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Reduction of titania and ilmenite by methane containing gas

Conference Paper


Abstract


  • Reduction of titania and ilmenite ores by CH4-H2-Ar gas mixture was investigated in a laboratory fixed bed reactor. Titania was reduced to titanium oxycarbide in the temperature range of 1200-1500°C. At 1400-1500°C, the extent of reduction of titania to titanium oxycarbide achieved more than 85% in 90 min. Optimum conditions for titanium oxycarbide synthesis by reduction of titania include temperature in the range of 1300-1450°C, methane content 8 vol% and hydrogen content above 35 vol%. Ilmenite ore was reduced by CH2-H2-Ar gas mixture to metallic iron and titanium oxycarbide. Metallic iron catalyzed methane cracking and solid carbon deposition. Titanium oxycarbide formed at temperatures as low as 950°C. The optimum temperature for reduction of ilmenite is 1200°C and the optimum methane content is 8 vol%. Increase in hydrogen content increased both rate and extent of reduction. With 5 vol% CH4-75 vol% H2-20 vol% Ar gas mixture, the reduction of ilmenite completed in 60 min. Reduction of titanium oxides to oxycarbide with following chlorination may be an efficient alternative technology for processing of titanium minerals.

Publication Date


  • 2001

Citation


  • Ostrovski, O., & Zhang, G. (2001). Reduction of titania and ilmenite by methane containing gas. In TMS Annual Meeting (pp. 89-103).

Scopus Eid


  • 2-s2.0-0035780715

Start Page


  • 89

End Page


  • 103

Abstract


  • Reduction of titania and ilmenite ores by CH4-H2-Ar gas mixture was investigated in a laboratory fixed bed reactor. Titania was reduced to titanium oxycarbide in the temperature range of 1200-1500°C. At 1400-1500°C, the extent of reduction of titania to titanium oxycarbide achieved more than 85% in 90 min. Optimum conditions for titanium oxycarbide synthesis by reduction of titania include temperature in the range of 1300-1450°C, methane content 8 vol% and hydrogen content above 35 vol%. Ilmenite ore was reduced by CH2-H2-Ar gas mixture to metallic iron and titanium oxycarbide. Metallic iron catalyzed methane cracking and solid carbon deposition. Titanium oxycarbide formed at temperatures as low as 950°C. The optimum temperature for reduction of ilmenite is 1200°C and the optimum methane content is 8 vol%. Increase in hydrogen content increased both rate and extent of reduction. With 5 vol% CH4-75 vol% H2-20 vol% Ar gas mixture, the reduction of ilmenite completed in 60 min. Reduction of titanium oxides to oxycarbide with following chlorination may be an efficient alternative technology for processing of titanium minerals.

Publication Date


  • 2001

Citation


  • Ostrovski, O., & Zhang, G. (2001). Reduction of titania and ilmenite by methane containing gas. In TMS Annual Meeting (pp. 89-103).

Scopus Eid


  • 2-s2.0-0035780715

Start Page


  • 89

End Page


  • 103