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.
