|
|
Physical simulation on fluid flow consistence in tundish with asymmetric flow control device |
LI Xiao-song1, TANG Hai-yan1, HU Qun1, JIANG Xian-xun2, SUN Zhi-ming2, HE Tao2 |
1. School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, Beijing 100083, China; 2. Product Development Department, Jilin Jianlong Iron and Steel Co., Ltd., Jilin 132000, Jilin, China |
|
|
Abstract Limited by the position of the top slag discharge outlet, the flow control device of two-strand slab continuous casting tundish used in a steel plant is virtual asymmetrical. The industrial practice shows that the content of large-sized inclusions in the slab on the slag discharge side is higher, and the pass rate of flaw detection in the rolling product is lower, which are suspected to be related to the fluid flow consistency in tundish. Therefore, a 1∶3.5 water model is adopted to simulate the flow field in tundish, and the flow control effect is optimized based on the principle of fluid dynamics. The experimental results show that the difference of the stagnation time of No.1 nozzle and No.2 nozzle in the prototype case reaches 36 s, and the molten steel produces a short-circuit flow at the No.1 nozzle on the slag discharge side, resulting in the difference of cleanliness between the two-strand slabs. Through water model optimization, the standard deviations of the average residence time and the stagnation time of No.1 and No.2 nozzles drop to 0.12 and 0.35 s, respectively, under scheme F1, indicating that the flow behavior consistency of the two strands in tundish has been improved. In addition, the dead zone ratio is reduced by 8.87% and the average residence time is prolonged by 30 s.
|
Received: 08 March 2020
|
|
|
|
[1] |
王向红, 肖微, 张正林, 等. 异型中间包结构优化对帘线钢夹杂物的影响[J]. 中国冶金, 2019, 29(2):53.
|
[2] |
WANG Q, LIU Y, HUANG A, et al. CFD Investigation of effect of multi-hole ceramic filter on inclusion removal in a two-strand tundish[J]. Metallurgical and Materials Transactions:B, 2020, 51(1): 276.
|
[3] |
田恩华, 张健苹. 七流中间包结构优化的物理模拟[J]. 中国冶金, 2016, 26(7): 10.
|
[4] |
陈远清, 仇圣桃. T形中间包新型控流装置的模拟及试验[J]. 钢铁, 2018, 53(7): 45.
|
[5] |
张硕, 唐海燕, 刘锦文, 等.六流H型通道感应加热中间包的结构优化[J]. 钢铁研究学报, 2019, 31(9): 787.
|
[6] |
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, 44(6): 10.
|
[7] |
Harnsihacacha A, Piyapaneekoon A, Kowitwarangkul P. Physical water model and CFD studies of fluid flow in a single strand tundish[J]. Materials Today: Proceedings, 2018, 5(3):9220.
|
[8] |
TANG H, GUO L, WU G, et al. Hydrodynamic modeling and mathematical simulation on flow field and inclusion removal in a seven-strand continuous casting tundish with channel type induction heating[J]. Metals, 2018, 8(6):374.
|
[9] |
唐海燕, 于满, 李京社, 等. 连铸中间包内部结构优化的数理模拟及冶金效果[J]. 北京科技大学学报, 2009, 31(增刊1): 38.
|
[10] |
陈洋, 欧西达, 卫海瑞, 等.两流中间包控流装置优化的物理模拟与应用[J]. 连铸, 2019, 44(4): 75.
|
[11] |
赵丹婷, 刘爱强, 仇圣桃, 等. 带过滤器中间包流场的数学物理模拟和应用[J]. 钢铁, 2017, 52(1): 27.
|
[12] |
FANG Q, ZHANG H, LUO R, et al. Optimization of flow, heat transfer and inclusion removal behaviors in an odd multistrand bloom casting tundish[J]. Journal of Materials Research and Technology, 2020, 9(1):347.
|
[13] |
李少翔, 铁占鹏, 郑宝安, 等. 三流大方坯连铸中间包流场优化数值模拟研究[J]. 连铸, 2019, 44(5): 47.
|
[14] |
方瑞, 雷少武, 王建军. 七流中间包的结构优化与数值模拟[J]. 炼钢, 2018, 34(6): 15.
|
[15] |
李怡宏, 赵立华, 包燕平, 等. 板坯中间包内钢液流动特性[J]. 北京科技大学学报, 2014, 36(1): 21.
|
[16] |
王建军, 包燕平, 曲英. 中间包冶金学[M]. 北京:冶金工业出版社, 2001.
|
[17] |
Sahai Y, Emi T. Melt flow characterization in continuous casting tundishes[J]. ISIJ International, 1996, 36(6): 667.
|
|
|
|