180 mm×610 mm板坯连铸结晶器内流场水模型及数值模拟  

Water flow field model and numerical simulation of 180 mm×610 mm slab continuous casting mold

作　　者：王伟 朱立光 张彩军 郑全 WANG Wei;ZHU Li-guang;ZHANG Cai-jun;ZHENG Quan(College of Metallurgy and Energy,North China University of Science and Technology,Tangshan 063210,Hebei,China;Refractory Department,Hebei Engineering Research Center of High Quality Steel Continuous Casting,Tangshan 063000,Hebei,China;Tangshan Jilong Industrial Co.,Ltd.,Tangshan 063017,Hebei,China;Hebei University of Science and Technology,Shijiazhuang 050018,Hebei,China;Steelmaking Department,Qian′an Iron and Steel Co.,Ltd.,Tangshan 064400,Hebei,China)

机构地区：[1]华北理工大学冶金与能源学院,河北唐山063210 [2]河北省高品质钢连铸工程技术研究中心,河北唐山063000 [3]唐山市吉隆实业有限公司耐材作业区,河北唐山063017 [4]河北科技大学,河北石家庄050018 [5]首钢股份公司迁安钢铁公司炼钢作业部,河北唐山064400

出　　处：《中国冶金》2020年第2期46-53,共8页China Metallurgy

摘　　要：以北方某钢厂断面为180 mm×610 mm板坯连铸结晶器为原型,针对其生产过程中出现的表面流速波动较大、易卷渣等问题,采用Fluent数值模拟软件,对其浸入式水口底部结构、浸入深度和拉速等工艺参数进行了优化研究,并对数值模拟结果进行了冷态水模拟验证。结果表明,当不改变浸入式水口底部结构,水口浸入深度为100 mm时,拉坯速度应不超过1.45 m/min;当拉坯速度提升至1.55 m/min时,水口浸入深度应保持在120~130 mm时较为合适;若要保持原有工艺条件(拉速为1.55 m/min、浸入深度为100 mm)不变的情况下,应将水口底部结构改为凹槽深度为10 mm的凹面水口,此时结晶器表面流速较为适宜。A slab mold with a section of 180 mm×610 mm in a steel company in north China was taken as the prototype. In view of the problems such as large fluctuation of surface velocity and easy slag entrapment in the production process, the Fluent numerical simulation software was used to optimize the process parameters such as the bottom geometric structure of the submerged entry nozzle, the immersion depth and the casting speed of the immersion nozzle, and the numerical simulation results were verified by the cold water simulation. The results showed that when the bottom structure of the nozzle was not changed, and the immersion depth of the nozzle was 100 mm, the casting speed should be below 1.45 m/min. When the casting speed was increased to 1.55 m/min, the immersion depth should be kept at 120-130 mm. In order to maintain the original process conditions(casting speed of 1.55 m/min, immersion depth of 100 mm), the bottom structure of the nozzle should be changed to a concave nozzle with a groove depth of 10 mm. At this time, the surface velocity of the mold was suitable.

关 键 词：板坯 结晶器 流场 数值模拟 水模拟 

分 类 号：TF777[冶金工程—钢铁冶金]