Optimization of the tundish flow field based on <i>F</i>-curve

WANG Ru-dong; SU Wang; CUI Heng; YAN Jin-bao; LIU Jian-hua; WANG Fu-liang

doi:10.13374/j.issn2095-9389.2020.03.20.s14

Volume 42 Issue S

Dec. 2020

Turn off MathJax

Article Contents

Article Navigation > Chinese Journal of Engineering > 2020 > 42(S): 95-101

WANG Ru-dong, SU Wang, CUI Heng, YAN Jin-bao, LIU Jian-hua, WANG Fu-liang. Optimization of the tundish flow field based on F-curve[J]. Chinese Journal of Engineering, 2020, 42(S): 95-101. doi: 10.13374/j.issn2095-9389.2020.03.20.s14

Citation:

WANG Ru-dong, SU Wang, CUI Heng, YAN Jin-bao, LIU Jian-hua, WANG Fu-liang. Optimization of the tundish flow field based on F-curve[J]. Chinese Journal of Engineering, 2020, 42(S): 95-101. doi: 10.13374/j.issn2095-9389.2020.03.20.s14

Citation:

PDF( 1631 KB)

Optimization of the tundish flow field based on F-curve

doi: 10.13374/j.issn2095-9389.2020.03.20.s14

1.
Collaborative Innovation Center of Steel Technology, University of Science and Technology Beijing, Beijing 100083, China
2.
Rizhao Steel Holding Group Co., Ltd., Rizhao 276806, China
3.
Beijing Laboratory of Metallic Materials and Processing for Modern Transportation, Beijing 100083, China
4.
Institute of Engineering Technology, University of Science and technology Beijing, Beijing 100083, China

More Information

Corresponding author: E-mail: cuiheng@ustb.edu.cn
Received Date: 2020-03-20
Publish Date: 2020-12-25

Abstract

Abstract

The water model with a similarity ratio of 1∶2 was established for a three-strand beam blank tundish. The molten steel flowing character was researched in different flow control devices by using the F-curve, and the flow field of the tundish was optimized. The volume fractions of dead region, plug flow and well-mixed flow are calculated. The standard deviation of the stagnation time of 1, 2 and 3 flow and the maximum value of standard deviation function of F-curve were used to evaluate the dispersion of each flow. Three cases were considered during the experiments, i.e, prototype flow control device, turbulence inhibitor without dams combination, turbulence inhibitor and dams combination. The results show that short circuit flow exists in the middle nozzle of the prototype tundish, and poor consistency between nozzles, which may lead to the uneven temperature and cleanness of the three-strand beam blanks, leading to different quality of different beam blanks in one heat. Using the turbulence inhibitor without dams combination, the short circuit flow appears in the middle of tundish with the angle of diversion holes being 60°. When the angle is 86°, there is no short circuit flow, and the consistency between strands becomes better. When the angle is 110°, the short circuit flow appears in the two sides of the tundish nozzle with the best consistency between strands. There is no correlation between the consistency of the tundish strands and the dead volume fraction. When the consistency of the tundish strands is good, the dead volume fraction may not be small. After optimization, the angle of the diversion hole of the tundish turbulence inhibitor is 110°, the dam is 2400 mm away from the tundish center. There is no short-circuit flow, the consistency of 1# and 2# nozzles is the best, the dead volume fraction is reduced to 9.67% from 17.89%, and the reduction rate is 11.25%. The maximum standard deviation of the F-curve is reduced to 0.016 from 0.3.
- multi-strand tundish,
- beam blank,
- physical simulation,
- F-curve,
- flow control device

FullText(HTML)

References(21)

References

[1]	Zhong L C, Wang M A, Chen B Y, et al. Flow control in six-strand billet continuous casting tundish with different configurations. J Iron Steel Res Int, 2010, 17(7): 7 doi: 10.1016/S1006-706X(10)60148-3
[2]	Cwudziński A. Numerical, physical, and industrial experiments of liquid steel mixture in one strand slab tundish with flow control devices. Steel Res Int, 2014, 85(4): 623 doi: 10.1002/srin.201300079
[3]	Yang S F, Li J S, Jiang J, et al. Fluid flow in large-capacity horizontal continuous casting tundishes. Int J Miner Metall Mater, 2010, 17(3): 262 doi: 10.1007/s12613-010-0303-y
[4]	López-Ramirez S, Palafox-Ramos J, Morales R D, et al. Modeling study of the influence of turbulence inhibitors on the molten steel flow, tracer dispersion, and inclusion trajectories in tundishes. Metall Mater Trans B, 2001, 32(4): 615 doi: 10.1007/s11663-001-0117-4
[5]	包燕平, 王敏. 中間包冶金學. 北京: 冶金工業出版社, 2019 Bao Y P, Wang M. Tundish Metallurgy. Beijing: Metallurgical Industry Press, 2019
[6]	蔡開科. 連鑄坯質量控制. 北京: 冶金工程出版社, 2010 Cai K K. Quality Control of Continuously Cast Slab. Beijing: Metallurgical Industry Press, 2010
[7]	李怡宏, 趙立華, 包燕平, 等. 板坯中間包內鋼液流動特性. 北京科技大學學報, 2014, 36(1):21 Li Y H, Zhao L H, Bao Y P, et al. Flow Characteristic of molten steel in slab casting tundishes. J Univ Sci Technol Beijing, 2014, 36(1): 21
[8]	Wen G H, Tang P, Huang Y F. Improvement of tundish shape and optimization of flow control devices for sequence casting heavy steel ingots. Int J Miner Metall Mater, 2012, 19(1): 15 doi: 10.1007/s12613-012-0509-2
[9]	Kumar A, Mazumdar D, Koria S C. Modeling of fluid flow and residence time distribution in a four-strand tundish for enhancing inclusion removal. ISIJ Int, 2008, 48(1): 38 doi: 10.2355/isijinternational.48.38
[10]	Sahai Y, Emi T. Melt flow characterization in continuous casting tundishes. ISIJ Int, 1996, 36(6): 667 doi: 10.2355/isijinternational.36.667
[11]	鄭淑國, 朱苗勇. 多流連鑄中間包內鋼液流動特性的分析模型. 金屬學報, 2005, 41(10):67 Zheng S G, Zhu M Y. Analysis model for flow characteristics in multi-strand continuous casting tundish. Acta Metall Sin, 2005, 41(10): 67
[12]	鄭淑國, 朱苗勇. 多流連鑄中間包各流流動特性一致性的判別. 過程工程學報, 2006, 6(4):522 doi: 10.3321/j.issn:1009-606X.2006.04.002 Zheng S G, Zhu M Y. Criteria on the similarity of melt flow among strands in multi-strand continuous casting tundish. Chin J Process Eng, 2006, 6(4): 522 doi: 10.3321/j.issn:1009-606X.2006.04.002
[13]	雷洪, 趙巖, 鮑家琳, 等. 多流連鑄中間包停留時間分布曲線總體分析方法. 金屬學報, 2010, 46(9):1109 doi: 10.3724/SP.J.1037.2010.00220 Lei H, Zhao Y, Bao J L, et al. Whole analysis approach for residue time distribution curve in multi-strand continuous casting tundish. Acta Metall Sin, 2010, 46(9): 1109 doi: 10.3724/SP.J.1037.2010.00220
[14]	雷洪, 趙巖, 邢國成, 等. 總體分析法在非對稱兩流中間包水模型中的應用. 東北大學學報(自然科學版), 2011, 32(4):537 Lei H, Zhao Y, Xing G C, et al. Use of a comprehensive analytical approach for water modeling of an asymmetrical two-strand tundish. J Northeast Univ (Nat Sci), 2011, 32(4): 537
[15]	潘宏偉, 程樹森. 多流中間包流動特征的數學模型. 北京科技大學學報, 2009, 31(7):815 doi: 10.3321/j.issn:1001-053X.2009.07.002 Pan H W, Cheng S S. Mathematical model of flow characterization in multi-strand continuous casting tundishes. J Univ Sci Technol Beijing, 2009, 31(7): 815 doi: 10.3321/j.issn:1001-053X.2009.07.002
[16]	祝明妹, 文光華, 唐萍, 等. 多流中間包內流體流動模式的分析方法. 過程工程學報, 2008, 8(S1):41 Zhu M M, Wen G H, Tang P, et al. Analytical method for flow pattern in multi-strand tundish. Chin J Process Eng, 2008, 8(S1): 41
[17]	Cui H, Liu Y, Li D X. Fluid flow characterization in asymmetric tundish. ISIJ Int, 2015, 55(12): 2604 doi: 10.2355/isijinternational.ISIJINT-2015-409
[18]	Li D, Cui H, Liu Y, et al. A new method based on the f-curve for characterizing fluid flow in continuous casting tundishes. Metall Mater Trans B, 2016, 47(2): 1237 doi: 10.1007/s11663-015-0571-z
[19]	李東俠, 崔衡. 多流中間包鋼液流動特性分析方法. 工程科學學報, 2016, 38(1):41 Li D X, Cui H. A method for characterizing the flow fluid in a multi-strand tundish. Chin J Eng, 2016, 38(1): 41
[20]	田永華, 包燕平, 李怡宏, 等. 80 t兩流板坯連鑄中間包擋墻結構優化研究. 鋼鐵釩鈦, 2013, 34(2):67 doi: 10.7513/j.issn.1004-7638.2013.02.013 Tian Y H, Bao Y P, Li Y H, et al. Study on optimization of the baffle for two-strand slab caster’s 80 t tundish. Iron Steel Vanadium Titanium, 2013, 34(2): 67 doi: 10.7513/j.issn.1004-7638.2013.02.013
[21]	肖興國, 謝蘊國. 冶金反應工程學基礎. 北京: 冶金工業出版社, 1997 Xiao X G, Xie Y G. Metallurgical Reaction Engineering Foundation. Beijing: Metallurgical Industry Press, 1997