| Electromagnetic stirring which is one of the effective methods for controlling solidification of metal has a large-scale industrial application. Electromagnetic stirring improves the solidification and internal crystalline state; thereby it enhances the quality of continuous casting by means of electromagnetic induction non-converter which transforms electromagnetic power into electromagnetic force that impels the liquid metal to stir. Domestic and foreign scholars study fully on the M-EMS research, but the study on the submerged nozzle electromagnetic stirring relatively is less than other.Based on Maxwell theory of electromagnetic stirring, the analytical form of electromagnetic force is derived according to Maxwell equations. Through the procedures of the UDF and the fluid dynamics analysis software FLUENT, the electromagnetic force is applied to the submerged entry nozzle of the liquid steel. Then research is carried on that shows the effects of electromagnetic stirring on the round billet continuous casting mold of flow field and temperature field.While another numerical simulation of X-type diversion device is researched. Distribution rule of speed field, temperature field and congeal field of fluid in crystallizer taken X-type submerged nozzle using rational flow pouring is researched.The results which are showed by different styles of stirring with numerical simulation are: the swirling flow nozzle is fit for mix of flow velocity. Horizontal swirl kinetic energy makes the liquid in the vertical direction of the energy decrease. The SEN electromagnetic stirring increases the vertical speed of decay and makes the vertical speed tend to uniformity rapidly on the mold section and reduces the impact of depth. It plays a role of braking fluid. At the same time, swirling streams make the slab temperature homogenization significantly. |
PDF Full Text Request