An assessment of the Fe-O-Si system

Experimental Study and Thermodynamic Re-optimization of the FeO-Fe2O3-SiO2 System

“…The composition of the FeO-rich slag reported by Greig [8] at the miscibility gap is not in agreement with the crystobalite liquidus measured by Bowen and Schairer [2] and Turkdogan and Bills, [10] and cannot be reproduced by the present and previous models. [35][36][37] The composition reported by Greig [8] is not the true slag liquidus composition at the monotectic temperature since FeO-rich liquid and small amount of SiO 2 -rich liquid were observed in the sample. The cristobalite liquidus compositions reported by Turkdogan and Bills [10] are lower in SiO 2 compared to the calculated liquidus compositions.…”

“…5) compared to previous assessment by Selleby. [35] Figure 6 shows that Wu et al [34] and Jak et al [37] do not reproduce the enthalpy of data by Ban-Ya et al [30] ; these previous assessments appear to give more preference to phase equilibria data. The relationships between oxygen partial pressures versus SiO 2 /[SiO 2 ?…”

“…Metallic iron inclusions were observed in some of the slags and were included in the bulk analysis of slags. The method used to determine liquidus and the presence of iron inclusions in the slag can lead to the underestimation of [35,37] and symbols are experimental data [49] SiO 2 in the liquidus compositions reported by Turkdogan and Bills. [10] …”

“…Wu et al [34] described the FeOSiO 2 slag using the quasichemical model. Selleby [35] and Fabrichnaya and Sundman [36] modelled the liquid phase in the Fe-O-Si system using the sublattice formalism. The liquid solution in these studies [35,36] covered wide range of compositions from liquid metal to molten oxide.…”

“…Selleby [35] and Fabrichnaya and Sundman [36] modelled the liquid phase in the Fe-O-Si system using the sublattice formalism. The liquid solution in these studies [35,36] covered wide range of compositions from liquid metal to molten oxide. The most recent work was carried out by Jak et al [37] in which the slag was described by FeO, FeO 1.5 and SiO 2 components using a modified quasichemical model.…”