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Kinetics of Reaction Important in Oxygen Steelmaking

  • Kenneth S. Coley
  • Elaine Chen
  • Michael Pomeroy
Conference paper

Abstract

Recent work on modeling of BOF steelmaking is reviewed, highlighting the critical aspects of each approach. It is concluded that the most successful models should be based on a deep understanding of the mechanisms and kinetics of the critical reactions. The importance of the decarburization mechanism is discussed with particular reference to its role in droplet swelling or bloating which has a profound influence on the droplet residence time in the slag. Conditions which cause bloating are discussed and the rate determining step is proposed to be primarily nucleation of CO bubbles inside the metal droplet with some influence from growth by reaction at the bubble/metal interface. The discrepancy in the super-saturation ratio required for classical nucleation is discussed and an approach using a surface tension modifying parameter is illustrated. Finally, the role of CO nucleation in controlling the driving force for dephosphorization is discussed.

Keywords

Steelmaking BOF Modelling Kinetics of Droplet Decarburization 

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Copyright information

© TMS (The Minerals, Metals & Materials Society) 2014

Authors and Affiliations

  • Kenneth S. Coley
    • 1
  • Elaine Chen
    • 2
  • Michael Pomeroy
    • 1
  1. 1.Master Steel Research Centre, Department of Materials Science and EngineeringMcMaster UniversityHamilton, OntarioCanada
  2. 2.Arcelor-Mittal, Global R&DEast ChicagoUSA

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