Estimation of sulfide capacities of multicomponent slags using optical basicity

Abstract

An empirical model has been developed based on optical basicity to calculate the sulfide capacity of metallurgical molten slag. The model estimated sulfide capacities agree well with the experimental data for CaO-MgO-FeO-MnO-TiO2-Al2O3-SiO 2-CaF2 multicomponent slags. It is found that the abilities of increasing sulfide capacity in MO-SiO2 (M=Ca, Mg, Fe and Mn) melts follow the order: MnO>FeO>CaO>MgO. Also, substitution of CaO for CaF2 decreases the sulfide capacity and substitution of TiO 2 for SiO2 increases the sulfide capacity. © 2013 ISIJ.