Abstract
The present work presents mathematical model for the estimation of sulphide capacities. The sulphide capacity, CS is expressed as urn:x-wiley:01774832:srin01155:equation:srin01155-math-0001where ΔG0 is the standard Gibbs energy change for the reaction, urn:x-wiley:01774832:srin01155:equation:srin01155-math-0002ξ, being a function of both temperature and composition, is characterized by the system under consideration. By optimizing ξ, the sulphide capacities could be estimated as functions of temperature and composition. The slag composition is described using a modified Temkin approach, where complex polymeric ions are considered as dissociated to simple species. The model has been applied to the binary systems CaO‐SiO2, MnO‐SiO2 as well as the CaO‐MnO‐SiO2 ternary system. The results show that reliable predictions of the sulphide capacities can be obtained using the present model.
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