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A Kinetic Model for the Ruhrstahl Heraeus (RH) Degassing Process

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Abstract

A kinetic model (effective equilibrium reaction zone model) was developed to simulate the decarburization reaction in the Ruhrstahl Heraeus (RH) degassing process. The model assumes that the chemical reactions reach equilibrium in the designated effective reaction volumes near the reaction interfaces. After the RH degassing process was divided into various reaction zones, the effective reaction volumes of each reaction zone were expressed as a function of the process conditions based on the physical descriptions of the reaction mechanisms. The influence of the chemical reaction between the RH slag and the RH steel to the decarburization phenomena was considered for the first time. The calculated C and O profiles by the present model are in good agreement with the industrial operation data for various steel compositions and process conditions. RH slag can serve as an oxygen reservoir to supply O during the RH decarburization process, which induces the observed deviation of the C and O contents from their ideal stoichiometric trajectory. The present model provides an efficient tool to understand the RH degassing process.

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Acknowledgment

The authors wish to thank POSCO and the Research Institute of Industrial Science and Technology for their financial support and industrial run data.

Author information

Authors and Affiliations

  1. Department of Mining and Materials Engineering, McGill University, Montreal, QC, H3A 2B2, Canada

    Marie-Aline van Ende (Post Doctorate Fellow), Young-Min Kim (Post Doctorate Fellow) & In-Ho Jung (Assistant Professor)

  2. Research Institute of Industrial Science and Technology, Gyeongbuk, 790-600, Republic of Korea

    Mun-Kyu Cho (Senior Researcher)

  3. Steelmaking Research Group, Technical Research Laboratories, POSCO, Gyeongbuk, 790-300, Republic of Korea

    Juhan Choi (Senior Researcher)

Authors
  1. Marie-Aline van Ende
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  2. Young-Min Kim
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  3. Mun-Kyu Cho
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  4. Juhan Choi
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  5. In-Ho Jung
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Corresponding author

Correspondence to In-Ho Jung.

Additional information

Manuscript submitted October 5, 2010.

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van Ende, MA., Kim, YM., Cho, MK. et al. A Kinetic Model for the Ruhrstahl Heraeus (RH) Degassing Process. Metall Mater Trans B 42, 477–489 (2011). https://doi.org/10.1007/s11663-011-9495-4

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  • DOI: https://doi.org/10.1007/s11663-011-9495-4

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