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Metallurgical and Materials Transactions B

, Volume 42, Issue 3, pp 477–489 | Cite as

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

  • Marie-Aline van Ende
  • Young-Min Kim
  • Mun-Kyu Cho
  • Juhan Choi
  • In-Ho JungEmail author
Article

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.

Keywords

Reaction Zone Decarburization Molten Steel Bubble Surface Bath Surface 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Notes

Acknowledgment

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

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Copyright information

© THE MINERALS, METALS & MATERIALS SOCIETY and ASM INTERNATIONAL 2011

Authors and Affiliations

  • Marie-Aline van Ende
    • 1
  • Young-Min Kim
    • 1
  • Mun-Kyu Cho
    • 2
  • Juhan Choi
    • 3
  • In-Ho Jung
    • 1
    Email author
  1. 1.Department of Mining and Materials EngineeringMcGill UniversityMontrealCanada
  2. 2.Research Institute of Industrial Science and TechnologyGyeongbukRepublic of Korea
  3. 3.Steelmaking Research Group, Technical Research Laboratories, POSCOGyeongbukRepublic of Korea

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