Eva Ramström, Johan Björkvall, and Jonas Alexis:
Study on desulphurization and reoxidation by coupled thermodynamic modelling and CFD simulation
Reoxidation, desulphurisation, CFD, ladle treatment, model simulation, thermodynamics
In the present work, a thermodynamic model taking into account all involved slag metal reactions was incorporated into a 2-dimensional fluid flow model of an argon stirred ladle. Both, the thermodynamic constraints and the mass balance were considered. The activities of the oxide components in the slag phase were described using the thermodynamic model by Björkvall, and the liquid metal using the dilute solution model. Desulphurization was simulated using the sulphide capacity model developed by KTH group. A 2-dimensional fluid flow model considering slag, steel and argon phases was adopted. The model predictions were compared with industrial data. The promising model calculation encourages new 3-dimensional CFD simulation.
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