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Dissolution behavior of alumina in mold fluxes for steel continuous casting

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Abstract

Dissolution of alumina in various mold fluxes for steel continuous casting has been investigated by employing the rotating cylinder method. The weight loss of the rod, the dipping area and the immersed time were measured to determine dissolution rate of Al2O3. The dissolution rate increased with temperature of molten fluxes, the rotating speed of the rod and the addition of MgO, CaF2 and Na2O components in the mold flux. When the Na2O content exceeded 5%mass, the dissolution rate was found to decrease. Intermediate compounds such as CaO·6Al2O3, CaO·2Al2O3 and 2CaO·Al2O·SiO2 formed at the Al2O3/flux interface and formation of three compounds was found to play important roles in the dissolution rate. In conclusion, the dissolution of Al2O3 was controlled not only by the mass transfer in the molten flux also by the formation of intermediate compounds on the interface.

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Authors and Affiliations

  1. Department of Materials Science and Metallurgy, Kyungpook National University, 1370 Sangyeok-dong, Buk-gu, 702-701, Daegu, Korea

    Anh-Hoa Bui & In-Sang Chung

  2. Department of Materials Science and Engineering, Pohang University of Science and Technology, San 31 Hyojadong, Namku, Pohang, Korea

    Hyun-Mo Ha, Youn-Bae Kang & Hae-Geon Lee

Authors
  1. Anh-Hoa Bui
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  2. Hyun-Mo Ha
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  3. Youn-Bae Kang
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  4. In-Sang Chung
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  5. Hae-Geon Lee
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Correspondence to Hae-Geon Lee.

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Bui, AH., Ha, HM., Kang, YB. et al. Dissolution behavior of alumina in mold fluxes for steel continuous casting. Met. Mater. Int. 11, 183–190 (2005). https://doi.org/10.1007/BF03027440

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