Flow behavior of molten steel during fewer strands casting of six-strand bloom
WANG Xian-yang1,2, HU Hao1,2, XIE Xin2, WU Chen-hui2, LONG Mu-jun1, CHEN Deng-fu1
1. College of Materials Science and Engineering, Chongqing University, Chongqing 400044, China; 2. State Key Laboratory of Vanadium and Titanium Resources Comprehensive Utilization, Panzhihua 617000,Sichuan,China
Abstract:In continuous casting, it is common to close single or multiple nozzle of multi-strands tundish in order to adapt to production rhythm due to insufficient molten steel or equipment failure. However, the closure of the nozzle will change the flow field in the tundish and further affect the removal efficiency of inclusions in the tundish. For this reason, based on numerical simulation, the flow behavior of molten steel and the removal of inclusion in tundish with different nozzle closed were studied, and the optimal nozzle closing scheme was obtained, which provided a basis for the selection of nozzle closing in tundish. The results show that the volume of dead zone in tundish increases slightly when the first casting is turned off, and the effect of turning off the first casting on the removal of inclusion in tundish is minimal. The removal rates of 10, 30, 50, 70 and 90 μm inclusions changed from 12.4%, 39.1%, 74.2%, 93.3% and 95.6% to 14.7%, 36.4%, 76.4%, 85.3% and 93.8%, respectively.
ZHONG L, HAO R, LI J, et al. Molten steel flow in a slab continuous-casting tundish[J]. Journal of Iron and Steel Research International, 2014, 21: 10.
[2]
YUE Q, ZOU Z, HOU Q, et al. Water modeling of swirling flow tundish for steel continuous casting[J]. Journal of Iron and Steel Research International, 2009, 16(5): 17.
[3]
XU P, ZHOU Y, CHEN D, et al. Optimization of submerged entry nozzle parameters for ultra-high casting speed continuous casting mold of billet[J]. Journal of Iron and Steel Research International, 2022: 1.
[4]
YU S, LONG M, CHEN D, et al. Effect of the mold corner structure on the friction behavior in slab continuous casting molds[J]. Journal of Materials Processing Technology, 2019, 270: 157.
YU S, LONG M, ZHANG M, et al. Effect of mold corner structures on the fluid flow, heat transfer and inclusion motion in slab continuous casting molds[J]. Journal of Manufacturing Processes, 2021, 68: 1784.
[13]
Sinha A K, Sahai Y. Mathematical modeling of inclusion transport and removal in continuous casting tundishes[J]. ISIJ International, 1993, 33(5):556.
XIE W X,BAO Y P,WANG M,et al. Study on improvement in uniformity of a multi-strand tundish[J]. Journal of University of Science and Technology Beijing, 2014, 36:213.
[17]
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.
[18]
ZHONG L C,WANG M A,CHEN B Y, et al.Flow control in six-strand billet continuous casting tundish with different configurations[J]. Journal of Iron and Steel Research International,2010,17(7):7.