1. College of Metallurgy and Energy, North China University of Science and Technology, Tangshan 063210, Hebei, China;
2. Hebei High Quality Steel Continuous Casting Technology Innovation Center, Tangshan 063000, Hebei, China;
3. Tangshan Branch, HBIS Co., Ltd., Tangshan 063000, Hebei, China
Abstract：In order to deal with the instability behavior of molten steel in the thin slab mold with increasing casting speed, taking the 1 520 mm×90 mm thin slab mold as the research object, the liquid level tracking technology VOF method was used to model and calculate the steel slag interface in the thin slab continuous casting mold. The fluid flow and the behavior of steel/slag interface in thin slab continuous casting mould were simulated. Combined with the actual production process, the effects of casting speed, immersion depth and mold flux viscosity on mold flow field and slag interface were analyzed by 1∶1 physical model and numerical simulation. The results show that when the liquid steel flow rate is 0.20-0.25 m/s and the interface is stable, the mold flux viscosity higher than 0.237 Pa·s can be applied. When the liquid steel flow rate is 0.25-0.30 m/s and the viscosity of mold flux is 0.382 Pa·s, the slag entrapment rate of low carbon steel is less than 0.5%, showing good slag entrapment ability.
Thomas B G, Mika L J, Najjar F M. Simulation of fluid flow inside a continuous slab-casting machine[J]. Metallurgical and Materials Transactions:B, 1990, 21(2):387.
[2]
Zhang L, Aoki J, Thomas B G. Inclusion removal by bubble flotation in a continuous casting mold[J]. Metallurgical and Materials Transactions:B, 2006, 37(3):361
Akira Matsushita, Katsuyuki Isogami, Masami Temma,et al. Direct observation of molten steel meniscus in CC mold during casting[J]. Transactions of the Iron and Steel Institute of Japan, 2006, 28(7):531.
2021, Vol. 40 
