Studies on Ferro-Manganeses Slags (II). On the Apparent Equilibrium of the Si-Redncing Reaction (Part-1)

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  • マンガン鉄鉱滓に関する研究（第2報）フェロマンガン製造時のSiの還元に関する見掛の平衡について（その1）

Abstract

This study was carried out on the relation between the “apparent equilibrium constant” and the composition of slags upon the reaction, 2Mn+SiO2\ ightleftarrows2MnO+Si, in Fe-Mn metallurgy as follows. H-C-Mn of gradually varied Si contents and sulpherless synthetic Fe-Mn slags of gradually varied basicity were used and kept melting for the required time in a graphite crucible in a Tammann electric furnace and then “apparent equilibrium constant” was calculated from the results of the analysis. (1) MgO played the part of basic components as well as CaO. Therefore, in calculating the basicity of the slags, MgO must be added to CaO by moleexchanging. (2) Al2O3 could be regarded the as neutral component in the above conditions. (3) The relation between the “apparent equilibrium constant”, KMn-Sia=(ΣMn)\sqrt[Si]⁄[Mn], and the slags composition was nearly represented by the following equation at 1510°. The concentrations expressed by weight %. logK_Mn-Si^a=-1.257(CaO+1.39MgO)/SiO_2+0.694

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