Analysis of steelmaker reactions by coupled reaction model

Shin Ya Kitamura

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Kinetic modeling is very important to understand steelmaking reactions. The coupled reaction model proposed by Prof. D.G.C Robertson is the best suited program, and therefore, the author has applied it to the various steelmaking reactions, a few examples of which are discussed. Hot metal dephosphorization occurs under non-equilibrium conditions as it takes place between the slag, which has a high oxygen potential, and the hot metal, which has a low oxygen potential. A process simulation model based on the coupled reaction model was constructed. This model considers the solid and liquid slag, liquid metal phases, and the reaction between the solid and liquid slag, besides the reaction between the liquid slag and liquid metal. Using this model, the ruling factor to increase the reaction efficiency of dephosphorization has been verified. In the secondary refining process, the values of inclusion composition calculated by the thermodynamic model, under the assumption of equilibrium with the metal composition, were found to be different from those observed in practice. A kinetic model, incorporating the reactions between slag, metal, inclusion, and refractory has been postulated, and the composition change of inclusion during treatment has been analyzed.

Original languageEnglish
Title of host publicationCelebrating the Megascale
Subtitle of host publicationProceedings of the Extraction and Processing Division Symposium on Pyrometallurgy in Honor of David G.C. Robertson - Held During TMS 2014 143rd Annual Meeting and Exhibition
PublisherMinerals, Metals and Materials Society
Pages317-324
Number of pages8
ISBN (Print)9781118889619
Publication statusPublished - 2014 Jan 1
EventCelebrating the Megascale: Extraction and Processing Division Symposium on Pyrometallurgy in Honor of David G.C. Robertson - TMS 2014 143rd Annual Meeting and Exhibition - San Diego, CA, United States
Duration: 2014 Feb 162014 Feb 20

Publication series

NameTMS Annual Meeting

Other

OtherCelebrating the Megascale: Extraction and Processing Division Symposium on Pyrometallurgy in Honor of David G.C. Robertson - TMS 2014 143rd Annual Meeting and Exhibition
Country/TerritoryUnited States
CitySan Diego, CA
Period14/2/1614/2/20

Keywords

  • Decarburization
  • Dephosphorization
  • Inclusion
  • Kinetics
  • Steelmaking

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Mechanics of Materials
  • Metals and Alloys

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