Phase relations and the equilibrium partial pressures of oxygen in the titanium-iron-oxygen ternary system have been studied in the temperature range of 1173 to 1373 K by means of a thermogravimetric method in a CO-CO2 gas mixtures and X-ray diffraction technique for the quenched samples after the equilibrium experiments. The objective of this study is both to clarify the relation between the phase relations in the Ti-Fe-O ternary system and the equilibrium partial pressures of oxygen, and to discuss the possibility of upgrading natural ilmenite ore to a rutile substitute for extractive metallurgy of titanium. The results are summarized as follows: The phase diagram and isobars of oxygen in the titanium-iron-oxygen ternary system at 1173, 1273 and 1373 K have been determined. From the present results upgrading ilmenite (FeTiO3) to a rutile (TiO2) substitute is possible thermodynamically. Both the activities of magnetite and ulvospinel show negative deviations from Raoult's law in the Fe3O4-Fe2TiO4 solid solutions coexisting with metallic iron at 1173-1373 K.
|出版ステータス||Published - 1997 12月 1|
|イベント||Proceedings of the 1997 126th TMS Annual Meeting - Indianapolis, IN, USA|
継続期間: 1997 9月 14 → 1997 9月 18
|Other||Proceedings of the 1997 126th TMS Annual Meeting|
|City||Indianapolis, IN, USA|
|Period||97/9/14 → 97/9/18|
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