Desiliconization, Desulfurization and [Mn] Increase of Hot Metal with CaO-MnO-CaF<SUB>2</SUB> Flux

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  • HANAO Masahito
    Corporate Research & Development Laboratories, Sumitomo Metal Industries, Ltd.
  • MATSUO Tohru
    Corporate Research & Development Laboratories, Sumitomo Metal Industries, Ltd.

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Other Title
  • CaO-MnO-CaF<SUB>2</SUB>系フラックスによる溶銑の同時脱珪脱硫および[Mn]上昇
  • CaO-MnO-CaF2系フラックスによる溶銑の同時脱珪脱硫および[Mn]上昇
  • CaO MnO CaF2ケイ フラックス ニヨル ヨウセン ノ ドウジ ダツケ

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Description

Experiments were conducted on the hot metal treatment by adding CaO-MnO-CaF2 flux to 2kg carbon-saturated iron at 1350°C.<BR>(1) By adding CaO-MnO-CaF2 flux, desiliconization, desulfurization and [Mn] increase of carbon-saturated iron occurred simultaneously.<BR>(2) From the equilibrium oxygen partial pressure determined by [Si]-(SiO2) and that by [Mn] (MnO), the reaction: [Si]+2 (MnO)=2[Mn]+(SiO2) is considered to have almost reached equilibrium state.<BR>(3) By comparing Ls (=(%S)/[%S]) observed and that calculated using the numerical values of the sulfide capacity of CaO-SiO2-CaF2 slag and the equilibrium oxygen partial pressure, desulfurization is also considered to be in equilibrium state.

Journal

  • Tetsu-to-Hagane

    Tetsu-to-Hagane 83 (12), 779-784, 1997

    The Iron and Steel Institute of Japan

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