气幕挡墙中间包钢水流动的数值模拟  

Numerical Simulation of Molten Steel Flow in Tundish with Gas Curtain

作　　者：张美杰[1] 汪厚植[1] 黄奥[1] 顾华志[1] 刘定群[1] 

机构地区：[1]武汉科技大学湖北省耐火材料与高温陶瓷重点实验室,武汉430081

出　　处：《特殊钢》2006年第1期30-32,共3页Special Steel

基　　金：国家科技攻关计划项目(2005BA325C);省部共建国家重点实验室基金资助项目(J30411)

摘　　要：根据二流连铸1 500 mm×250 mm板坯时中间包的操作工艺参数,采用欧拉两流体模型,多孔介质模型和拉格朗日随机轨道模型,模拟计算了采用湍流控制器和气幕挡墙技术的中间包内钢液流动特性和夹杂物的运动轨迹,并用Monte-Carlo法统计了夹杂物的总去除率。模拟结果表明,采用中间包气幕挡墙技术可以有效改善钢液的流动特性,延长钢液停留时间,减小死区体积;当吹气量为0.90 m3/h时,夹杂物去除率比不吹气工艺增加15.6%。Based on operation process parameters of tundish for two strand concasting 1 500 mm × 250 mm slab, using Eulerian multiphase model, porous media model and Larangian random-trajectory model, the characteristics of molten steel flow and inclusion moving trace in tundish with turbulence inhibitor and gas blowing curtain technology have been simulated mathematically, and the total removal ratio of inclusion in steel was calculated statistically by Monte-Carlo method. The simulation results showed that the technology of gas curtain was available to effectively improve the featttre of molten steel flow and prolong residence time of molten steel, reduce the volume of dead zone; and as gas blowing rate was 0.90m^3/h the removal ratio of inclusion increased by 15.6% compared that with non-gas blowing.

关 键 词：中间包 气幕挡墙 精炼 数值模拟 

分 类 号：TF777[冶金工程—钢铁冶金]