五流大方坯中间包控流装置优化的数值和物理模拟  

Numerical and Physical Simulation on Optimization of Flow Control Devices in Tundish for Five-Strand Bloom Casting

作　　者：罗荣华[1] 倪红卫[1] 张华[1] 赵中福 陈迪庆 

机构地区：[1]武汉科技大学钢铁冶金及资源利用省部共建教育部重点实验室,武汉430081 [2]武汉钢铁股份公司条材总厂一炼钢分厂,武汉430083

出　　处：《特殊钢》2012年第4期13-17,共5页Special Steel

摘　　要：针对280 mm×350 mm五流连铸35 t中间包第3流铸坯质量探伤不合格率较高的问题,采用数值模拟和几何相似比1：3水模型模拟,研究了控流装置对中间包钢液流动特性的影响,优化中间包流场。结果表明,原型中间包控流装置结构不合理,各流一致性差,尤其第3流短路流明显;采用中墙开两孔的2~#挡墙＋圆形加檐的B型湍流控制器后,各流一致性明显改善,第3流短路流消除,其平均停留时间延长了242.1 s,同时中间包活塞区体积增加了5.7%,死区体积减小了1.1%,冲击区钢液流动平稳。In accordance with the status of high reject rate in nondestructive test of third strand bloom casting with a 35 t tundish for five-strand 280 mm x 350 mm blooms, the effect of different flow control device on flow characteristics of liquid in tundish has been studied by numerical simulation and water model simulation with geometrical similarity ratio 1 ： 3 to optimize the tundish flow field. Results show that the structure of flow control device of original tundish is not reasonable, the each strand is out of step especially the short circuit flow in No3 strand is obvious ; after using 2^# baffle with two diversion holes at wall middle ＋ round B type turbulence controller with eaves, the each strand is in step and the short circuit flow in No3 strand is eliminated its average residence time is prolonged by 242. 1 s, and in tundish the plug zone flow volume increases by 5.7% , the dead zone volume decreases by 1.1% , the impact zone flow is steady and smooth.

关 键 词：中间包 数值模拟 水模型 流场 平均停留时间 

分 类 号：TF777[冶金工程—钢铁冶金]