方坯连铸结晶器电磁搅拌磁场与流场数值模拟  

Numerical Simulation of Magnetic Field and Flow Field in the Continuous Casting of Billet with Mould Electromagnetic Stirring

作　　者：李建超[1] 吉利宏[1,2] 王宝峰[1] 

机构地区：[1]内蒙古科技大学,内蒙古包头014010 [2]宣化钢铁公司,河北宣化075103

出　　处：《铸造技术》2010年第11期1468-1472,共5页Foundry Technology

基　　金：内蒙古自然科学基金资助项目(2009BS0803)

摘　　要：随着高速连铸技术发展,人们对连铸坯质量的要求越来越高,结晶器电磁搅拌是保证连铸坯质量一个重要的措施。借助有限元分析方法,对小方坯结晶器电磁搅拌过程进行磁场和流场耦合数值分析,得出了不同频率下钢液内部磁感应强度和电磁体积力及搅拌速度的分布规律。模拟结果表明:在结晶器电磁搅拌时,随着频率的增加,钢液内部磁感应强度降低,电磁体积力在钢液内部分布不均匀;在电流频率为3Hz时,钢液搅拌速度最大。With increasing casting productivity,especially as the introduction of high speed billet casting,it re-emphasized the importance of high performing mould electromagnetic stirring （M-EMS） in attaining the targets of productivity and product quality. Based on finite element method,coupled analysis of magnetic field and fluid field in M-EMS for square billet continuous casting was carried out. The distributions of magnetic flux density,magnetic volume force and liquid steel velocity were obtained with same current value and variable frequency. Calculated results showed that,magnetic flux density in the liquid steel was reduced and the distribution of magnetic volume force became non-uniform in the cross section with increased frequency especially at frequency range from 2 Hz to 8 Hz. Liquid steel maximum stirring velocity at middle cross section is at the frequency value of 3 Hz.

关 键 词：频率 结晶器 电磁搅拌 方坯 

分 类 号：TF777.3[冶金工程—钢铁冶金] TF249.7