|
|
|
| Mathematical Modeling of Multi-sized Argon Gas Bubbles Motion and Its Impact on Melt Flow in Continuous Casting Mold of Steel |
| Chong-lin LIU1,Zhi-guo LUO1,Tao ZHANG1,Shen DENG2,Nan WANG1,Zong-shu ZOU1 |
1. School of Materials and Metallurgy, Northeastern University, Shenyang 110819, Liaoning, China
2. Technology Center, Guangxi Liuzhou Iron and Steel Company, Liuzhou 545002, Guangxi, China |
|
|
|
|
Abstract The 3D turbulence k-�� model flow of the steel melt (continuous phase) and the trajectories of individual gas bubbles (dispersed phase) in a continuous casting mold were simulated using an Eulerian-Lagrangian approach. In order to investigate the effect of bubble size distribution, the radii of bubbles are set with an initial value of 0. 1-2. 5 mm which follows the normal distribution. The presented results indicate that, in the submerged entry nozzle (SEN), the distribution of void fraction is only near the wall. Due to the fact that the bubbles motion is only limited to the wall, the deoxidization products have no access to contacting the wall, which prevents clogging. In the mold, the bubbles with a radius of 0. 25-2. 5 mm will move to the top surface. Larger bubbles issuing out of the ports will attack the meniscus and induce the fluid flows upwards in the top surface near the nozzle. It may induce mold powder entrapment into the mold. The bubbles with a radius of 0. 1-0. 25 mm will move to the zone near the narrow surface and the wide surface. These small bubbles will probably be trapped by the solidification front. Most of the bubbles moving to the narrow surface will flow with the ascending flow, while others will flow with the descending flow.
|
|
Received: 06 November 2012
Published: 15 April 2014
|
| Fund:Projects Sponsored by the National Natural Science Foundation of China |
|
|
|
| [1] |
Zhong Zheng,*,Jian-yu Long,Xiao-qiang Gao. Production scheduling problems of steelmaking-continuous casting process in dynamic production environment[J]. Chinese Journal of Iron and Steel, 2017, 24(6): 586-594. |
| [2] |
Long Guo,Xing-zhong Zhang*,Chang-xi Feng. Continuous bending and straightening technology of Q345c slab based on high-temperature creep deformation[J]. Chinese Journal of Iron and Steel, 2017, 24(6): 595-600. |
| [3] |
Bang-fu Huang,,*,Nai-yuan Tian,Zhe Shi,,Zhi-wei Ma,. Steel ladle exchange models during steelmaking and continuous casting process[J]. Chinese Journal of Iron and Steel, 2017, 24(6): 617-624. |
| [4] |
Yu Xu,,En-gang Wang,,*,Zhuang Li,,An-yuan Deng,. Effects of vertical electromagnetic stirring on grain refinement and macrosegregation control of bearing steel billet in continuous casting[J]. Chinese Journal of Iron and Steel, 2017, 24(5): 483-489. |
| [5] |
Chao Zhou,,Xing-zhong Zhang,*,Fang Wang,Ping-fei Liu,Yi-ming Fang. Mechanism analysis of non-sinusoidal oscillation of continuous casting mold synchronously driven by double servomotors[J]. Chinese Journal of Iron and Steel, 2017, 24(3): 251-257. |
| [6] |
Yang Liu,Xin-hua Liu*,Hua-dong Fu,Min-xuan Lou,Jian-xin Xie. Effects of process parameters on surface quality, composition segregation, microstructure and properties of QSn6.5-0.1 alloy slabs fabricated by HCCM horizontal continuous casting[J]. Chinese Journal of Iron and Steel, 2017, 24(3): 273-281. |
|
|
|
|
2014, Vol. 21 
