280mm×380mm方坯连铸结晶器电磁搅拌数值模拟

Numerical Simulation of Mold Electromagnetic Stirring in 280 mm×380 mm Bloom Continuous Casting

根据麦克斯韦电磁理论,建立了280 mm×380 mm方坯连铸结晶器电磁搅拌的数学模型,并应用模型分析了结晶器内电磁场、电磁力的分布特征,以及电磁搅拌电流强度、频率等对电磁场和电磁力的影响。结果表明,旋转磁场在结晶器搅拌区域内产生电磁力,使钢液在水平方向形成旋转流动;电磁搅拌所产生的磁感应强度的大小与搅拌电流大小成线性关系,而在低频率搅拌条件下频率的大小对电磁搅拌强度的影响较小。

In order to simulate the magnetic induction density and electromagnetic stirring force in 280 mm ×380 mm continuous bloom casting mold, a mathematical model was presented according to Maxwell electromag- netic field theory. On this basis, the distribution of the magnetic induction density and electromagnetic stirring force were analyzed. Numerical simulation results show that the rotating magnetic field can generate the electromagnetic force in mold region, which makes molten steel whirl in level section. The magnetic induction density changes linearly with the stirring current intensity, while the effect of lower stirring frequency on the magnetic induction density is slight.