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Phosphorus Equilibrium Between Liquid Iron and CaO-SiO2-MgO-Al2O3-FeO-P2O5 Slag Part 1: Literature Review, Methodology, and BOF Slags

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Abstract

Although the phosphorus reaction in steelmaking has been extensively studied, it continues to be a relevant topic as low phosphorus iron sources become less available and more expensive, necessitating the need for more accurate predictions of the partitioning of phosphorous as function of slag composition and temperature. The current study revisits some of the relevant literature on the topic and details the methodology and experimental setup used in recent studies on phosphorus equilibrium between liquid iron and slags. New data for BOF-type slags are presented, where equilibrium was approached from both metal and slag sides i.e., phosphorus was transferred from metal to slag and vice versa. It was found that slags with basicities higher than 2.5 and FeO contents around 20 to 25 wt pct can promote extensive dephosphorization, and high L P, ((pct P)/[pct P]), values were observed i.e., greater than 500.

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Acknowledgments

The authors thank the Center for Iron and Steelmaking Research at Carnegie Mellon University for funding this project.

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Author notes

  1. Andre N. Assis (Ph.D. Candidate, Senior Process Engineer)

    Present address: Operations Technology Department, Vallourec Star, Youngstown, OH, USA

Authors and Affiliations

  1. Department of Materials Science and Engineering, Carnegie Mellon University, 5000 Forbes Avenue, Pittsburgh, PA, USA

    Andre N. Assis (Ph.D. Candidate, Senior Process Engineer), Mohammed A. Tayeb (Ph.D. Candidate, Research Engineer) & Richard J. Fruehan (Professor)

  2. Metals Technology, SABIC Metals SBU, Jubail Industrial City, Saudi Arabia

    Mohammed A. Tayeb (Ph.D. Candidate, Research Engineer)

  3. Warwick Manufacturing Group, University of Warwick, Gibbet Hill Road, Coventry, U.K.

    Seetharaman Sridhar (Professor)

Authors
  1. Andre N. Assis
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  2. Mohammed A. Tayeb
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  3. Seetharaman Sridhar
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  4. Richard J. Fruehan
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Corresponding author

Correspondence to Andre N. Assis.

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Manuscript submitted June 1, 2015.

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Assis, A.N., Tayeb, M.A., Sridhar, S. et al. Phosphorus Equilibrium Between Liquid Iron and CaO-SiO2-MgO-Al2O3-FeO-P2O5 Slag Part 1: Literature Review, Methodology, and BOF Slags. Metall Mater Trans B 46, 2255–2263 (2015). https://doi.org/10.1007/s11663-015-0408-9

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  • DOI: https://doi.org/10.1007/s11663-015-0408-9

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