电磁制动对CSP漏斗型结晶器流场和液面波动的影响  

Effect of EMBr on the flow field and level fluctuation in CSP funnel type mold

作　　者：张路莎[1,2] 张晓峰[1,2] 王宝[1,2] 刘青[1,2] 胡志刚 

机构地区：[1]北京科技大学钢铁冶金新技术国家重点实验室,北京100083 [2]北京科技大学冶金与生态工程学院,北京100083 [3]河北钢铁技术研究总院,河北石家庄050000

出　　处：《炼钢》2013年第3期41-44,共4页Steelmaking

基　　金：国家自然科学基金项目(51074023)

摘　　要：针对铸坯断面为1 500 mm×90 mm的漏斗型结晶器,在拉速为5 m/min的条件下,通过耦合湍流模型、多相流模型以及电磁制动模型,计算了电磁场作用下结晶器内流体流动与液面波动特征。数值模拟结果表明,应用电磁制动能显著改变结晶器内钢液流动行为,使结晶器内流场分布更加均匀。此外,当施加的磁场强度为0.2和0.3 T时,结晶器最大液面波动高度从未施加电磁制动时的15 mm减小至9.2 mm和2.33 mm。综合考虑到电磁制动效果与生产成本,合理的磁场强度应控制在0.2～0.3 T。Through the coupling of turbulence model, multiphase flow model and elec- tromagnetic brake （EMBr） model, the fluid flow and level fluctuation of CSP funnel type mold are simulated in the 1 500 mmx 90 mm CSP funnel type mold with the casting speed of 5 m/min. The numerical simulation results indicate that the application of EM- Br improves the behaviors of fluid flow in the mold significantly. And the flow field in- side the mold is more uniform. The maximum fluctuation height is obviously reduced from 15 mm under the condition of without EMBr to 9. 2 mm and 2. 33 mm when the magnetic flux density is 0. 2 T and 0. 3 T, respectively. Considering both the braking effect and the production cost, the magnetic flux density which is between 0. 2 T and 0. 3 T could be reasonable.

关 键 词：连铸 漏斗型结晶器 电磁制动 流场 液面波动 数值模拟 

分 类 号：TF777.7[冶金工程—钢铁冶金]