Skip to main content
placeholder image

An alternative technology for ilmenite processing

Conference Paper


Abstract


  • Conventional processing of ilmenites into titania pigment or titanium metal involves upgrading of ilmenite concentrates to synthetic rutile or titania-rich slag followed by high temperature carbochlorination to form titanium tetrachloride. In an alternative technology, titanium oxides are reduced to titanium oxycarbide or titanium oxycarbonitride, which are chlorinated at a much lower temperature. Ilmenites were reduced using a methane-hydrogen-argon gas mixture or graphite. The reducing CH4-H2-Ar gas provided high carbon activity which made reduction/carburisati-on reaction fast and feasible at lower temperature. Methane was also involved in the low-temperature carbothermal reduction of ilmenites in hydrogen in production of titanium oxycarbide or in hydrogen-nitrogen gas in synthesis of titanium oxycarbonitride. Both compounds were chlorinated at 235°C. Extent of chlorination of titanium oxycarbide and oxycarbonitride after iron removal was close to 100% after 30 min of reaction.

Publication Date


  • 2012

Citation


  • Zhang, G., Ostrovski, O., Adipuri, A., Dewan, M. A. R., & Rezan, S. A. (2012). An alternative technology for ilmenite processing. In Ti 2011 - Proceedings of the 12th World Conference on Titanium Vol. 1 (pp. 106-110).

Scopus Eid


  • 2-s2.0-84883117490

Start Page


  • 106

End Page


  • 110

Volume


  • 1

Abstract


  • Conventional processing of ilmenites into titania pigment or titanium metal involves upgrading of ilmenite concentrates to synthetic rutile or titania-rich slag followed by high temperature carbochlorination to form titanium tetrachloride. In an alternative technology, titanium oxides are reduced to titanium oxycarbide or titanium oxycarbonitride, which are chlorinated at a much lower temperature. Ilmenites were reduced using a methane-hydrogen-argon gas mixture or graphite. The reducing CH4-H2-Ar gas provided high carbon activity which made reduction/carburisati-on reaction fast and feasible at lower temperature. Methane was also involved in the low-temperature carbothermal reduction of ilmenites in hydrogen in production of titanium oxycarbide or in hydrogen-nitrogen gas in synthesis of titanium oxycarbonitride. Both compounds were chlorinated at 235°C. Extent of chlorination of titanium oxycarbide and oxycarbonitride after iron removal was close to 100% after 30 min of reaction.

Publication Date


  • 2012

Citation


  • Zhang, G., Ostrovski, O., Adipuri, A., Dewan, M. A. R., & Rezan, S. A. (2012). An alternative technology for ilmenite processing. In Ti 2011 - Proceedings of the 12th World Conference on Titanium Vol. 1 (pp. 106-110).

Scopus Eid


  • 2-s2.0-84883117490

Start Page


  • 106

End Page


  • 110

Volume


  • 1