The relationship between basicity and swelling on reduction of iron-ore pellets |
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| Authors: | F.W. Frazer H. Westenberger K.H. Boss W. Thumm |
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| Affiliation: | 1. The Broken Hill Pty. Company Ltd., Central Research Laboratories, Shortland, N.S.W. Australia;2. Metallgesellschaft A.G., Exploration Department, Frankfurt F.R.G.;3. Lurgi Chemie und Hüttentechnik G.m.b.H., Research Laboratories, Frankfurt F.R.G. |
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| Abstract: | The influence of gangue composition on swelling during reduction of iron-ore pellets is investigated for nine iron ores with a range of basicities. X-ray diffraction studies show that high swelling on reduction is accompanied by the formation of low-melting-point, calcium-substituted olivines. Recrystallisation of the hematite structure occurs on firing high-basicity pellets. An explanation is given for the existence of high swelling for fired pellets of basicities 0.2–0.8. |
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