宽度对CSP漏斗形结晶器电磁制动效果影响的数值模拟  

Numerical Simulation of EMBr Effect in the CSP Funnel-Type Mold With Different Width

作　　者：徐绵广[1] 刘和平[1] 仇圣桃[1] 项利[1] 

机构地区：[1]钢铁研究总院连铸技术国家工程研究中心,北京100081

出　　处：《钢铁》2013年第10期28-35,共8页Iron and Steel

基　　金：国家自然科学基金资助项目(50934009)

摘　　要：铸坯尺寸是影响电磁制动效果的重要因素。以某钢厂薄板坯CSP漏斗形结晶器为研究对象,建立了描述CSP漏斗形结晶器电磁制动的三维数学模型,研究宽度对电磁制动效果的影响。研究表明:3种铸坯宽度下,电磁制动均可使涡心位置上移并降低下部漩涡范围;电磁制动可降低自由液面水平方向流速,抑制弯月面波动,提高弯月面温度;在结晶器出口处,使用电磁制动可使铸坯宽面坯壳厚度更均匀并提高窄边凝固坯壳厚度;随铸坯宽度增加,电磁制动效果变得不明显。The slab size can strongly affect the effect of electromagnetic brake （EMBr）. Aiming at the compact strip production （CSP ） funnel-type mold in the industry, a three-dimensional mathematical model was developed to de- scribe the process of EMBr in the funnel-type mold. The results show that, the EMBr can raise the location of the vortices and make the lower recirculation zone smaller; the EMBr results in obvious reduction of horizontal velocity and the level fluctuation at the meniscus region, at the same time, increase the meniscus temperature; at the mold exit, the EMBr causes slightly more uniform shell growth of wide face and a slightly increase of the solidified shell thickness of narrow face; with the increase of the slab width, the effect of EMBr becomes not obvious.

关 键 词：薄板坯 漏斗形结晶器 电磁制动 数值模拟 

分 类 号：TG233[金属学及工艺—铸造]