| Title |
Thermodynamic Properties of Fet O - Na2 O - SiO2 Slag System |
| Authors |
현도빈(D . B . Hyun); 심재동(J . D . Shim); 김성만(S . M . Kim); 이응조(E . 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. |