基于OpenFOAM的中间包去除夹杂物的数值模拟  

Numerical simulation of tundish removal of inclusions based on OpenFOAM

作　　者：李庚阳 王汝栋 刘金瑞 崔衡 LI Gengyang;WANG Rudong;LIU Jinrui;CUI Heng(Collaborative Innovation Center of Steel Technology,University of Science and Technology Beijing,Beijing 100083,China)

机构地区：[1]北京科技大学钢铁共性技术协同创新中心,北京100083

出　　处：《连铸》2025年第1期48-55,共8页Continuous Casting

基　　金：中央高校基本科研业务费资助项目(FRF-BD-23-01)。

摘　　要：在连铸过程中,中间包在控制夹杂物的数量、提高铸坯质量方面具有重要的作用。采用数值模拟的方法,利用开源的计算流体力学软件OpenFOAM建立了三维数学模型,分析了非金属夹杂物粒径、钢液流量和非金属夹杂物形状对中间包中非金属夹杂物去除率的影响。结果表明,随着非金属夹杂物粒径的减小,非金属的夹杂物的去除率逐渐降低,当钢液流量为0.47 m^(3)/min,粒径为200μm的非金属夹杂物的去除率达到97.64%,粒径为10μm的非金属夹杂物的去除率只有1.298%;当夹杂物的粒径小于100μm时,随着粒径的增大,其去除率显著提升;夹杂物的粒径超过100μm,其粒径的增大对去除率的提升效果变得不明显。随着钢液流量的增加,非金属夹杂物的去除率呈下降趋势,钢液流量对粒径为50、75和100μm的非金属夹杂物的去除率的影响较大,对200、10和25μm的非金属夹杂物的去除率影响较小;随着形状因子的降低,非金属夹杂物的去除率呈下降趋势,其中球形非金属夹杂物(形状因子为1)的去除效果最好,当非金属夹杂物的等效直径小于100μm时,随着非金属夹杂物等效直径的降低,形状因子对夹杂物的去除率影响逐渐减小。In the continuous casting process,tundish plays an important role in controlling the number of inclusions and improving the quality of the casting billet.A three-dimensional mathematical model was established by using the open-source computational fluid dynamics software OpenFOAM by numerical simulation,and the effects of particle size,molten steel flow rate and shape of non-metallic inclusions on the removal rate of non-metallic inclusions in tundish were analyzed.The results show that with the decrease of the particle size of the inclusions,the removal rate of non-metallic inclusions gradually decreases.When the flow rate of molten steel is 0.47m^(3)/min,the removal rate of non-metallic inclusions with a particle size of 200μm reaches 97.64%and the removal rate of non-metallic inclusions with a particle size of 10μm is only 1.298%.When the particle size of the inclusions is less than 100μm,the removal rate increases significantly with the increase of particle size;and when the particle size of inclusions exceeds 100μm,the increase of particle size has no obvious effect on the removal rate.With the increase of molten steel flow,the removal rate of non-metallic inclusions showed a decreasing trend,and the molten steel flow rate had agreater effect on the removal rate of non-metallic inclusions with particle sizes of 50μm,75μm and 100μm,but had little effect on the removal rate of non-metallic inclusions at 200μm,10μm and 25μm.With the decrease of the shape factor,the removal rate of non-metallic inclusions showed a decreasing trend,and the removal effect of spherical non-metallic inclusions(shape factor 1)was the best.And when the equivalent diameter of non-metallic inclusions was less than 100μm,the influence of shape factor on the removal rate of inclusions gradually decreased with the decrease of the equivalent diameter of non-metallic inclusions.

关 键 词：中间包 数值模拟 非金属夹杂物 形状因子 流场 

分 类 号：TF777[冶金工程—钢铁冶金]