Numerical simulation of Tundish Nozzle Clogging during Continuous Casting
连铸中间包水口堵塞的数值模拟

Molten steel flow field in tundish nozzle and effect of some factors on depositing rate were researched by numerical simulation method.The depositions near slide gate and at the bottom of submerged entry nozzle (SEN) were more serious than those of other places.Argon flowrate influenced markedly upon the pressure in the nozzle,and the pressure dropped suddenly near slide gate after molten steel flowing through the slide gate.To avoid inspiration of air,argon flowrate was more than 10 L/min when the slide gate opening ratio was 66.45% and casting speed was 1.2 m/min.Depositing rate of alumina increased linearly with increasing mass concentration of alumina,and increased with inceasing casting speed.Blowing argon only decreased the depositing rate at an appropriate range of argon flowrate.The argon flowrates of 5 and 30 L/min have the similar effect on the depositing rate at the same casting speed.