中间包结构优化对钢液流动状态的影响  

Effect of tundish structure optimization on flow state of molten steel

作　　者：李顶涵 段豪剑 孙亮[2] 张立峰 LI Dinghan;DUAN Haojian;SUN Liang;ZHANG Lifeng(School of Metallurgical and Ecological Engineering,University of Science and Technology Beijing,Beijing 100083,China;Qianshun Technology Center,Beijing Shougang Co.,Ltd.,Beijing 100043,China;School of Mechanical and Materials Engineering,North China University of Technology,Beijing 100144,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]北京首钢股份有限公司迁顺技术中心,北京100043 [3]北方工业大学机械与材料工程学院,北京100144

出　　处：《中国冶金》2024年第8期38-50,82,共14页China Metallurgy

基　　金：国家重点研发计划资助项目(2023YFB3709900);国家自然科学基金资助项目(U22A20171)。

摘　　要：为了去除夹杂物,提高钢液洁净度,有必要对中间包进行结构优化以改善中间包内部钢液的流动状态。通过物理模拟或数值模拟获得停留时间分布(RTD)曲线,并进一步对停留时间和流场区域进行分析是中间包结构优化的重要手段。通过调研将不同文献中单流或者两流中间包的数据转化成无量纲数并筛选、整理、总结,分析了中间包本体的宽度、液位高度、入出口间距、侧壁倾角,中间包湍流抑制器的高度、横截面积以及挡墙和挡坝的位置、高度等结构参数对停留时间和流场的影响,总结归纳了中间包本体和控流装置不同结构参数的最佳比例。研究发现,中间包的宽度与长度之比应为0.15~0.30,液位高度与长度之比应为0.15~0.30,入出口间距与长度之比应为0.8~0.9,侧壁倾角应为10°~15°;湍流抑制器高度与中间包液位高度之比应为0.1~0.2,横截面积与中间包底部横截面积之比应约为0.15,挡墙与长水口之间的距离与中间包长度之比应约为0.2,挡坝高度与中间包液位高度之比应约为0.4或0.7,挡墙与挡坝之间的距离与中间包长度之比应为0.05~0.10,挡坝高度与中间包液位高度之比应约为0.3。研究结果为中间包的结构设计提供了一定程度的指导。In order to remove inclusions and improve the cleanliness of the molten steel,it is necessary to optimize the structure of the tundish to improve the flow state of the molten steel inside the tundish.The RTD(Residence Time Distribution)curve obtained by physical or numerical simulation is an important method for optimizing the structure of tundish through analyzing the residence time and flow field region.Dimensionless quantities were con-verted by filtering,organizing and summarizing the data of single or two strand tundishes through literature re-search.The effects of structural parameters such as the width,liquid level height,inlet-outlet spacing,sidewall in-clination angle of tundish,the height and cross-sectional area of the turbulence inhibitor,as well as the position and height of the weir and dam on residence time and flow field were summarized.The optimal ratios of different struc-tural parameters for tundish and flow control devices were also summarized.The results show that ratio of width to length of the tundish should be 0.15-0.30,ratio of liquid level height to tundish length should be 0.15-0.30,ratio of inlet-outlet spacing to tundish length should be 0.8-0.9,and the inclination angle of tundish sidewall should be 10°-15°.For turbulence inhibitors,ratio of turbulence inhibitor height to liquid level height should be 0.1-0.2 and ratio of its cross-sectional area to cross-sectional area of tundish bottom should be close to O.15.The ratio of dis-tance between weir and shround to length of tundish should be close to O.2,the ratio of height to liquid level should be close to 0.4 or 0.7,ratio of distance between weir and dam to length of tundish should be 0.05-0.10,and ratio of dam height to liquid level should be around o.3.The results provide a certain degree of guidance for the structural design of thetundish.

关 键 词：中间包 停留时间 流场 湍流抑制器 挡墙 挡坝 

分 类 号：TF777[冶金工程—钢铁冶金]