발간논문

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Vol.23, No.3, 193 ~ 202, 1985
Title
Thermodynamic Properties of Fet O - Na2 O - SiO2 Slag System
현도빈D . B . Hyun, 심재동J . D . Shim, 김성만S . M . Kim, 이응조E . C . Lee
Abstract
As a fundamental study on the physicochemical properties of soda-bearing slags, an equilibrium measurement between hydrogen/water vapour mixtures and the soda-bearing stags of Fe_tO-Na₂O-SiO₂ternary system contained in solid iron crucible at 1400℃ has been made. From the results obtained, the activity of iron oxide and the ratio of Ferric to ferrous in (Fe^(3+)/Fe^(2+)) have been determined as a function of slag composition. The activity of iron oxide in this slag markedly deviated to the direction of N_(Na₂)O/N_(SiO₂)＝⅔. In the view of ionic theory, the approximate validity of regular solution model for cations was examined to evaluate the thermodynamic properties of this ternary slag containing Na₂O. It was confirmed that the regular solution model was satisfied within experimental error except for extremely FeO rich region.
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