Reduction of Titania-Ferrous Ore by Carbon Monoxide

The reduction of titania-ferrous ore (ironsand) containing 57.2 wt% of iron and 7-8 wt% of TiO2 was investigated in non-isothermal and isothermal reduction experiments using CO-CO2-Ar gas mixtures in a laboratory fixed bed reactor. Samples in the course of reduction were characterised using XRD, EPM...

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Bibliographic Details
Published in:ISIJ International 2003/09/15, Vol.43(9), pp.1316-1325
Main Authors: Park, Eungyeul, Ostrovski, Oleg
Format: Article
Language:English
Subjects:
Applied sciences
carbon monoxide
Exact sciences and technology
magnetite (Fe3O4)
Metallurgical fundamentals
Metals. Metallurgy
Production of metals
reduction
titano-hematite
titano-magnetite (Fe3−xTixO4)
ulvospinel (Fe2TiO4)
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Summary:The reduction of titania-ferrous ore (ironsand) containing 57.2 wt% of iron and 7-8 wt% of TiO2 was investigated in non-isothermal and isothermal reduction experiments using CO-CO2-Ar gas mixtures in a laboratory fixed bed reactor. Samples in the course of reduction were characterised using XRD, EPMA and SEM. Two types of particles were identified in ironsand: 1) homogeneous particles of titano-magnetite with cubic spinel structure (a major type); and 2) non-homogeneous particles, characterised by lamellar structure of rhombohedral titano-hematite, exsoluted from the titano-magnetite. Titano-magnetite, which is a magnetite-ulvospinel solid solution (Fe3O3)1−x(Fe2TiO4)x, with x=0.27±0.02, was reduced to metallic iron and titanium sub-oxides. Titanium had a strong effect on the mechanism and rate of reduction of iron oxide in ironsand.
ISSN:0915-1559
1347-5460
DOI:10.2355/isijinternational.43.1316