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The effect of alumina in slag on manganese and silicon distributions in silicomanganese smelting

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Abstract

The distribution ratios of manganese and silicon between silicomanganese alloy and slag, in equilibrium with carbon, were investigated at 1500 °C. The alumina content of the slag was varied from about 9 to 32 pct. Both distribution ratios decreased as A12O3 increased to about 20 pct and, thereafter, remained constant. The value of the “apparent equilibrium constant” displayed a maximum at about 24 pct A12O3, mainly because of the variation in the values of the activity coefficients of SiO2 and MnO. It was concluded that the slag and silicomanganese alloy in a submerged arc furnace are at, or at least close to, equilibrium.

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Authors and Affiliations

  1. Department of Chemical and Metallurgical Engineering, Royal Melbourne Institute of Technology, 3001, Melbourne, Australia

    D. R. Swinbourne (Senior Lecturer)

  2. Director of the G.K. Williams Cooperative Research Centre for Extractive Metallurgy, University of Melbourne, Parkville, Australia

    W. J. Rankin (Professor)

  3. Head of the Department of Metallurgy and Materials Engineering, University of the Witwatersrand, 2050, Witwatersrand, South Africa

    R. H. Eric (Professor)

Authors
  1. D. R. Swinbourne
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  2. W. J. Rankin
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  3. R. H. Eric
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Swinbourne, D.R., Rankin, W.J. & Eric, R.H. The effect of alumina in slag on manganese and silicon distributions in silicomanganese smelting. Metall Mater Trans B 26, 59–65 (1995). https://doi.org/10.1007/BF02648977

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  • DOI: https://doi.org/10.1007/BF02648977

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