底吹中间包气泡形成过程的数模研究  

Numerical study of bubble formation on tundish bottom with gas blowing

作　　者：黄奥[1] 汪厚植[1] 张美杰[1] 顾华志[1] 张慧民[2] 

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,湖北武汉430081 [2]唐山钢铁股份有限公司,河北唐山063016

出　　处：《武汉科技大学学报》2007年第4期353-356,共4页Journal of Wuhan University of Science and Technology

基　　金：国家科技攻关计划项目(2005BA325C)

摘　　要：采用两阶段模型,使用MATLAB语言编程,对中间包气幕挡墙砖中气泡的形成过程进行了数学模拟,研究了影响气泡大小的因素。结果表明:中间包内所形成气泡的大小主要受气体流量、钢液流速和气孔直径的影响。气泡直径随气体流量的增大而增大,随钢水流速的增大而减小,随气孔直径的增大而增长。孔径增大对气泡直径的影响较明显,孔径较小且只在较小范围内波动时,钢液流速和气体流量是主要影响因素。A two-stage model was applied and MATLAB was employed for numerical simulation of bubble formation in the permeable brick in the tundish with gas flowing at the bottom. Factors that affect the bubble size were investigated. It was found that： the bubble size increases with the increase of gas flow rate or pore size, and it also increases with the decrease of shearing liquid velocity. The shearing liquid velocity and gas flow rate are the major influencing factors while the pore size is not so significant. However, under the condition of low gas flow rate and high shearing liquid velocity, the pore size becomes very influential.

关 键 词：中间包 气幕挡墙砖 气泡形成 数学模拟 

分 类 号：TF777.1[冶金工程—钢铁冶金]