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The kinetics of reduction of hematite by carbon

  • Process Metallurgy
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Abstract

Reduction kinetics of mixtures of hematite and carbon powders were investigated in the temperature range of 850° to 1087°C. Experiments were carried out under argon atmosphere and the isothermal weight loss of the samples was determined as a function of time. The effects of carbon particle size, hematite/carbon ratio of the mixture, and addition of promotive or inhibitive reagents were also investigated. The results were summarized in the form of fractional reaction vs time plots. A kinetic model developed on the basis of carbon solution-loss reaction as rate-controlling represented the results fairly well. An enthalpy of activation of 72 kcal/per mole was calculated, within the range of 957° to 1087°C. The observed effects of Li2O and FeS on the reduction kinetics are consistent with the influence these reagents are known to exercise on the solution-loss reaction.

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Authors and Affiliations

  1. Henry Krumb School of Mines, Columbia University, New York, N. Y.

    Y. K. Rao (Assistant Professor)

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  1. Y. K. Rao
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Rao, Y.K. The kinetics of reduction of hematite by carbon. Metall Trans 2, 1439–1447 (1971). https://doi.org/10.1007/BF02913373

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  • DOI: https://doi.org/10.1007/BF02913373

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