挡渣墙对板坯连铸中间包流场的影响研究  

Research on the Effect of Slag wire on Fluid Flow in Tundish for Slab Continuous Casting

作　　者：李宁[1] 包燕平[1] 林路[1] 王敏[1] 赵立华[1] 

机构地区：[1]北京科技大学冶金与生态工程学院冶金新技术国家重点实验室,北京100083

出　　处：《钢铁钒钛》2014年第3期83-87,共5页Iron Steel Vanadium Titanium

摘　　要：针对中间包水口冲击区钢流对自由液面扰动较大,会形成环流将大型夹杂物卷入浇注区的问题,某钢厂在原有控流装置的基础上,计划引入挡渣墙以防止该情况的发生。通过中间包水模型试验,研究了距包底不同高度和距水口冲击区不同距离时挡渣墙对中间包流场参数的影响。结果表明,设置挡渣墙有利于延长钢液在中间包内运动轨迹,峰值时间提高40.9%,但是,死区体积比增加6.2%;挡渣墙距离水口冲击区1 680 mm,下端距中间包包底400 mm时,有利于控制死区体积比,同时有效发挥其控制大型夹杂物进入浇注区的作用。Based on the problem that slag- steel interface is strongly disturbed by the steel flow in steel impact zone thus leading to circumfluence and entrapping large inclusions into the pouring zone,installation of a slag wire in combination with original flow control devices in tundish was proposed. The effect of slag wires with different heights from the bottom and different positions from the poring zone was investigated by a water model experiment in this paper. The results show that a slag wire contributes to extending the residence time in tundish and the peak time increases by 40. 9%,however,the dead zone in tundish increases by 6. 2%,too. The water model experiment proved that installation of a slag wire which is1 680 mm distance from the impact zone and 400 mm from the bottom is sufficient to suppress the dead zone in tundish and inhibit large inclusions entering the pouring zone.

关 键 词：中间包 水模型 挡渣墙 流场 死区 

分 类 号：TF777[冶金工程—钢铁冶金]