基于中间包冲击区的流场优化  

Flow field optimization based on tundish impact zone

作　　者：王锦 刘宇航 刘威[1] 杨树峰[1,2] 李京社 赵梦静[3] WANG Jin;LIU Yu-hang;LIU Wei;YANG Shu-feng;LI Jing-she;ZHAO Meng-jing(School of Metallurgical and Ecological Engineering,University of Science and Technology Beijing,Beijing 100083,China;State Key Laboratory of Advanced Metallurgy,University of Science and Technology,Beijing 100083,China;Metallurgical and Building Materials Business Department,China International Engineering Consulting Corporation,Beijing 100048,China)

机构地区：[1]北京科技大学冶金与生态工程学院,北京100083 [2]北京科技大学钢铁冶金新技术国家重点实验室,北京100083 [3]中国国际工程咨询有限公司冶金建材业务部,北京100048

出　　处：《中国冶金》2023年第4期97-103,共7页China Metallurgy

基　　金：国家自然科学基金资助项目(52074030,52104318);中央高校基本科研业务费资助项目(FRF-TP-20-008A1)。

摘　　要：针对某厂中间包原型在实际生产过程中生产平稳性以及产品洁净化等方面的问题,结合数值模拟和物理模拟的方法,对中间包进行了结构优化。对单因素变量(冲击区体积以及导流孔孔径、倾角)进行分类单因素优化,并以出口温差和死区比例的一致性变化规律作为进一步复合优化指导,确定了较优的中间包结构参数。结果表明,复合因素的优化效果大于单因素,并且中间包冲击区的体积大小对流体的流动状态影响最大,导流孔孔径次之,倾角最小。确定了1号挡墙移动450 mm、导流孔孔径选择100 mm、导流孔K-1和K-2倾角选择20°以及导流孔K-3移动50 mm、倾角选择10°的较优方案。该方案的死区比例为16.27%,相较于原型降低了29.03%,远流端和近流端的出口最大温差由原型1.6 K降至0.6 K,进一步提高了中间包流场的均匀性。这为该厂实际中间包优化提供了理论依据,也可为同类中间包优化提供思路和结构参数的参考。Aiming at the problem of production stability and product purification for a factory tundish prototype in the actual production process,the structure of tundish was optimized by combining numerical simulation and physical simulation.The single-factor variables(the impact zone,aperture diameter of diversion hole and inclination of diversion hole)were classified as single-factor optimization,and the consistency change law of outlet temperature difference and dead zone ratio was used as guide for further composite optimization,and the optimal tundish structure parameters were determined.The results show that the optimization effect of composite factor is greater than that of single factor,and the volume size of tundish impact zone has the greatest influence on the flow state of fluid,followed by the aperture size of guide aperture and the smallest inclination.The optimal scheme of moving the No.1 retaining wall by 450 mm,selecting the aperture of diversion aperture by 100 mm,selecting the inclination angle of diversion hole K-1 and K-2 by 20°,and moving the diversion hole K-3 by 50 mm and the inclination angle of 10°was determined.The dead band ratio of this scheme is 16.27%,which is 29.03%lower than that of the prototype,and the maximum temperature difference between the outlet of far and near end is reduced from 1.6 K to 0.6 K of the prototype,which further improves the uniformity of tundish flow field.This provides a theoretical basis for the actual tundish optimization of the plant,and also aims to provide optimization ideas and structural parameters for the optimization of similar tundish enterprises.

关 键 词：中间包 工艺优化 数值模拟 物理模拟 冲击区体积 

分 类 号：TF777[冶金工程—钢铁冶金]