论文部分内容阅读
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。
Aiming at the problem that the non-metallic inclusions in the slab exceed the standard, a five-flow symmetrical 150 mm × 150 mm billet continuous casting tundish for a steel mill is taken as the prototype. The numerical simulation is used to study the influence of different flow control devices on the flow field in the tundish The influence and get the best retaining wall structure. The results show that the prototype tundish has the problems of short residence time, large proportion of dead zone and continuous flow of molten steel erosion erosion of the tundish wall. Using the optimized U-shaped retaining wall, the residence time is extended 257.11s, dead zone The proportion is reduced by 27.31%, and the uniformity of each nozzle is obviously improved. Field tests showed that the content of T [O] decreased by 45.81% after tundish optimization, and the content of large-grain inclusions decreased obviously.