Experimental Study on the Phase Diagram of the Fe-O-S System

Critical Assessment and Thermodynamic Modeling of the Fe-O-S System

“…The oxygen content was not measured directly and was obtained by difference, which makes the reported compositions relatively less accurate. The position of the eutectic point suggested by Johto et al [12] is shown in Fig. 5 and 7.…”

“…Johto et al [12] also reported that sulfur was not soluble in wüstite based on equilibration/quenching/EMPA experiments. Hence, sulfur was assumed to be insoluble in monoxide.…”

“…[11,12,[21][22][23][24][25][26][27][28][29] Naldrett [25] determined the iron-wüstite-troilite-liquid (Fe-''FeO''-''FeS''-L) ternary eutectic temperature by melting pyrrhotite, wüstite and iron in silica, iron or silver crucibles. Experiments in silica and iron crucibles gave 915 ± 2°C, while in silver crucibles the eutectic temperature was measured to be 905 ± 2°C.…”

“…Formation of the gas phase is suppressed. Points show the compositions of invariant points reported in studies [11,12,21,25] was absorbed with P 2 O 5 ). The compositions of the liquid phase in equilibrium with magnetite and SO 2 -S 2 gas are plotted in Fig.…”

“…Johto et al [12] heated mixtures of the pure Fe, FeS and [ the liquid phase in equilibrium with solid phases were determined by EMPA analysis. The oxygen content was not measured directly and was obtained by difference, which makes the reported compositions relatively less accurate.…”