| The maximum solubility of MgO was measured in the CaO-SiO₂-Fe_tO-MgO-∑xOy (MxOy = MnO, P₂O_5, Al₂O₃, TiO₂, CaF₂) slag in equilibrium with molten iron in the temperature range of 1550℃ to 1700℃. The effect of ∑MxOy on the MgO solubility and the method for calculating the maximum solubility of MgO using slag composition and temperature were discussed, respectively. Moreover , by applying above results to real operation as a means to prevent an erosion of refractory the optimum MgO content in LD slag was determined and summarized as follows; 1) The maximum solubility of MgO is increased with temperature, and decreased with basicity. The content of Fe_tO affects little on the maximum solubility of MgO. 2)The effect of ∑MxOy on the maximum solubility of MgO preserves a dilution effect due to increase in slag volume, and the amount of CaF₂ itself has an effect to lower the same amount of CaO. |
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