Assessment of Aluminum-Oxygen Equilibrium in Liquid Iron and Activities in CaO-AI2O3-SiO2 Slags

Abstract

The equilibrium constant KAl for the reaction: [formula omitted] and the first-order interaction parameter [formula omitted] were estimated at 1 873 K by using the values for the contents of oxygen, aluminum and other components obtained in slag-metal equilibrium experiments and those for activity of alumina, along with the respective interaction parameters. The values for log KAl and [formula omitted] were found to be 13.3 ± 0.59 and-6.83 ± 0.07, respectively. Activities of slag components in the CaO-AI2O3-SiO2 system were also evaluated at 1 873 K from the values for nitride and sulfide capacities coupled with nitrogen and sulfur distribution ratios. These results were discussed by comparing with previous values. © 1994, The Iron and Steel Institute of Japan. All rights reserved.