静止钢液中影响钢包孔口处底吹气泡的因素  

Influencing factors of bottom blowing bubbles at ladle orifice in static liquid steel

作　　者：周海忱 田钱仁 董立山[1] 李福坤[1] 王国承[1] ZHOU Haichen;TIAN Qianren;DONG Lishan;LI Fukun;WANG Guocheng(School of Materials and Metallurgy,University of Science and Technology Liaoning,Anshan 114051,China)

机构地区：[1]辽宁科技大学材料与冶金学院,辽宁鞍山114051

出　　处：《辽宁科技大学学报》2016年第5期333-338,共6页Journal of University of Science and Technology Liaoning

基　　金：辽宁省自然科学基金(2015020181)

摘　　要：运用气泡形成的两阶段模型,分析在一定气体流量下,静止钢液中通过钢包孔口连续溢出气泡的形成过程。通过MATLAB编程计算得到气泡的脱离直径。对影响气泡脱离尺寸的气体流量、孔口直径和表面张力因素进行分析,并将气泡直径的理论计算值与数值模拟结果进行比较。从理论计算结果以及与数值模拟对比得出:随着气体流量的逐渐增大,气泡的脱离直径总体变化趋势为由缓慢增大到迅速增大;在较小的气体流量下,气泡脱离直径受孔口直径和表面张力影响显著,随着流量的增加其影响越来越小;孔口边缘的润湿性对气泡脱离尺寸的大小起决定性作用。The formation process of bubble at orifice in static liquid steel under constant gas flow rate was analyzedby the two stage model. The diameter of bubble was obtained by calculating with software packageMATLAB. The influences of gas flow rate, orifice diameter and surface tension on bubble sizes were analyzed,and the bubble diameter between the theoretical and numerical simulation results were compared. The comparisonbetween the calculate results and the numerical simulation indicate that the diameter of the bubbles will increaseas the gas flow rate increases. The bubble diameters grew slowly at the beginning, then sharply as thecontinuously increasing of the gas flow rates. The effect of orifice diameter and the surface tension on bubblediameters are significant under the low gas flow rate, but it gets weak with the increases of the flow rates. Wettabilityon the edge of orifice has decisive impact on bubble sizes.

关 键 词：气泡 二阶段模型 钢液 孔口直径 润湿性 

分 类 号：TF769.2[冶金工程—钢铁冶金]