Physical and Mathematical Simulation of Molten Steel Flowing in a FTSC Mold

摘要

The turbulent flow behavior of molten steel and the interfacial behavior between molten steel and slag layer in the FTSC mold were simulated with physical and mathematical model. In the physical simulation experiment, a 0.667-scale physical model was built to investigate the effects of different submerged entry nozzles (SEN) on the interfacial profiles between steel and slag, the spout eye of slag layer and the slag entrapment. And the turbulent two-phase flow model was developed with VOF (Volume of Fluid) method to simulate the interface movement between molten steel and slag layer and the fluid flow distribution inside the mold. The results of experiments and calculation indicate that there are some obvious recirculation regions in one side of FTSC mold with four-port SEN casting. The quantity and location of the recirculation regions change with the structure of nozzles. The interfacial profiles between steel and slag, the location of spout eye of slag layer, and the flow rate of molten steel through the upper port and lower port into the mold have differences with different nozzle.