Solubility of Carbon Dioxide in Molten (BaO+CaO)-(BaF<SUB>2</SUB>+CaF<SUB>2)</SUB> Fluxes and Their Dephosphorization Ability to High Carbon Ferrochromium Liquid Alloy

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  • (BaO+CaO)-(BaF<SUB>2</SUB>+CaF<SUB>2)</SUB>系溶融フラックスの炭酸ガス溶解度と高炭素鉄クロム合金液体に対する脱りん能力
  • (BaO+CaO)-(BaF2+CaF2)系溶融フラックスの炭酸ガス溶解度と高炭素鉄クロム合金液体に対する脱りん能力
  • BaO + CaO BaF2 + CaF2 ケイ ヨウユウ フラックス ノ タ

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Abstract

Solubility of carbon dioxide to melts in the system (BaO+ CaO)-(BaF2+ CaF2) was measured at 1673K by using the thermo-balance method. Itwas found that solubility of CO2 in the melts does not change proportionally with initially mixed BaO content in fluxes, since an reciprocal reaction, (BaO)+(CaF2) = (CaO) + (BaF2) may be established in the melts. Assuming that the equilibrium constant, Kp is 6.7 for the reciprocal reaction, solubility of carbon dioxide in the melt proportionally depends on BaO content in the melts calculated by using Kp = 6.7. It is also shown that experimental works on dephosphorization of Fe-2%C-15%Cr liquid alloy by BaO-CaO-CaF2 and NaF-CaF2 fluxes reported by Inoue et al.can be interpreted with consideration of the reciprocal reaction.

Journal

  • Tetsu-to-Hagane

    Tetsu-to-Hagane 79 (10), 1164-1168, 1993

    The Iron and Steel Institute of Japan

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