Numerical Simulation of Steel Flow in Submerged Entry Nozzle for Slab Continuous Casting

Mathematical model such as CFX is a powerful tool for getting an insight into the production sequence of the steel.Mathematical model of fluid flow in submerged entry nozzle in high speed slab continuous casting shows that the bottom structure and the structure mode of flow switch are main factor affecting the outlet velocity values in the submerged entry nozzle,the unstabilization and non-equilibrium velocities from the outlet of the submerged entry nozzle also affect velocity values in the mold,the bottom structure and the mode of flow switch structure are very important at high speed.Sliding gate and heave-bottom structure and level-bottom structure are availability for fluid flow in submerged entry nozzle in high-speed slab continuous casting.If the bottom structure and the mode of flow switch structure are unsuitable,the asymmetric unbalance steel flow from submerged entry nozzle to mold,mold original slab shell non-uniformity crash and surface vortex,and unbalance steel flow also cause nozzle clogging,unsteady and disequilibrium heat transfer in mold,and at last cause breakout and slag trapping and defect in slab.