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The influence of sulfur on interfacial reaction kinetics in the decarburization of liquid iron by carbon dioxide

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Abstract

The kinetics of decarburization of continuously carbon-saturated liquid iron by CO2 have been studied between 1280 and 1600‡C at sulfur concentrations between 0.01 and 1 wt pct. The results are consistent with a surface blockage mechanism by chemisorbed sulfur which shows an essentially ideal adsorption isotherm. The adsorption coefficient of sulfur, in (wt pct)-1, is given by the equation logK = 3600/T + 0.57 for carbon-saturated alloys. A small residual rate at apparent surface saturation is observed. This leaves about 1.4 pct of the active surface sites available for reaction, essentially independent of temperature. Studies with varying carbon concentration suggest that to a first approximation, and above about 3 wt pct C, the adsorption equilibrium for sulfur depends only on the thermodynamic activity of sulfur.

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Authors and Affiliations

  1. Owens-Corning Fiberglass Technical Center, P. O. Box 415, 43023, Granville, OH

    D. R. Sain (Research Scientist)

  2. Department of Metallurgy and Materials Science Kl, University of Pennsylvania, 19104, Philadelphia, PA

    G. R. Belton (Professor)

Authors
  1. D. R. Sain
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  2. G. R. Belton
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DR. SAIN was formerly a Graduate Student.

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Sain, D.R., Belton, G.R. The influence of sulfur on interfacial reaction kinetics in the decarburization of liquid iron by carbon dioxide. Metall Trans B 9, 403–407 (1978). https://doi.org/10.1007/BF02654414

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  • DOI: https://doi.org/10.1007/BF02654414

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