Stability of Cementite formed from Hematite and Titanomagnetite Ore

Authors

Raymond J. Longbottom, Norwegian University of Science and TechnologyFollow
Oleg Ostrovski, University of New South Wales
Jianqiang Zhang, University of New South Wales
David J. Young, University of New South Wales

RIS ID

32987

Publication Details

Longbottom, RJ, Ostrovski, O, Zhang, J & Young, DJ, The Stability of Cementite formed from Hematite and Titanomagnetite Ore, Metallurgical and Materials Transactions B: Process Metallurgy and Materials Processing Science, 38B(2), 2007, p 175-184.

Abstract

The stability of cementite formed during the reduction of hematite and preoxidized titanomagnetite ores in a methane-hydrogen gas mixture was examined in the temperature interval 500^oC to 900^oC for the hematite ore and 300^oC to 1100^oC for titanomagnetite. Cementite formed from hematite ore was most stable at temperatures between 750^oC to 770^oC. Its decomposition rate increased with decreasing temperature between 750^oC and 600^oC and with increasing temperature above 770^oC. Cementite formed from preoxidized titanomagnetite was most stable in the temperature range 700^oC to 900^oC. The rate of cementite decomposition increased with decreasing temperature between 700^oC and 400^oC and with increasing temperature above 900^oC. Cementite formed from titanomagnetite ore was more stable than cementite formed from hematite under all conditions examined.