底吹氩VD钢包炉流场优化的数值模拟研究  

Study on numerical simulation for flow field optimization in argon blowing VD ladle

作　　者：刘崇林 宋思程 孙彦辉 安航航 周律敏 梁龙清 龙连 Liu Chonglin;Song Sicheng;Sun Yanhui;An Hanghang;Zhou Lvmin;Liang Longqing;Long Lian(Guangxi Liuzhou Iron and Steel(Group)Company,Liuzhou 545002,Guangxi,China;Collaborative Innovation Center of Steel Technology,University of Science and Technology Beijing,Beijing 100083,China)

机构地区：[1]广西柳州钢铁集团有限公司,广西柳州545002 [2]北京科技大学,钢铁共性技术协同创新中心,北京100083

出　　处：《钢铁钒钛》2021年第4期117-123,共7页Iron Steel Vanadium Titanium

基　　金：国家自然科学基金(51774030,U1860104)资助项目。

摘　　要：以某钢厂150 t VD钢包炉为研究对象,采用商业软件Ansys-Fluent,建立钢包底吹氩气模型,结合正交设计方法,模拟了不同钢液量,两个吹氩口不同吹氩量工艺条件下钢包内流场和流速变化,同时考虑了静置10 min后钢包炉内钢液流动情况。所有试验均监测钢包下部同一位置的速度大小,通过正交设计方法选择最优的生产方案。研究结果表明:钢包内钢液量和底吹氩气量在小范围内变动对钢包内钢液流场和流速影响不大,且钢液量和氩气口吹氩量对静置10 min后钢液内流场流速的影响可以忽略不计。吹氩量过大会导致渣眼开度较大引起卷渣和吸气现象,吹气量过小钢液流速较低则导致形成稳定循环流场所需时间较长。最终通过对比分析得出在钢液高度选用3590 mm,1#和2#氩气口流量均采用0.9 m^(3)/h时钢包炉内综合流动效果较好,减少了钢水受污染程度,提高了生产效率。Taking a steel plant VD ladle furnace as research object and using commercial software ANSYS-Fluent,a 150 t ladle bottom-blown argon gas model was established to simulate different molten steel volumes and two argon-blowing ports with different argon-blowing volume.The flow field and velocity were changed,and the flow of molten steel in ladle furnace after standing for 10 minutes was also considered.All tests monitored the speed of same position at lower part of ladle,and selected the optimal production plan through the orthogonal design method.The results show that variation of molten steel volume and bottom-blown argon flow in ladle within a small range have little effect on flow field and flow velocity of molten steel in ladle.And the influence of steel and argon blowing volume on the internal flow field after standing for 10 minutes is negligible.Excessive argon blowing will result in a larger slag hole opening,which will cause slag entrapment and gas suction.If the blowing amount is too small,lower flow rate of molten steel will result in a longer time for the formation of a stable circulating flow field.Finally,through comparative analysis,it is concluded that when the height of molten steel is 3590 mm and the flow rate of No.1 and No.2 argon ports are both 0.9 m^(3)/h,the comprehensive flow effect in ladle furnace is better,which reduces contamination degree of molten steel and improves production efficiency.

关 键 词：VD钢包炉 底吹氩 流场 数值模拟 两相流 吹氩期 静置期 

分 类 号：TF044[冶金工程—冶金物理化学]