Study on fluctuation behavior of mold steel slag surface under blowing conditions
LIU Tong-wei1,2, ZHANG Yan-chao1,2, ZHANG Cai-jun1,2, ZHAI Jin-jun3,4
1. College of Metallurgy and Energy, North China University of Science and Technology, Tangshan 063210, Hebei,China; 2. Hebei Engineering Research Center of Heigh Quality Steel Continuous Casting, Tangshan 063210, Hebei,China; 3. School of Materials Science and Engineering, Beijing University of Science and Technology, Beijing 100083,China; 4. Welding Steel Technology Innovation Center, Hebei Province Technology Center Tangshan Delong Steel Co., Ltd., Tangshan 063210, Hebei,China
Abstract：In order to reveal the behavior of the steel-slag interface of the mold under different process conditions, a mold with a section of 1 000 mm×230 mm is numerically simulated by Fluent fluid mechanics software. The effects of different casting speeds (0.9-1.5 m/min), nozzle angle (12°-15°) and argon blowing rate (0-6 L/min) on the speed and wave height of the mold steel-slag interface were analyzed. The simulation results show that when the argon blowing rate 4 L/min, the increase of the casting speed will reduce the disturbance of the steel-slag interface floating on the argon bubble near the submerged entry nozzle, but the wave height near the narrow surface of the mold will increase with the increase of the casting speed. The fluctuation of the interface is aggravated, the fluctuation near the narrow surface is smoothed by the increase of the consumption of the turbulent energy of the steel liquid from the floating argon bubble, the nozzle angle has a greater influence on the steel-slag interface, the nozzle angle is smaller, the floating distance of the argon bubble is shorter, and the wave height and speed are relatively large around the nozzle and near the narrow surface.
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2022, Vol. 41 
