描述底吹氩钢包内钢液混合效果的特征数方程  

Characteristic number equation about describing mixing effect of steel stirred by argon in the ladle

作　　者：韩建军[1] 李士琦[2] 吴龙[2] 

机构地区：[1]清华大学环境学院,北京100084 [2]北京科技大学冶金与生态工程学院,北京100083

出　　处：《重庆大学学报（自然科学版）》2012年第1期76-80,共5页Journal of Chongqing University

基　　金：国家科技支撑计划资助项目(2007BAF08B01-03)

摘　　要：首先对钢包底吹氩气搅拌钢液系统进行分析,确定对搅拌效果有影响的诸多因素。采用量纲分析方法,得到描述底吹氩钢包内钢液混合效果的特征数方程模型。以某钢厂LF炉钢包为原型,应用广义相似原理进行水力学模拟实验研究。实验结果经逐步回归分析得出适用于描述与研究中几何相似的钢包炉内钢液受搅拌后混合效果的特征数方程。研究结果表明,本研究考虑的4个决定性特征数对被决定性特征数H0均有显著性影响,其中最为显著的是气液密度比πρ;进行钢包底吹氩搅拌钢液的水力学模拟研究时,若采用某种常规气体代替原型中的氩气,模型与原型间被决定性特征数的值会产生较大的差异。By analyzing the system of argon stirring molten steel in ladle, many affecting factors are determined. The model of characteristic number about describing mixing effect of steel stirred by argon in the ladle is gotten by dimensional analysis. Taking a ladle furnace of some steel plant as prototype, hydraulics simulation experiment is designed by generalized similarity principle. The equation for characteristic number about the mixing effect of steel in the ladle is gotten by stepwise regression, which is suitable for ladles whose geometric structure are similar to the ladle in this study. The results could be gotten as follows. The four decisive characteristic numbers that are considered are all significantly effective to H0. And gas-liquid density ratio πρ is the most remarkable among them. When doing some hydraulics experiment to simulate the phenomenon of molten steel stirred by argon from the bottom of ladle, using some conventional gas instead of argon could result in a great difference between the decided characteristic numbers of model and prototype.

关 键 词：炼钢 精炼 钢包 搅拌 混合 

分 类 号：TF769.2[冶金工程—钢铁冶金]