Evaluation of the sulphide capacity of Na2O-containing silicate slags using a structural model

This article suggests that the sulphide capacity may be a unique property of slag that can be calculated at a given temperature and composition, even for CaO- or Na2O-containing slags where the amount of dissolved sulphides is significant. A structural model that incorporates sulphide ions (S2-) in the silicate network is used to calculate the sulphide capacity of SiO2-Na2O binary and SiO2-Na2O-MO (M = Ca, Mg, Mn, Fe) ternary systems. This structural model considers the effect of substituting one metal oxide for another in ternary systems and uses only the data for the binary subsystems without any ternary adjustable parameter.

Automated summary

This article proposes that the capacity of slag to hold sulphide may be a unique property that can be calculated based on temperature and composition, even for slags containing significant amounts of dissolved sulphides such as CaO or Na2O. A structural model incorporating sulphide ions (S2-) in the silicate network is used to calculate the sulphide capacity of SiO2-Na2O binary and SiO2-Na2O-MO (M = Ca, Mg, Mn, Fe) ternary systems. The model takes into account the substitution of one metal oxide for another in ternary systems and relies solely on data from the binary subsystems without any ternary adjustable parameters.