六流T型中间包夹杂物去除行为的数值模拟  

Numerical simulation of inclusion removal behavior in six strand T-type tundish

作　　者：祝航航 王敏 姚骋[1] 包燕平 ZHU Hang-hang;WANG Min;YAO Cheng;BAO Yan-ping(State Key Laboratory of Advanced Metallurgy,University of Science and Technology Beijing,Beijing 100083,China;Technical Support Center for Prevention and Control of Disastrous Accidents in Metal Smelting,Beijing 100083,China)

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]北京科技大学金属冶炼重大事故防控技术支撑基地,北京100083

出　　处：《中国冶金》2022年第8期89-97,共9页China Metallurgy

基　　金：国家自然科学基金资助项目(51774031)。

摘　　要：以41 t圆坯连铸中间包为研究对象,运用ANSYS软件,结合流动模型、拉格朗日离散相模型模拟钢液流动和夹杂物行为。通过用户自定义函数为中间包钢渣界面的边界条件设置了一种新的判定标准,即根据夹杂物的受力情况判定夹杂物上浮去除或进入钢液。通过数值模拟计算中间包出口处夹杂物数密度,并与工业试验结果对比,发现新的判定标准较传统的捕捉(trap)边界条件具有更高的计算精度。基于上述模型计算了稳态浇铸过程中间包内不同粒径氧化铝夹杂物的上浮时间、上浮位置及去除率。上述结果为更好地研究中间包内夹杂物行为提供了支撑。Taking the 41-ton round billet continuous casting tundish as the research object,using ANSYS software,combined with the flow model and Lagrange discrete phase model,the molten steel flow and inclusions behavior were simulated.A new judgment standard was set for the boundary condition of the interface between steel and slag in the tundish through the user-defined function,that is,whether inclusions were removed or entered the molten steel was judged according to the force of inclusion.The number density of inclusions at the exit of tundish was calculated by numerical simulation,and compared with the results of industrial experiments.It is found that the model with new judgment standard has higher calculation accuracy than the traditional trap boundary condition.On this basis,the floating time,floating position and removal rate of Al_(2)O_(3) inclusion with different sizes in the steady state casting process were calculated.This thesis provided support for better study of the inclusion behavior in tundish.

关 键 词：氧化铝夹杂物 拉格朗日离散相模型 中间包 夹杂物上浮 去除率 

分 类 号：TF777[冶金工程—钢铁冶金]