40t钢包单透气砖底搅拌流场研究  

FLOW FIELD RESEARCH ON BOTTOM ARGON BLOWING OF 40 TON LADLE

作　　者：周同军[1] 刘军占[1] 罗辉[1] Zhou Tongjun Liu Junzhan Luo Hui(Baosteel Special Steel Co. ,Lt)

机构地区：[1]宝钢特钢有限公司

出　　处：《河南冶金》2016年第5期6-10,38,共6页Henan Metallurgy

摘　　要：通过计算机数值模拟与水模拟实验模拟钢包底搅拌情况,研究单吹氩钢包的不同吹气流量、不同吹气位置(0R、0.56R、0.62R、0.67R)与钢包混匀时间、渣眼的相互关系,以达到提升氩气搅拌效率的目的。研究表明,钢包混匀时间随透气砖偏心距的增加而减小,当透气砖位于0.62R^0.67R时,搅拌效果最优;当氩气流量由70 L/h增加至130 L/h时,混匀时间随吹气量的增加而明显减小,当流量超过130 L/h时搅拌效果趋于平稳,对混匀时间影响不大;渣眼面积随偏心距的增加而增大,在喷嘴位置靠近壁面时较大;壁面剪切力随偏心距的增加逐渐向靠近喷嘴一侧壁面的上方集中(即对壁面冲刷最严重的位置),平均壁面剪切力随偏心距的增加呈指数形式增大。In order to improve argon blowing efficiency in a 40-ton ladle,numerical simulation and water simulation experiments of the bottom argon flow were performed. Relationships between the ladle mixing time,slag eye,and different blowing flow rates,and different blowing positions（0R,0. 56 R,0. 62 R,0. 67R） are discussed. Results show that the ladle mixing time decreased when the argon blowing brick distance（from bottom center of the ladle） increased,the 0. 62 R ~0. 67 R is the best argon position for stirring,and decreased significantly when the blowing flow increased from 70 to130 L/h. When the blowing flow increased and exceeded 130 L/h,the stirring effect tended to be stable,and there was little effect on the ladle mixing time. The slag eye area increased as the argon brick distance increased,and was larger when the argon blow brick was near the ladle wall. Wall shear stress significantly increased as the brick distance increased and was concentrated at the slag wall near the argon flow brick; this is called the most serious erosion wall. The average wall shear increased exponentially with increasing argon blowing brick distance.

关 键 词：数值模拟 钢包 渣眼 混匀时间 

分 类 号：TF769[冶金工程—钢铁冶金]