Phase Equilibrium between Ni-S Melt and FeO_x-SiO_2 or FeO_x-CaO Based Slag under Controlled Partial Pressures

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To provide thermodynamic data for converting the nickel matte to liquid nickel, an experimental study was conducted in the phase equilibrium between the Ni–S alloy and the FeO<I><SUB>X</SUB></I>–SiO<SUB>2</SUB> or FeO<I><SUB>X</SUB></I>–CaO based slag in a magnesia crucible at 1773 K under controlled <I>p</I><SUB>SO<SUB>2</SUB></SUB> of 10.1 kPa and <I>p</I><SUB>O<SUB>2</SUB></SUB> in a range between 5.1×10<SUP>−3</SUP> and 1.6 Pa by using CO–CO<SUB>2</SUB>–SO<SUB>2</SUB> gas mixtures. The solubility of nickel in these slags at <I>p</I><SUB>O<SUB>2</SUB></SUB> of 1.6 Pa, above which precipitation of a FeO<I><SUB>X</SUB></I>–NiO solid solution was anticipated, was found to be 10.1 and 20.3 mass% for the FeO<I><SUB>X</SUB></I>–SiO<SUB>2</SUB> and FeO<I><SUB>X</SUB></I>–CaO based slags, respectively. The contents of iron, sulfur and oxygen in the nickel melt equilibrated with these slags were 2, 3 and 0.5 mass% for the FeO<I><SUB>X</SUB></I>–SiO<SUB>2</SUB> based slag and 1, 3 and 0.5 mass% for the FeO<I><SUB>X</SUB></I>–CaO based slag, respectively. The dissolutions of nickel and sulfur in the slags were discussed on the basis of distribution ratio and sulfide capacity, respectively.

収録刊行物

  • Materials transactions

    Materials transactions 43(9), 2219-2227, 2002-09-01

    公益社団法人 日本金属学会

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各種コード

  • NII論文ID(NAID)
    10012326030
  • NII書誌ID(NCID)
    AA1151294X
  • 本文言語コード
    ENG
  • 資料種別
    ART
  • ISSN
    13459678
  • NDL 記事登録ID
    6312708
  • NDL 雑誌分類
    ZP41(科学技術--金属工学・鉱山工学)
  • NDL 請求記号
    Z53-J286
  • データ提供元
    CJP書誌  CJP引用  NDL  J-STAGE 
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