An Alternative Technology for Ilmenite Processing

摘要：

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℃. Extent of chlorination of titanium oxycarbide and oxycarbonitride after iron removal was close to 100％ after 30 min of reaction.

关键词： Ilmenite processing carbothermal reduction chlorination titanium oxycarbide titanium oxycarbonitride

作者: Guangqing Zhang Oleg Ostrovski Andrew Adipuri Mohammad A R Dewan Sheikh A Rezan

作者单位: School of Materials Science and Engineering,the University of New South Wales,UNSW Sydney,NSW2052,Australia

会议类型: 国际会议

会议名称: The 12th World Conference Titanium(第十二届世界钛会 Ti-2011)

会议地点: 北京

会议语种:英文

页码: 106-110

在线出版日期: 2011-06-19（万方平台首次上网日期，不代表论文的发表时间）