Phase Equilibria and Thermodynamic Studies in the System CaO−FeO−Fe2O3−SiO2

Abstract

Phase equilibria and thermodynamic properties of the system CaO−FeO−Fe2O3−SiO2 were studied at 1450° and 1550°C, over a range ofpO2 from 1 to about 10−11 atm. Isothermal phase diagrams and activity-composition diagrams were constructed for 0, 5, 10, 20, and 30 wt pct SiO2 sections. The data are applicable to further understanding the behavior of simple BOF steelmaking slags.