Sulfide capacity modeling of FeO_x-MO-SiO₂ (MO=CaO, MnO_x, MgO) melts

In this study, the Reddy-Blander model was applied to predict the sulfide capacity (C_S) values of FeO_x-CaO-SiO₂, FeO _x-MnO_x-SiO₂ and FeO-MgO-SiO₂ ternary slags, which were experimentally studied in the literature within the temperatures between 1,673 and 1,923 K. As expected, sulfide capacity values of the slags increased with increasing temperature and decreased with increasing acidic content. The model was found to be in agree-ment for all slag systems at the temperature range of 1, 773-1,923 K. However, a disagreement occurred when the basic content was relatively high, at 1,673 K for FeO_x-CaO- SiO₂ and FeO-MnO_x-SiO₂ slags. The effect on the C_S of high amounts of Fe⁺³ and Mn⁺³ in the slags is discussed.