Complex Deoxidation Equilibria of Molten Iron by Aluminum and Calcium

DOI Web Site 被引用文献11件 参考文献21件 オープンアクセス
  • TAGUCHI Kenji
    Graduate Student and JSPS Research Fellow, Graduate School of Engineering, Osaka University
  • ONO-NAKAZATO Hideki
    Course of Materials Science and Engineering, Division of Materials Science and Manufacturing, Graduate School of Engineering, Osaka University
  • USUI Tateo
    Course of Materials Science and Engineering, Division of Materials Science and Manufacturing, Graduate School of Engineering, Osaka University
  • MARUKAWA Katsukiyo
    Center for Advanced Science and Innovation, Osaka University
  • KATOGI Ken
    Heraeus Electro-Nite Japan, LTD.
  • KOSAKA Hiroaki
    TOYO Engineering and Research Center Co., Ltd.

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説明

The influence of oxygen potential in molten steel on the steelmaking reactions, such as desulfurization and denitrogenization by fluxes, is very significant, and it is important to control oxygen content of the molten steel. The use of the strong deoxidizing agents, such as Al and Ca, is effective for decreasing oxygen content of steel, and several researches on the complex deoxidation have been carried out. However, the experimental data do not necessarily accord with the thermodynamically calculated ones, because the reliable thermodynamic data on Ca deoxidation of molten iron are unavailable. In the present study, the complex deoxidation equilibria of molten iron by Al and Ca have been examined at 1873 K. The oxygen activity in molten iron deoxidized by Al and Ca has been measured by an electro motive force (EMF) method at 1873 K. The Al-Ca complex deoxidation equilibria are presented, and the validity is confirmed from the present experimental results and the previous ones in the literature on the complex deoxidation by Al and Ca. The Al-Ca deoxidation equilibria presented in the present study can represent the relationship of Fe-Al-Ca-O system more properly than the previously reported ones.

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