Phase relations in the Ti-Fe-O ternary system and the equilibrium partial pressures of oxygen have been determined at 1173 K using a thermogravimetric technique in CO-CO2 gas mixtures. The results indicate that upgrading ilmenite to rutile is basically possible and its possibility was confirmed experimentally. The standard Gibbs energy of the reactions at 1173 K were also obtained as follows: Fe(s)+FeTiO3(s)+ 1/2 O2(g)=Fe2TiO4(s), -197.4kJ·mol-1, Fe(s)+TiO2(s)+ 1/2 O2(g)=FeTiO3(s), -208.6kJ·mol-1. Both the activities of magnetite and ulvospinel in the Fe3O4-Fe2TiO4 solid solutions coexisting with metallic iron at 1173 K show negative deviations from Raoult's law.
|Number of pages||15|
|Journal||Metallurgical Review of MMIJ (Mining and Metallurgical Institute of Japan)|
|Publication status||Published - 1995 Dec 1|
ASJC Scopus subject areas
- Metals and Alloys