Fe_tO-SiO_2-CaO-MgO 系スラグの MgO 飽和溶解度と Fe^<3+>/Fe^<2+> 平衡

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The solubility limit of magnesia and the ferrous-ferric oxide equilibrium have been measured for the Fe_tO-MgO, Fe_tO-SiO_2-MgO and Fe_tO-SiO_2-CaO-MgO slags in equilibrium of liquid iron at the temperature range from 1550°to 1650℃. The results obtained are summarized as follows ; 1) The solubility limit of magnesia and the ferric oxide content in Fe_tO-MgO slags are represented by the following empirical formulae. log(wt%MgO)=-6000/T+4.21 (±0.05) 1536°-1660℃……(1) log(wt%Fe_2O_3)=3553/T-1.00 (±0.05) 1536°-1660℃……(5) 2) The solubility limit of magnesia in Fe_tO-SiO_2-MgO slags has been established at the temperatures of 1550°, 1600°and 1650℃. The value of ∧=Fe^<3+>/Fe^<2+> in this slags decreases with increasing silica content. 3) The solubility limit of magnesia in Fe_tO-SiO_2-CaO-MgO slags decreases with increasing Fe_tO content and slag basicity, and it becomes almost constant, 6.-8.wt% in the range of basicity higher than 2(=wt%CaO/wt%SiO_2). The value of Λ=Fe^<3+>/Fe^<2+> in these slags increases with increasing the slag basicity and with decreasing Fe_tO content in basic slags.
社団法人日本鉄鋼協会の論文
1981-08-01