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Dissolution of solid magnetite in Fe-S-O melt

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Abstract

The dissolution rate of solid magnetite in binary Fe-S and ternary Fe-S-O melts was measured at 1493 K using a rotating magnetite rod of 5 mm in diameter. At rotating speed higher than 52 rpm, the flow of sulfide melt was turbulent, and the effect of natural convection on the dissolution rate was negligible. Magnetite dissolution took place without the evolution of SO2 gas at the rod surface immersed in the interior of the melt. On the other hand, SO2 gas was evolved from a portion of magnetite rod which was in contact with the melt surface. The overall rate of dissolution was controlled by mass transfer through liquid boundary layer on the rod surface, and the dissolution rate of magnetite decreased with increasing oxygen concentration of the sulfide melt. Mass transfer coefficient was between 1.8 × 10−3 and 4.6 × 10−3 cm · s−1 at the rotating speed of 156 rpm, and it decreased with increasing oxygen concentration of the melt.

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Authors and Affiliations

  1. Department of Metallurgy, Kyoto University, 606, Kyoto, Japan

    Z. Asaki (Associate Professor), M. Shiiki, H. Doi (Graduate Student) & Y. Kondo (Professor)

  2. Shunan Works, Nisshin Steel Company, 747, Shin-Nanyo, Japan

    H. Kusuno

  3. Manufacturing Engineering Research Center, Komatsu Ltd., 573, Hirakata, Japan

    H. Kato

Authors
  1. Z. Asaki
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  2. M. Shiiki
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  3. H. Kusuno
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  4. H. Kato
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  5. H. Doi
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  6. Y. Kondo
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Formerly Graduate Student

Formerly Graduate Student

Formerly Graduate Student

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Asaki, Z., Shiiki, M., Kusuno, H. et al. Dissolution of solid magnetite in Fe-S-O melt. Metall Trans B 17, 639–645 (1986). https://doi.org/10.1007/BF02657126

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  • DOI: https://doi.org/10.1007/BF02657126

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