溶融 FeO-CaO-SiO_2 スラグの表面張力および密度

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The surface tension and density of FeO-CaO, FeO-SiO_2, and FeO-CaO-SiO_2 melts, CaO content up to 40 mol% and SiO_2 up to 50 mol%, in contact with solid iron, have been measured at temperatures from melting points to 1430℃ by the maximum bubble pressure method. Surface tension values of these melts are in the range from 350 to 530 dyn/cm. Surface tension and density of liquid iron oxides show an abnormal behavior, that is, a positive dependence on temperature. The addition of CaO or SiO_2 to iron oxide lead to monotonous decreases of surface tension and density of melts, but the maximum of surface tension is observed in the iso-thermal curve of surface tension of FeO-CaO-SiO_2 ternary melts of constant CaO content at 1400℃. It is found that surface tension values of melts calculated from the equation containing terms of surface tension coefficients and the effect of ferric oxide agree well with the experimental results in the composition range of this experiment. Molar volumes of FeO-CaO and FeO-30CaO-SiO_2 melts show negative deviations from ideal mixture of components.
社団法人日本鉄鋼協会の論文
1976-01-01