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Characterization and reducibility of Itakpe and Agbaja (Nigerian) iron ores

Published online by Cambridge University Press:  09 July 2018

F. A. Adedeji  and
F. R. Sale
F. A. Adedeji
Affiliation:
Delta Steel Complex, Warri, Nigeria
F. R. Sale
Affiliation:
Department of Metallurgy and Materials Science, University of Manchester, Grosvenor Street, Manchester M1 7HS
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Abstract

Two iron ore samples from Nigeria have been examined using TG, DTA, EGA, XRD, and optical and electron microscopy. Itakpe iron ore is hematite-rich, this mineral being intergrown with magnetite, and silica is the major impurity. Agbaja ore is an acidic oölite ore consisting of goethite and magnetite, with alumina, silica and phosphorus as major impurities. Itakpe is typical of a rich ore formed by magmatic segregation whilst Agbaja is a lean ore of sedimentary origin. Isothermal mass-change measurements in hydrogen and carbon monoxide in the range 800–1100°C show Agbaja to be less reducible than Itakpe; in particular, Agbaja is very irreducible at 1100°C because of sintering of the ore. Characterization and reducibility experiments were also carried out on Corby (Northamptonshire, UK) iron ore for comparison.

Type
Research Article
Information
Clay Minerals , Volume 19 , Issue 5 , December 1984 , pp. 843 - 856
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1984

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