转炉顶吹过程渣-金-气三相作用特性  

Slag-metal-gas interaction characteristics of top-blown BOF steelmaking process

作　　者：李明明[1,2] 李强[1,2] 邹宗树[1,2] 

机构地区：[1]东北大学材料与冶金学院,辽宁沈阳110819 [2]东北大学多金属共生矿生态利用教育部重点实验室,辽宁沈阳110819

出　　处：《钢铁研究学报》2015年第4期19-24,共6页Journal of Iron and Steel Research

基　　金：国家自然科学基金资助项目(51104037);中央高校基本科研业务费专项资金资助项目(N120402010)

摘　　要：基于VOF界面追踪技术,建立了氧气转炉顶吹过程渣-金-气多相传输行为的数学模型,研究了渣-金-气三相界面行为,给出了渣/金界面特征的演化过程和熔池内流场变化特征,对冲击坑形态进行了具体的描述,并对穿透深度和冲击坑直径进行了定量化的表征。结果表明:由于冲击坑表面波的传播,冲击坑以及渣/金/气界面具有明显的瞬态特征且熔池是振荡的;钢液熔池内涡旋中心位置随着吹炼时间以及渣的运动而变化;低枪位加强了钢液表面的波动,增加了钢液表面的粗糙度,增大了射流与熔池的接触面积,从而有利于射流向熔池的动量传递,促进熔池的搅拌。Based on VOF interface tracking technique, a mathematical model of slag-metal-gas multiphase transport in a top-blow oxygen steelmaking convertor was developed. The interface behavior of slag-metal-gas and their evo- lution with blowing time were investigated. The flow field in bath and the shape of cavity were shown, and pene- tration depth as well as impact area was characterized quantitatively. The results show that the shape of depression and interface of slag-steel-gas are found to be instable and oscillatory with blowing time due to propagation of waves in cavities. The circulation of molten bath is formed, and the position of vortex changes with blowing time and interface movement. For low operating lance height, the fluctuation of steel surface is enhanced, the rough ness of steel surface is increased, and the contacting area between jets and bath is increased. As a result, it is help- ful for momentum transfer from jets into bath and therefore the favorable stir of bath.

关 键 词：顶吹转炉 VOF 三相流动 数值模拟 

分 类 号：TF721[冶金工程—钢铁冶金]