六流对称中间包结构优化及死区体积模型  

Structural optimization and dead volume model of six-flow symmetric tundish

作　　者：李优梅 成国光 苗志奇 代卫星 任清学 舒友亮[2] LI Youmei;CHENG Guoguang;MIAO Zhiqi;DAI Weixing;REN Qingxue;SHU Youliang(State Key Laboratory of Advanced Metallurgy,University of Science and Technology Beijing,Beijing 100083,China;Electric Furnace Plant,Baoshan Iron and Steel Co.,Ltd.,Shanghai 201900,China)

机构地区：[1]北京科技大学钢铁冶金新技术国家重点实验室,北京100083 [2]宝山钢铁股份有限公司电炉厂,上海201900

出　　处：《连铸》2023年第6期78-85,99,共9页Continuous Casting

摘　　要：为优化流场促进夹杂物的上浮,以某钢厂六流T型对称中间包为对象,利用水模拟和数值模拟相结合的方法,研究中间包的流场特性,并建立死区体积模型来表征中间包内钢液的流动,针对性地提出改进方案。结果表明,原型中间包存在钢液停留时间较短,边部水口不活跃,死区体积分数高达30.9%,浇注过程存在“动能无效区”等缺陷。通过调整U型挡墙导流孔的上扬角度对其进行优化,优化后中间包内钢液的速度分布更均匀,实际平均停留时间增加了10.5 s,死区体积分数降低了13.3%,浇注过程中的“动能无效区”减少,水口的流动一致性提高,中间包整体混匀效果变好。In order to optimize the flow field and promote the floating of inclusions, a six-flow T-shaped symmetrical tundish in a steel plant was taken as the object and the combined method of water model and numerical simulation was used to study the flow field characteristics of the tundish, and a dead volume model was established to characterize the flow of molten steel in the tundish, and propose improvement plans in a targeted manner. The results show that the prototype tundish has defects such as short molten steel residence time, inactive edge nozzles, and a dead zone volume fraction of up to 30.9%. There are a large number of “kinetic energy invalid zones” in the pouring process. It is optimized by adjusting the upward angle of the diversion holes of the U-shaped retaining wall. After optimization, the velocity distribution of the molten steel in the tundish is more uniform, the actual average residence time increases by 10.5 s, and the dead zone volume fraction decreases by 13.3%. The “kinetic energy invalid area” of the tundish is greatly reduced, the flow consistency of the nozzle is improved, and the overall mixing effect of the tundish is improved.

关 键 词：六流中间包 结构优化 水模拟 数值模拟 死区 

分 类 号：TF341[冶金工程—冶金机械及自动化]