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

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
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1984

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References

Anon (1963) Steel Review 30, The British Iron and Steel Federation Quarterly. Google Scholar
Bitsaine, G. & Joseph, T.L. (1955) J. Metals 177, 639.Google Scholar
Bones, W.A., Saunders, H.L. & Tress, H.J. (1938) J. Iron and Steel Inst. 1, 85.Google Scholar
Brill-Edwards, H. & Samuel, R.L. (1965) J. Iron and Steel Inst. 203, 361.Google Scholar
Cox, T.G. & Sale, F.R. (1974) Ironmaking and Steelmaking 4, 234.Google Scholar
Edstrom, J.O. (1957) Jernkont. Ann. 141, 809.Google Scholar
Elgeassy, A.A., Shehata, K.A. & Ezz, J.Y. (1977) Iron and Steel Int. 5, 331.Google Scholar
English, B.L. & Robert, D.A. (1978) Trans. Inst. Min. Metall., Sect. C87, 113.Google Scholar
Fitton, J.T. & Goldring, D.C. (1966) J. Iron and Steel Inst. 204, 452.Google Scholar
Gray, N.B. & Henderson, J. (1966) Trans. Met. Soc. AIME 236, 1213.Google Scholar
Harbord, N.H. & Goldring, D.C. (1965) J. Iron and Steel Inst. 203, 349.Google Scholar
Lien, H.O., El-Mehairy, A. & Ross, H.U. (1971) J. Iron and Steel Inst. 209, 341.Google Scholar
McBriar, E.M., Johnson, W., Andrews, K.W. & Davies, W. (1954). J. Iron and Steel Inst. 177, 316.Google Scholar
McEwan, W.M. (1962) Trans. Met. soc. AIME 224, 387.Google Scholar
Mihelik, P. & Smits, G. (1973) NIM Report 1565, Johannesburg, S. Africa.Google Scholar
Morrison, A.L., Wright, J.K. & Bowling, M.McG. (1978) Ironmaking and Steelmaking 5, 32.Google Scholar
Parks, C.J. & McDiarmid, R.A. (1970) Ore Deposits, p. 245. W.H. Freeman Ltd. Google Scholar
Pounds, N.J. (1959) The Geography of Iron and Steel, p. 11. Hutchinson and Co. Ltd.Google Scholar
Reeve, L. (1948) J. Iron and Steel Inst. 159, 277.Google Scholar
Robson, R. (1968) ECA Paper A4 in: 2nd Int. Symp. on the Iron and Steel Industry. UNIDO, Moscow.Google Scholar
Shehata, K.A. & Ezz, S.Y. (1973) Trans. Inst. Min. MetalL Sect. C82, 38.Google Scholar
Soma, T. (1963) J. Iron and Steel Inst. Japan 49, 1645.CrossRefGoogle Scholar
Viswanath, R.P., Viswanath, B. & Sashtri, M.C. (1977) Trans. Japan Inst. Metals 18, 149.CrossRefGoogle Scholar
Wild, R. & Saunders, H.L. (1950) J. Iron and Steel lnst. 173, 198.Google Scholar