TY - JOUR
T1 - Analysis of dephosphorization reaction using a simulation model of hot metal dephosphorization by multiphase slag
AU - Kitamura, Shin Ya
AU - Miyamoto, Ken Ichiro
AU - Shibata, Hiroyuki
AU - Maruoka, Nobuhiro
AU - Matsuo, Michitaka
N1 - Copyright:
Copyright 2010 Elsevier B.V., All rights reserved.
PY - 2009
Y1 - 2009
N2 - 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.
AB - 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.
KW - Dephosphorization
KW - Hot metal treatment
KW - Reaction kinetics
KW - Slag
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U2 - 10.2355/tetsutohagane.95.313
DO - 10.2355/tetsutohagane.95.313
M3 - Article
AN - SCOPUS:77249120031
VL - 95
SP - 313
EP - 320
JO - Tetsu-To-Hagane/Journal of the Iron and Steel Institute of Japan
JF - Tetsu-To-Hagane/Journal of the Iron and Steel Institute of Japan
SN - 0021-1575
IS - 3
ER -