Analysis of Dephosphorization Reaction Using a Simulation Model of Hot Metal Dephosphorization by Multiphase Slag

Fundamental Researches on the High-speed and High-efficiency Steelmaking Reaction

“…To calculate the dissolution rate of lime, empirical equation, assuming that the dissolution rate was controlled by the mass transfer in the slag, proposed by Matsushima et al [9] was used. The calculated results are in good agreement with the experimental results for various slag compositions and methods of flux and oxidizer addition as shown in Figure 7 [7]. With this simulation model, the influence of various factors on the reaction efficiency can be discussed.…”

“…In addition, the added flux is assumed to melt into the slag instantaneously, With this background, we propose a new hot metal dephosphorization model that takes into account the solid phase in the slag and the dissolution rate of the flux [7]. We also discuss the optimum dephosphorization conditions and compare the predictions of this model with experimental results.…”

“…With this simulation model, the influence of various factors on the reaction efficiency can be discussed. For example, the optimum basicity (Figure 8 [7]) and the optimum combination of stirring energy and oxidizer supply rate were found.…”

Behavior of Vanadium and Niobium during Hot Metal Dephosphorization by CaO–SiO₂–Fe_tO Slag

“…Details about the model can be found elsewhere; 12,13,[15][16][17] therefore, in this study, we only provide a brief description. In this model, three phases: solid slag, liquid slag, and liquid metal and the reaction between the solid slag and the liquid slag are considered as well as the reaction between the liquid slag and the liquid metal.…”

“…Then, the behaviors of V and Nb in hot metal dephosphorization by CaO-SiO2-FetO slag were investigated. Finally, a previously described hot metal simulation model 12,13) was modified and the behaviors of various elements, including V and Nb, during hot metal dephosphorization were simulated, and the results were compared with experimental ones.…”