tohoku University, Sendai, Japan

    Hideaki Suito (Professor)

Authors
  1. Takashi Kimura
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  2. Hideaki Suito
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Formerly Graduate Student, Department of Metallurgical Engineering, Tohoku University

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Kimura, T., Suito, H. Calcium deoxidation equilibrium in liquid iron. Metall Mater Trans B 25, 33–42 (1994). https://doi.org/10.1007/BF02663176

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