マットの酸素富化溶錬の熱力学

DOI Web Site 被引用文献1件 参考文献22件
  • 板垣 乙未生
    正会員　工博　東北大学教授　素材工学研究所
  • ROGHANI Ghasem
    Dr., Research Fellow, Department of Mining, Minerals & Materials Engineering, University of Queensland, Brisbane QLD 4072, Australia
  • FONT Jonkion M.
    Research Student, Institute for Advanced Materials Processing, Tohoku University

書誌事項

タイトル別名
  • Thermodynamic Study of Matte Smelting with Oxygen or Oxygen-enriched Air.
  • マット ノ サンソ フカ ヨウレン ノ ネツリキガク

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抄録

For thermodynamically understanding copper or nickel smelting processes using oxygen or oxygen-enriched air as a blowing gas, a series of the authors' experimental studies of the phase equilibrium and distribution of minor elements between the copper matte or the nickel matte and the FeOX-SiO2 base slag under the SO2 partial pressures of 0.1, 0.5 and 1 atm at 1,300 °C are reviewed in this paper. The solubility of copper was found to be independent of pSO2 when the matte grade was specified and it was considered that this behavior was ascribable to the constancy of (pO2 /pS2 ) against pSO2 . On the other hand, it was clarified that the solubility of nickel in the slag increased with increasing pSO2 at a given matte grade. The difference in the dissolution behavior between copper and nickel was considered to be ascribable to the difference in the chemical formulas of the mono-metallic sulfides in which one copper atom combines with 1/2 sulfur atom while one nickel atom with 2/3 sulfur atom. When the distribution ratio of a minor element, X, between the slag and matte phases was defined as LXs/m = (mass % X in slag)/{mass % X in matte}, LXs/m for arsenic, antimony and bismuth at a given matte grade increased with increasing pSO2. This behavior was explained reasonabley by assuming a mutual reaction between a metallic species in the matte and an oxidic species in the slag. On the other hand, the distribution ratio of silver at a given matte grade was almost constant against pSO2. This was considered to be ascribed to the sulfidic species of AgS0.5 prevailing in the matte phase as well as the constancy of (pO2 /pS2 ) against pSO2.

収録刊行物

  • 資源と素材

    資源と素材 115 (4), 203-211, 1999

    一般社団法人 資源・素材学会

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