16.350 mm 大方坯连铸结晶器电磁搅拌电磁场与流场耦合数值模拟*

易军1，邢淑清1，王军1，李美玲2，麻永林1

( 1. 内蒙古科技大学材料与冶金学院，内蒙古包头014010; 2. 内蒙古大学物理科学与技术学院，内蒙古呼和浩特010020)

关键词: 方坯连铸; 电磁搅拌; 耦合; 数值模拟

中图分类号: TM153; 0242 文献标识码: A

摘要: 采用三维有限元技术研究350 mm × 350 mm 大方坯连铸结晶器电磁搅拌过程电磁场、电磁力和流场的变化规律. 在固定电流强度、搅拌器尺寸等参数情况下，研究搅拌频率对铸坯内部磁感应强度、电磁力及钢液流动速度的影响. 研究表明: 搅拌频率为2，6 和8 Hz 时，磁感应强度在6 Hz 时出现最大磁感应强度，电磁力也出现峰值，钢液流动速度最大，说明350 mm 方坯搅拌在2 Hz 到8 Hz 有一个最优值. 从电磁力的分布看，搅拌器的下端出现向上的电磁力，有利于减小钢液的冲击深度.

The numerical simulation of the magnetic and flowing fields in M-EMS bloom casting process

YI Jun1，XING Shu-qing1，WANG Jun1，LI Mei-ling2，MA Yong-lin

( 1． Materials and Metallurgy School，Inner Mongolia University of Science and Technology，Baotou 014010，China; 2． College of Physics and Technology，Inner Monglia University，Huhehaote 010020，China)

Key words: bloom casting; electromagnetic stirring; coupling solution; numerical simulation

Abstract: The 3D finite element method is used to simulate the fields of magnetic and flowing in 350 ×    350mm   bloom casting process，where the relation of frequencies with magnetic fields，Lorentz force and flowing patterns is investigated under the fixed condition of currents and dimension of the stirrer． From the simulation of different frequencies，when frequencies is at 6Hz，the magnetic intension and Lorentz force have reached maximum values and a peak value of flowing rate also appears at this frequency． From all the results from 2 Hz to 8 Hz，there is an optimum value in this range of frequencies． Meanwhile，for the Lorentz force，a vertical force vector opposed to the casting direction is clearly displayed at the bottom of the stirrer，which could reduce the depth of hot liquid steel running from nozzle．