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Carbothermal reduction of ilmenite concentrates and synthetic rutile in different gas atmospheres

Journal Article


Abstract


  • The paper discusses carbothermal reduction of primary, secondary and HYTI70 ilmenite concentrates and synthetic rutile. Fine powders of graphite and ilmenite or synthetic rutile sample were uniformly mixed and pressed into pellets. Isothermal and temperature programmed reduction was studied in hydrogen, argon and helium in a tube reactor with continuously flowing gas. Main phases in primary and secondary ilmenite concentrates were ilmenite FeTiO3 and pseudorutile Fe2Ti3O9, while HYTI70 also contained rutile. Formation of titanium oxycarbide from ilmenite concentrates in hydrogen started at 1000°C and was close to completion at 1300°C for 300 min; in inert gases, it started at 1200°C and was not complete at 1300°C for 300 min. The rate of conversion of titania to titanium oxycarbide in hydrogen decreased with increasing grade of ilmenite concentrate. In inert gas, reduction of synthetic rutile was faster in comparison with ilmenite concentrates.

Publication Date


  • 2010

Citation


  • Dewan, M., Zhang, G., & Ostrovski, O. (2010). Carbothermal reduction of ilmenite concentrates and synthetic rutile in different gas atmospheres. XXV International Mineral Processing Congress 2010, IMPC 2010, 2, 1521-1532.

Scopus Eid


  • 2-s2.0-84874371156

Web Of Science Accession Number


Start Page


  • 1521

End Page


  • 1532

Volume


  • 2

Abstract


  • The paper discusses carbothermal reduction of primary, secondary and HYTI70 ilmenite concentrates and synthetic rutile. Fine powders of graphite and ilmenite or synthetic rutile sample were uniformly mixed and pressed into pellets. Isothermal and temperature programmed reduction was studied in hydrogen, argon and helium in a tube reactor with continuously flowing gas. Main phases in primary and secondary ilmenite concentrates were ilmenite FeTiO3 and pseudorutile Fe2Ti3O9, while HYTI70 also contained rutile. Formation of titanium oxycarbide from ilmenite concentrates in hydrogen started at 1000°C and was close to completion at 1300°C for 300 min; in inert gases, it started at 1200°C and was not complete at 1300°C for 300 min. The rate of conversion of titania to titanium oxycarbide in hydrogen decreased with increasing grade of ilmenite concentrate. In inert gas, reduction of synthetic rutile was faster in comparison with ilmenite concentrates.

Publication Date


  • 2010

Citation


  • Dewan, M., Zhang, G., & Ostrovski, O. (2010). Carbothermal reduction of ilmenite concentrates and synthetic rutile in different gas atmospheres. XXV International Mineral Processing Congress 2010, IMPC 2010, 2, 1521-1532.

Scopus Eid


  • 2-s2.0-84874371156

Web Of Science Accession Number


Start Page


  • 1521

End Page


  • 1532

Volume


  • 2