Effects of operating parameters on the flow field in slab continuous casting molds with narrow widths
来源期刊：International Journal of Minerals Metallurgy and Materials2021年第2期
论文作者：Tao Zhang Jian Yang Gang-jun Xu Hong-jun Liu Jun-jun Zhou Wei Qin
文章页码：238 - 248
摘 要：Computational simulations and high-temperature measurements of velocities near the surface of a mold were carried out by using the rod deflection method to study the effects of various operating parameters on the flow field in slab continuous casting（CC） molds with narrow widths for the production of automobile exposed panels. Reasonable agreement between the calculated results and measured subsurface velocities of liquid steel was obtained under different operating parameters of the CC process. The simulation results reveal that the flow field in the horizontal plane located 50 mm from the meniscus can be used as the characteristic flow field to optimize the flow field of molten steel in the mold. Increases in casting speed can increase the subsurface velocity of molten steel and shift the position of the vortex core downward in the downward circulation zone. The flow field of liquid steel in a 1040 mm-wide slab CC mold can be improved by an Ar gas flow rate of 7 L·min-1 and casting speed of 1.7 m·min-1. Under the present experimental conditions, the double-roll flow pattern is generally stable at a submerged entry nozzle immersion depth of 170 mm.
Tao Zhang1，Jian Yang1，Gang-jun Xu2，Hong-jun Liu2，Jun-jun Zhou2，Wei Qin2
1. State Key Laboratory of Advanced Special Steel, Shanghai University2. Hunan Valin Lianyuan Iron & Steel Co., Ltd.
摘 要：Computational simulations and high-temperature measurements of velocities near the surface of a mold were carried out by using the rod deflection method to study the effects of various operating parameters on the flow field in slab continuous casting（CC） molds with narrow widths for the production of automobile exposed panels. Reasonable agreement between the calculated results and measured subsurface velocities of liquid steel was obtained under different operating parameters of the CC process. The simulation results reveal that the flow field in the horizontal plane located 50 mm from the meniscus can be used as the characteristic flow field to optimize the flow field of molten steel in the mold. Increases in casting speed can increase the subsurface velocity of molten steel and shift the position of the vortex core downward in the downward circulation zone. The flow field of liquid steel in a 1040 mm-wide slab CC mold can be improved by an Ar gas flow rate of 7 L·min-1 and casting speed of 1.7 m·min-1. Under the present experimental conditions, the double-roll flow pattern is generally stable at a submerged entry nozzle immersion depth of 170 mm.
关键词：
