1. School of Iron and Steel, Soochow University, Suzhou 215137, Jiangsu,China; 2. Ningbo Branch, China Academy of Ordnance Science, Ningbo 315103, Zhejiang, China; 3. Laigang Technique Center, Shandong Iron and Steel Group Company Limited, Jinan 271104, Shandong, China
Abstract：High-speed casting is charaterized by high efficiency and lower cost, indicating the future of continuous casting process. Taking the conventional slab for example, the large eddy simulation (LES) method is adopted to study the slag entrapment in a casting mold. Results reveal that the flow field during low casting speed remains steady. This leads to the fact that the upward flow velocity and the fluctuations of slag-metal interface are quite low. By comparison, under the effect of high casting speed, the impingement velocity of steel increases, and more slag drops are involved into the mold. Through analyzing the maximum velocity of the slag-metal interface, a new criterion for the critical velocity of slag entrapment is established. It is found that the critical velocity of slag entrapment is different under different casting speed. The reason for this phenomenon is because of the differences of slag entrapment mechanisms. This model has a certain guiding significance to control the production of high-speed continuous casting.
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2022, Vol. 41 
