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Behavior of impurities in chlorination of reduced Murray Basin ilmenite

Conference Paper


Abstract


  • Technology for titanium metal production includes chlorination of stable oxide TiO2 in the presence of carbon at 800 - 1100 °C to produce TiCl4. The high temperature chlorination is conducted in a fluidized bed and requires a TiO2-enriched, low impurity feed. At these temperatures, impurities in the upgraded feed are also chlorinated which imposes strict limit to the contents CaO, Cr2O3, MnO, MgO2, etc. whose chlorination products may collapse the fluidised bed operation. Titanium oxycarbide/oxycarbonitride compounds can be chlorinated at much lower temperatures (200 - 350 °C). In the low temperature chlorination, impurities either do not chlorinate or chlorinate very slowly. Conversion of titania in synthetic rutile or ilmenite ores into titanium oxycarbide requires 1200 - 1400 °C while synthesis of titanium oxycarbonitride can be implemented at 1150 - 1300 °C. Crucial to the development of a viable alternative technology for processing of titanium minerals is the behaviour of impurities in the ilmenite ore in reduction and chlorination reactions. The primary impurities in Murray Basin ilmenite concentrate and their behavior in reduction under N2 were reported previously. This paper examines the behavior of key impurities in a typical Murray Basin ilmenite ore during carbothermal reduction/nitrodation in a H2-N2 mixture and during chlorination.

Authors


  •   Zhang, Guangqing
  •   Pownceby, Mark (external author)
  •   Fan, Weiyu (external author)
  •   Ostrovski, Oleg (external author)

Publication Date


  • 2012

Citation


  • Zhang, G., Pownceby, M., Fan, W. & Ostrovski, O. (2012). Behavior of impurities in chlorination of reduced Murray Basin ilmenite. 4th High Temperature Processing Symposium (HTP 2012) Victoria: Swinburne University of Technology.

Abstract


  • Technology for titanium metal production includes chlorination of stable oxide TiO2 in the presence of carbon at 800 - 1100 °C to produce TiCl4. The high temperature chlorination is conducted in a fluidized bed and requires a TiO2-enriched, low impurity feed. At these temperatures, impurities in the upgraded feed are also chlorinated which imposes strict limit to the contents CaO, Cr2O3, MnO, MgO2, etc. whose chlorination products may collapse the fluidised bed operation. Titanium oxycarbide/oxycarbonitride compounds can be chlorinated at much lower temperatures (200 - 350 °C). In the low temperature chlorination, impurities either do not chlorinate or chlorinate very slowly. Conversion of titania in synthetic rutile or ilmenite ores into titanium oxycarbide requires 1200 - 1400 °C while synthesis of titanium oxycarbonitride can be implemented at 1150 - 1300 °C. Crucial to the development of a viable alternative technology for processing of titanium minerals is the behaviour of impurities in the ilmenite ore in reduction and chlorination reactions. The primary impurities in Murray Basin ilmenite concentrate and their behavior in reduction under N2 were reported previously. This paper examines the behavior of key impurities in a typical Murray Basin ilmenite ore during carbothermal reduction/nitrodation in a H2-N2 mixture and during chlorination.

Authors


  •   Zhang, Guangqing
  •   Pownceby, Mark (external author)
  •   Fan, Weiyu (external author)
  •   Ostrovski, Oleg (external author)

Publication Date


  • 2012

Citation


  • Zhang, G., Pownceby, M., Fan, W. & Ostrovski, O. (2012). Behavior of impurities in chlorination of reduced Murray Basin ilmenite. 4th High Temperature Processing Symposium (HTP 2012) Victoria: Swinburne University of Technology.