Mathematical description of the thermodynamic properties of the systems Fe-0 and Fe-O-SiO2

An assessment of the Fe-O-Si system

“…The agreement between calculation and experimental data obtained in the present work is about the same as for the two previous assessments [11,12] of the Fe-O-SiO 2 system. However, the present assessment was more ambitious, covering the entire system and including enthalpy data for the liquid.…”

“…Goel et al [11] in 1980 assessed the Fe-O-SiO 2 system, describing the liquid phase as a solution of the components Fe, FeO, FeO 1.5 , and SiO 2 , using binary interactions between all of them. Björkman [12] in 1985 again assessed the system, describing the liquid phase as an ideal solution with three iron silicate complexes.…”

Thermodynamic reevaluation of the Fe–O system

“…Goel et al [2], Bjorkman [3] and Kowalski and Spencer [4] applied the associated solution model; Sundman [5] developed the ionic two-sublattice liquid model, which was later modified [6] to include neutral FeO 1.5 species on the anion sublattice rather than Fe þ 3 ions on the cation sublattice; and the quasichemical model was used by Wu et al [7] and Decterov et al [8].…”

Effect of Fe/SiO2 Ratio and Fe2O3 on the Viscosity and Slag Structure of Copper-Smelting Slags

“…It has been reported that the fayalite phase precipitates formed in iron-silicate slag at approximately 1473 K increases slag viscosity [3]. At a comparatively low slag temperature of approximately 1370 K, silicate phases containing iron and calcium precipitate that increase slag viscosity even further [4]. When the iron content in the slag is high, the magnetite phase also precipitates in the slag, existing as a fine and diffuse suspended solid in the high-temperature melt [4].…”