Abstract
By using recently determined experimental data, a new chemical thermodynamic database for the system FeO–Fe2O3–Al2O3–CaO–SiO2 has been developed. Used in conjunction with the FactSage computer package, phase equilibria and thermodynamic properties can be predicted for the wide range of process conditions relevant to non-ferrous metal processing. In the present paper information on the liquidus temperatures and the fraction of solids present at equilibrium, is presented as a function of slag composition and oxygen partial pressure, for silicate smelting slags. These data can be used to determine the conditions for magnetite formation, the effects of silica and lime additions on the liquidus, and the sensitivity of the proportion of solids in the slags to changes in operating temperature and oxygen partial pressure.
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