Simulation Of Reaction Kinetics At Metal-Slag Interface In Steel Refining Process

Abstract:

Reactions taking part at metal–slag interface depend on both factors: chemical compositions of phases staying in contact and intensity of reactants transport across the metal-slag interface. The first factor depends on alloy added during process of steel refining to metal bath and materials affecting chemical composition of slag. The second factor mainly depends on intensity of metal bath mixing by inert gas injection. In papers authors present hybrid model of steel refining process in ladle furnace. The research was focused on influence mixing conditions on time needed to achieve equilibrium state in the system. The hybrid model pays special attention to chemical reactions taking part at metal-slag interface which have been simulated based on thermodynamic calculation. On the basis of verified model of steel refining process the series of virtual experiments were done. The goal of those experiments was to find out the model sensitivity on main factors connected with process steering. The model’s results were compared with industrial data collected during testing heats on ladle furnace. The structure of proposed model make it possible to consider time and duration of materials added to ladle during process which gives the possibility to model precisely the real process in ladle furnace.In summary of research authors contain conclusions concerning the area of model application and possibilities of future development of hybrid model to steel refining processes which proceed at very low pressure.

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