Levitskii: Zhurnal Fizicheskoe Khimii 36 ( 1962) 630. Physical Chemistry Iron Steel Making ( 1982) III/39. Honda: ( Heat of mixing of liquid FeO–SiO 2 slag), Proc. Ishizuka: Tetsu To Hagane, ISIJ 71 ( 1985) 846. Jak: 1996, ( Phase equilibrium measurements for the (FeO)–SiO 2 and CaO-(FeO)–SiO 2 systems at metallic iron saturation), Pyrometallurgical Research Centre, School of Engineering, The University of Queensland, Brisbane, Queensland, 4072, Australia,, private communications. Of Mining and Metallurgy, Johannesburg, South Africa, ISBN 1-919783-58X ( 2004) 839.

on Molten Slags, Fluxes and Salts, Capetown, publ.

Pelton: ( Thermodynamic Modeling of the Al2O 3–CaO–CrO–Cr2O 3–FeO–Fe2O 3–MgO–MnO–SiO 2–S System and Applications in Ferrous Process Metallurgy), VII Int. * Correspondence address, Eugene Jak PYROSEARCH – Pyrometallurgical Research Centre School of Engineering The University of Queensland Brisbane, Queensland, 4072, Australia Tel.: +61 7 3365 3666 E-mail: S. The database of the model parameters can be used in conjunction with computer software for Gibbs-free-energy minimisation in order to calculate all thermodynamic properties and any type of phase-diagram section in the FeO – Fe 2O 3 – SiO 2 (Fe – O – Si) system. From these model parameters, the optimised ternary phase diagram of the FeO – Fe 2O 3 – SiO 2 (Fe – O – Si) system was back calculated. The use of physically reasonable models means that the models can be used to predict thermodynamic properties and phase equilibria in composition and temperature regions where experimental data are not available. Sublattice (based upon the compound-energy formalism) and polynomial models were used for the spinel (magnetite) and monoxide (wustite) solid solutions, respectively. The modified quasichemical model was used for the liquid slag phase. The present thermodynamic optimisation was performed as part of the development of a thermodynamic database for the multi-component system Al – Ca – Fe – Mg – O – Pb – Si – Zn the thermodynamic parameters for the Fe – O – Si system therefore were chosen to be consistent not only with the experimental data in this ternary system, but also with the data in higher-order systems. The present optimisation covers the range of oxygen partial pressures from equilibrium with pure oxygen to metal saturation and temperatures from 25 ☌ to above the liquidus. Phase equilibrium and thermodynamic experimental data available in the literature on the FeO – Fe 2O 3 – SiO 2 (Fe – O – Si) system were critically reviewed and used to obtain a self-consistent set of parameters for thermodynamic models for all oxide phases using the FactSage computer package.

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