Kinetic Variation of the Composition of Inclusions, Steel and Slag During Refining of Pipeline Steel
(Room 202B)
08 May 17
10:00 AM
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10:30 AM
A multiphase reaction model was developed to predict the evolution of inclusions during the refining process after calcium treatment. In order to elaborate the mechanism of chemical composition changes of inclusion, the model combined a coupled reaction model, an effective equilibrium reaction zone model and empirical equations together to carry out kinetic calculations and elementary reactions among steel, slag, refractory, alloy, inclusion and atmosphere. The mass transfer coefficients of calcium after addition in the metal were investigated. The Al2O3 content in inclusions decreased after calcium addition, which is opposite to the increase of MgO content. The developed model showed a good agreement between the calculated results and measured ones, which exhibited good predictability of inclusion evolution during the refining process after calcium treatment.