Numerical Simulation of Gas-Steel-Slag Multiphase Flow in the Vacuum Chamber of the RH Degasser

A particle-free surface coupled model has been developed using the Eulerian-Eulerian approach for revealing the gas-steel-slag multiphase flow in the vacuum chamber of a 210-ton RH degasser. The particle submodel preferred to predict the gas-steel and gas-slag interpenetrating phenomena, while the free surface submodel focused on tracking the steel-slag interface flow. The mesh sensitivity analysis has been investigated, and the coupled model was validated by the measured values. Using this coupled model, some previously unknown problems about multiphase flow in the vacuum chamber were revealed, such as the effect of the free surface fluctuation, variation of the liquid level, and slag flow behavior.

Automated summary

A particle-free surface coupled model using the Eulerian-Eulerian approach was developed to reveal gas-steel-slag multiphase flow in the vacuum chamber of a 210-ton RH degasser. The model, validated by measured values, uncovered previously unknown problems such as free surface fluctuation, liquid level variation, and slag flow behavior.