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Decarburization kinetics of liquid Fe−Csat alloys by CO2

  • Physical Chemistry
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Abstract

The kinetics of the decarburization reaction of Fe−Csat liquid alloys by CO2 were investigated at 1600°C under conditions where the rate is not significantly affected by liquid- or gas-phase mass transfer. Rates of decarburization were measured by monitoring the change in gas composition with an in-line mass spectrometer. Small amounts of S, P, Sn, and Pb were alloyed with the Fe−Csat melt to determine their effect on the interfacial rate constant. The rate constant measured for the Fe−Csat−S alloys is in agreement with previous results for Fe−S alloys and was found to be inversely proportional to sulfur concentration at low sulfur levels. For high S-containing alloys where the surface is saturated with sulfur, a residual rate was observed. The effects of phosphorus and lead on the rate constant are negligible. Tin decreases the rate constant, but the effect is small, even when the tin content is as high as 2.6 wt pct.

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Authors and Affiliations

  1. USS Technical Center, U.S. Steel, 15146, Monroeville, PA

    F. J. Mannion (Senior Research Engineer)

  2. Center for Iron and Steelmaking Research, Department of Metallurgical Engineering and Materials Science, Carnegie Mellon University, 15213, Pittsburgh, PA

    R. J. Fruehan (Professor and Director)

Authors
  1. F. J. Mannion
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  2. R. J. Fruehan
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F.J. MANNION, formerly Graduate Student, Carnegie Mellon University

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Mannion, F.J., Fruehan, R.J. Decarburization kinetics of liquid Fe−Csat alloys by CO2 . Metall Trans B 20, 853–861 (1989). https://doi.org/10.1007/BF02670190

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  • DOI: https://doi.org/10.1007/BF02670190

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