(BaO+CaO)-(BaF_2+CaF_2) 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

概要

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Solubility of carbon dioxide to melts in the system (BaO+CaO)-(BaF_2+CaF_2) was measured at 1673K by using the thermo-balance method. It was found that solubility of CO_2 in the melts does not change proportionally with initially mixed BaO content in fluxes, since an reciprocal reaction, (BaO)+(CaF_2)=(CaO)+(BaF_2) may be established in the melts. Assuming that the equilibrium constant, K_p 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 K_p=6.7. It is also shown that experimental works on dephosphorization of Fe-2%C-15%Cr liquid alloy by BaO-CaO-CaF_2 and NaF-CaF_2 fluxes reported by Inoue et al. can be interpreted with consideration of the reciprocal reaction.
社団法人日本鉄鋼協会の論文
1993-10-01