Analysis of dephosphorization reaction using a simulation model of hot metal dephosphorization by multiphase slag

Shin Ya Kitamura, Ken Ichiro Miyamoto, Hiroyuki Shibata, Nobuhiro Maruoka, Michitaka Matsuo

Research output: Contribution to journalArticlepeer-review

13 Citations (Scopus)

Abstract

In most cases, the slag used in hot metal dephosphorization is saturated with dicalcium silicate, and the partition ratio of phosphorus between dicalcium silicate and liquid slag is high. These results indicate the important role of solid dicalcium silicate in dephosphorization. In order to understand reaction kinetics and obtain an optimum treatment method, it is very important to know the influence of the solid phases in the slag. In this study, a new reaction model for hot metal dephosphorization is applied to the experimental results; this model considers the effects of dicalcium silicate and the dissolution rate of lime. By the calculation results, the influence of various factors on the reaction efficiency is discussed. The calculated results are in almost good agreement with the experimental results obtained by various slag compositions and by various methods of flux and oxide additions to hot metal. By the calculation, in order to perform the dephosphorization reaction efficiently, we clarify the existence of the optimum basicity that considers the precipitation behavior of the solid phase in slag. Also, the optimum condition between the stirring energy and the supplying rate of flux and oxide was found.

Original languageEnglish
Pages (from-to)313-320
Number of pages8
JournalTetsu-To-Hagane/Journal of the Iron and Steel Institute of Japan
Volume95
Issue number3
DOIs
Publication statusPublished - 2009

Keywords

  • Dephosphorization
  • Hot metal treatment
  • Reaction kinetics
  • Slag

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Physical and Theoretical Chemistry
  • Metals and Alloys
  • Materials Chemistry

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