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| A model for dead volume fraction in multi-strand asymmetric tundish based on F curve |
| CUI Heng1,2, OUYANG Yu-ke1, WANG Ru-dong1, SU Xiao-feng3,4, LIU Jian-hua3 |
1. Collaborative Innovation Center of Steel Technology, University of Science and Technology Beijing, Beijing 100083, China;
2. Beijing Laboratory,Metallic Materials and Processing for Modern Transportation, Beijing 100083, China;
3. Institute of Engineering Technology, University of Science and Technology Beijing, Beijing 100083, China;
4. Steelworks, Xinji Aosen Steel Group Co., Ltd., Shijiazhuang 052373, Hebei, China |
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Abstract In order to solve the problem of negative dead volume fraction or bigger calculation errors when the combined model is used to calculate the residence time distribution curves of different outlets of multi-strand asymmetric tundish, the E curve obtained from “pulse stimulus-response” tests was transformed into F curve, which could be used to establish an analysis model for dead volume fraction in a multi-strand asymmetric tundish based on F curve. Meanwhile, the flow uniformity of molten steel in the whole multi-strand asymmetric tundish was also evaluated by comparing the flow concentration difference and the local maximum, global maximum difference of F curves between the different strands. This model was used to analyze the flow characteristics of four-strand asymmetric tundishes. The results show there is a slow flow area above the No.3 and No.4 nozzles in tundish without the flow control device, and the molten steel renewal in tundish is slow, and the flow field is unreasonable. With the addition of the retaining wall, the consistency of flow in tundish is enhanced, and the flow consistency of No.2 and No.3 nozzles is similar, and that of No.1 and No.4 nozzles is similar. Using the combination of retaining wall and dam 2, the consistency of each flow is the best and the proportion of dead volume fraction is the smallest.
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Received: 28 November 2020
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| [1] |
包燕平, 王敏.中间包冶金学[M].北京:冶金工业出版社,2019.
|
| [2] |
Sahai Y, Emi T. Melt flow characterization in continuous casting tundishes[J]. ISIJ International,1996,36(6):667.
|
| [3] |
Kumar A, Koria S C, Mazumdar D. An assessment of fluid flow modelling and residence time distribution phenomena in steelmaking tundish systems[J]. ISIJ International,2004,44(8):1334.
|
| [4] |
王建军,彭世恒,肖泽强.多流中间包流动特征分析的全流量模型[J].炼钢,1998,14(5):27.
|
| [5] |
郑淑国,朱苗勇.多流连铸中间包内钢液流动特性的分析模型[J].金属学报,2005,41(10):67.
|
| [6] |
祝明妹,文光华,唐萍,等.多流中间包内流体流动模式的分析方法[J].过程工程学报,2008,8(增刊1):41.
|
| [7] |
雷洪,赵岩,鲍家琳,等.多流连铸中间包停留时间分布曲线总体分析方法[J].金属学报,2010,46(9):1109.
|
| [8] |
窦炳胜,孙彦辉,蔡亦凡,等.三流非对称中间包流场优化[J].炼钢,2018,34(8):24.
|
| [9] |
SU X F,JI Y L,LIU J H,et al. Analysis on residence time distribution curve of continuous casting tundish by combined model[J]. Steel Research International,2018,89(12):1.
|
| [10] |
郑淑国,朱苗勇.多流连铸中间包各流流动特性一致性的判别[J]. 过程工程学报, 2006, 6(4): 522.
|
| [11] |
雷洪,毕乾,罗智恒,等.非对称两流中间包内流体流动的对称化[J]. 东北大学学报(自然科学版),2013,34(11): 1589.
|
| [12] |
谢文新,包燕平,王敏,等.改善多流中间包均匀性研究[J]. 北京科技大学学报, 2014, 36(增刊1): 213.
|
| [13] |
李四军,李萍,彭永香,等.非对称三流中间包结构优化的水模型研究[J]. 连铸, 2019(6): 10.
|
| [14] |
李小松,唐海燕,胡群,等.非对称控流结构中间包流场一致性的物理模拟[J]. 中国冶金,2020, 30(10): 28.
|
| [15] |
储成阳,徐宁,武鸿杰,等.五流中间包稳态及非稳态试验[J]. 连铸, 2020(10): 7.
|
| [16] |
马钰,唐海燕,张硕,等.通道式感应加热五流中间包流场的水力学模拟[J]. 钢铁,2020, 55(11): 57.
|
| [17] |
CUI H, LIU Y, LI D X. Fluid flow characterization in asymmetric tundish[J]. ISIJ International,2015,55(12):2604.
|
| [18] |
李东侠,崔衡.多流中间包钢液流动特性分析方法[J]. 工程科学学报, 2016, 38(1): 41.
|
| [19] |
LI D X,CUI H,LIU Y,et al. A new method based on the F-curve for characterizing fluid flow in continuous casting tundishes[J]. Metallurgical and Materials Transactions B,2016,47(2):1237.
|
| [20] |
Levenspiel O. Chemical Reaction Engineering[M].New York:John Wiley and Sons,2011:264.
|
| [21] |
肖兴国,谢蕴国.冶金反应工程学基础[M].北京:冶金工业出版社,1997:119.
|
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2021, Vol. 40 
