FeOを含有するスラグによる高炭素濃度溶鉄中シリコンの酸化反応

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タイトル別名
  • Oxidation Reaction of Silicon in Molten Iron of High Carbon Concentration by FeO Containing Slag
  • FeO オ ガンユウスル スラグ ニ ヨル コウ タンソ ノウド ヨウテツチュ

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抄録

The rate of oxidation reaction of silicon between Fe-4.4%C-Si melt and Li2O-CaO-SiO2-FeO slag has been investigated under the condition of mechanical stirring at 1 300°C. The initial concentrations of FeO in slag, (%FeO)0, and silicon in metal, [%Si]0, were 2.530 and 0.0080.1, respectively. The rotating speed of the stirrer was 50400 rpm.<BR>The activity of silica, aSiO<SUB>2</SUB>, in the slag has also been determined experimentally by measuring the concentration of Si in carbon saturated iron equilibrated with SiO2 in Li2O-CaO-SiO2 slag at PCO=1 atm and 1 300°C.<BR>In the explored concentration range of FeO in the slag, the apparent metal-side mass transfer coefficient of Si, k'si, increases with increasing (%FeO)0, while k'si does not change much with varying [%Si]0. It is found that k'si increases approximately in proportion to the 1/3 power of the rotating speed of the stirrer, but the effect of mechanical stirring on the mass transfer of FeO in the slag is negligible except at lower (%FeO). A mathematical model describing the simultaneous reactions of Si, C and FeO is developed. The reaction mechanism of the present slag-metal reactions is explained with the aid of the mathematical model.

収録刊行物

  • 鉄と鋼

    鉄と鋼 74 (1), 61-68, 1988

    一般社団法人 日本鉄鋼協会

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