转炉底吹供气方式对熔池搅拌的影响  

Influence of bottom blowing gas supply mode on bath stirring in converter

作　　者：刘小亮[1] 曾加庆[1] 马登[1] 杨利彬[1] 王杰[1] 董睿[1] 

机构地区：[1]钢铁研究总院冶金工艺研究所,北京100081

出　　处：《钢铁研究学报》2017年第12期990-996,共7页Journal of Iron and Steel Research

摘　　要：为探究复吹转炉底吹供气方式对转炉搅拌效果的影响,采用水模拟方法研究了转炉底吹流量分配比、切换频率及分组模式对渣-金界面传质与混匀的影响。实验结果表明:流量分配比、切换频率及分组模式都会使渣-金界面的传质系数与混匀时间发生改变。在连续模式下,底吹流量分配比选择4时,传质效果最优;流量分配比选择5时,混匀时间最小。在间隔模式下,底吹流量分配比选择3时,传质效果最优;流量分配比选择4时,混匀时间最小。传质系数随切换频率的增加而减小。流量分配比对连续模式传质系数的影响比间隔模式大,2种模式下混匀效果接近。连续模式下底吹会导致炉衬侵蚀不均,大流量侧会加速炉衬侵蚀和两相乳化过程,小流量侧则相反。In order to research the stirring effect on bottom blowing gas supply mode in combined blowing converter,the effect of bottom blowing flow rate distribution,switching frequency and grouping mode on mass transfer between slag-metal interface and mixing time was investigated.The study indicates that both mass transfer coefficient and mixing time change with the bottom blowing flow rate distribution,switching and grouping mode.Under continuous mode with distribution ratio as 4,the mass transfer effect reaches best;when set distribution ratio as5,mixing time reaches smallest.Under spaced mode with distribution ratio as 3,the mass transfer effect reaches best;when set distribution ratio as 5,mixing time reaches smallest.Mass transfer coefficient decreases with increases of switching frequency.Distribution ratio has greater effect on mass transfer coefficient under continuous mode than spaced mode.Both modes are almost identical on mixing effect.In continuous mode,bottom blowing leads to uneven erosion,large flow side accelerates the lining erosion and two-phase emulsion process,while the small flow side is opposite.

关 键 词：水模拟 流量分配比 切换频率 传质系数 混匀时间 

分 类 号：TF713[冶金工程—钢铁冶金]