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Reduction of ilmenite concentrates by methane containing gas, Part II: Effects of preoxidation and sintering

Journal Article


Abstract


  • Reduction of preoxidized and sintered ilmenite concentrates by a CH4-H2-Ar gas mixture was investigated in a laboratory fixed bed reactor in temperature programmed experiments. The ilmenite concentrates contained different concentrations of TiO2 (55.6-71.5wt%) and iron oxide (Fetotal 14.5-28.2wt%). In the reduction of ilmenite by hydrogen, during ramping reduction temperature from 230 to 1100 °C, only iron oxides were reduced to metallic iron and the reduction was not complete. The reduction of titania was slight. The ilmenite concentrates were reduced by CH4-H2-Ar gas mixture to metallic iron and titanium oxycarbide. Preoxidation and sintering of ilmenite concentrates changed their phase composition and caused a sharp decrease in specific surface area of raw materials and an increase in carburization temperature. Sintering also increased the metallization temperature of iron.

Publication Date


  • 2001

Citation


  • Zhang, G., & Ostrovski, O. (2001). Reduction of ilmenite concentrates by methane containing gas, Part II: Effects of preoxidation and sintering. Canadian Metallurgical Quarterly, 40(4), 489-497. doi:10.1179/cmq.2001.40.4.489

Scopus Eid


  • 2-s2.0-0035483217

Start Page


  • 489

End Page


  • 497

Volume


  • 40

Issue


  • 4

Abstract


  • Reduction of preoxidized and sintered ilmenite concentrates by a CH4-H2-Ar gas mixture was investigated in a laboratory fixed bed reactor in temperature programmed experiments. The ilmenite concentrates contained different concentrations of TiO2 (55.6-71.5wt%) and iron oxide (Fetotal 14.5-28.2wt%). In the reduction of ilmenite by hydrogen, during ramping reduction temperature from 230 to 1100 °C, only iron oxides were reduced to metallic iron and the reduction was not complete. The reduction of titania was slight. The ilmenite concentrates were reduced by CH4-H2-Ar gas mixture to metallic iron and titanium oxycarbide. Preoxidation and sintering of ilmenite concentrates changed their phase composition and caused a sharp decrease in specific surface area of raw materials and an increase in carburization temperature. Sintering also increased the metallization temperature of iron.

Publication Date


  • 2001

Citation


  • Zhang, G., & Ostrovski, O. (2001). Reduction of ilmenite concentrates by methane containing gas, Part II: Effects of preoxidation and sintering. Canadian Metallurgical Quarterly, 40(4), 489-497. doi:10.1179/cmq.2001.40.4.489

Scopus Eid


  • 2-s2.0-0035483217

Start Page


  • 489

End Page


  • 497

Volume


  • 40

Issue


  • 4