摘要
为了解决某钢厂四流中间包内部钢液流动一致性较差的问题,对中间包挡墙的导流孔结构进行设计,并结合湍流抑制器,形成控流装置的组合结构,优化中间包流场。针对挡墙导流孔结构设计正交试验,通过水模拟试验获得各个方案的时间停留分布(RTD曲线),结合极差分析法和实际情况确定挡墙导流孔最优结构参数以及因素的影响程度。在此基础上设计不同结构的湍流抑制器,与挡墙组合,进行水模拟试验,最终获得了最优的生产方案。研究结果表明,方案U2为挡墙的最佳结构,导流孔参数为竖直倾角25°、直径140 mm、高度400 mm、水平倾角10°,该方案死区比例为17.83%,较原方案减小2.12%,流动一致性较原方案提升了84.61%;将多边型湍流抑制器与U2组合应用后,钢液流动行为最优,该方案死区比例为16.1%,较原型中间包减小3.85%,流动一致性提高71.54%。相对于单一的挡墙结构,U型挡墙+多边型湍流抑制器的组合结构能够有效减小死区比例,大幅降低了水口峰值浓度,延长峰值时间,使水口一致性增强,实现中间包内部流场的优化,为后续开发控流装置组合优化流场提供了理论依据。
In order to solve the problem of poor steel flow consistency inside the four-stream tundish of a steel plant,the guide hole structure of the tundish baffle is designed,and turbulence suppressors are added to form a combined structure of the flow control device to optimize the flow field of the tundish.Orthogonal tests are designed for the structure of baffle deflector holes,and the residence time distribution(RTD)curves of each scheme are obtained through water modeling to determine the optimal structural parameters of the baffle deflector holes as well as the degree of influence of factors by combining with the polar analysis method and the actual situation.On this basis,turbulence suppressors of different structures were designed and combined with the baffle for water modeling,and the optimal production scheme was finally obtained.The results show that the scheme U2 is the optimal structure of the baffle.The parameters of the guide hole are 25°of vertical inclination,140 mm in diameter,400 mm in height,and 10°of horizontal inclination for the optimal structure.The dead zone ratio of this scheme is 17.83%,which is 2.12%less than that of the original scheme,and the flow consistency is improved by 84.61%compared with that of the original scheme.The flow behavior of the steel is optimal after the polygonal turbulence suppressors are applied in combination with U2.The dead zone ratio of this scheme is 16.1%,which is 3.85%less than the prototype tundish,and the flow consistency is improved by 71.54%.Compared with a single baffle structure,the combined structure of U-type baffle and polygonal turbulence suppressors can effectively reduce the dead zone ratio and the standard deviation of the stagnation time,significantly reduce the peak concentration of the water outlet,extend the peak time,enhance the consistency of the water outlet,and achieve the optimization of the flow field inside the tundish,which provides the theoretical basis for the subsequent development of the optimization of the flow field of the combina
作者
霍佳
孙彦辉
李占春
陈远清
汪德伟
HUO Jia;SUN Yanhui;LI Zhanchun;CHEN Yuanqing;WANG Dewei(Collaborative Innovation Center of Steel Technology,University of Science and Technology Beijing,Beijing 100083,China;Technology Center,Jiangsu Yonggang Group,Suzhou 215600,Jiangsu,China)
出处
《连铸》
北大核心
2024年第5期30-38,共9页
Continuous Casting
基金
中央高校基本科研业务费资助项目(06930007)。
关键词
中间包
优化结构
挡墙
湍流抑制器
死区比例
tundish
structure optimization
baffle
turbulence suppressor
dead zone ratio
