固体鉄と平衡する Fe_tO-M_xO_y(M_xO_y=CaO, SiO_2, TiO_2, Al_2O_3) 2 元系スラグの熱力学

概要

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As a fundamental study of physical chemistry of steelmaking slags, equilibria between hydrogen-water gas mixture and liquid slags contained in solid iron crucibles have been measured for four binary slags of Fe_tO-CaO, Fe_tO-SiO_2, Fe_tO-TiO_2 and Fe_tO-Al_2O_3 systems at 1400℃. From the data, the activity of iron oxide and the ratio of ferrous and ferric iron (∧=Fe^<3+>/Fe^<2+>) were calculated for the composition of slags. In view of ionic theory, a regular solution model for cations was applied to evaluate the thermodynamic properties of complex slags from those of the binary slags. Three binary slags of Fe_tO-SiO_2, Fe_tO-CaO and Fe_tO-TiO_2 systems conformed to the regular solution model within the experimental error except for the extremely FeO rich region. It was confirmed that the oxygen distribution between slag and metal was quantitatively expressed with this model over the wide range of slag composition.
社団法人日本鉄鋼協会の論文
1980-09-01