摘要
针对铸坯中非金属夹杂物超标的问题,以某钢厂五流对称150 mm×150 mm方坯连铸中间包为研究原型,采用数值模拟的方法研究不同控流装置对中间包内流场的影响,并得到最优的挡墙结构。结果表明,原型中间包存在停留时间短,死区比例大,持续流动的钢液对中间包包壁冲刷侵蚀的问题;采用优化后的U型挡墙后,停留时间延长了257.11s,死区比例减小27.31%,且各水口均匀性明显改善。现场试验发现:中间包优化后T[O]含量降低45.81%,大颗粒夹杂物含量明显降低。
In view of excessive non-metallic inclusion content in a five-strands symmetric casting 150 mm× 150 mm bloom,the effect of different flow control devices on flow field of liquid in tundish has been studied by means of numerical simulation in order to get optimum baffle. The results reveal the prototype tundish presents the problems such as short average residence time,large dead zone and erosion in the tundish by molten steel. When using the optimum new U-type baffle,average residence time increased by257. 11 s and dead area volume fraction decreased by 27. 31%,the standard deviation of average residence time of each nozzle was smaller. Field experiment results shows that T[O]in liquid in tundish decreases by 45. 81% and the amount of large inclusions decreases considerably.
出处
《钢铁钒钛》
CAS
北大核心
2015年第1期98-102,共5页
Iron Steel Vanadium Titanium
关键词
五流中间包
数值模拟
流场
挡墙
挡坝
tundish of five-strand casting
numerical simulation
flow field
baffle
dam
