Abstract
The kinetics of reduction of hematite powder to magnetite in CO-CO2 gas mixtures at temperatures between 500 and 663 °C have been measured. The reactions are described in terms of a simple nucleation and growth model. The chemical reaction rate constants for the reduction of hematite to magnetite are obtained and the nucleation frequencies of magnetite on hematite are calculated for a range of temperatures and oxygen partial pressures. A possible technique for the improvement of the “reducibility” of dense hematite ores is suggested.
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Formerly at Metallurgy Department, Strathclyde University, Glasgow, Scotland.
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Hayes, P.C., Grieveson, P. The effects of nucleation and growth on the reduction of Fe2O3 to Fe3O4 . Metall Trans B 12, 319–326 (1981). https://doi.org/10.1007/BF02654465
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DOI: https://doi.org/10.1007/BF02654465