Sulphide Capacities of CaO-Al2O3 Slags in the Temperature Range 1773-1848 K.

The sulphide capacities of Ca0-Al 2 03 binary slags of nine different compositions were experimentally determined at 1773 and 1848 using the gas-slag equilibration method. From the results obtained, the sulphide capacities and the molar sulphide capacities have been calculated. The results are compared with data reported in the literature. Comparisons of the experimental C, values with values calculated on the basis of optical basicity concept are presented. The experimental molar sulphide capacities are correlated with Darkens excess stabilities for the system CaO-A1 2 0 3 . A theoretical model for prediction of the sulphide capacity developed in the Department of Theoretical Metallurgy has been used to describe the variation of C s as a function of temperature and composition, in the case of Ca0-Al 2 03 slags.