Numerical Simulation of Flow in Mold for Continuous Casting Slab

Author of the article:HAO Jiujiu1,2

Author's Workplace：1. Department of Metallurgy and Environmental Engineering, Shanxi Engineering Vocational College, Taiyuan 030009, Shanxi, China. 2.School of Metallurgical and Ecological Engineering, University of Science and Technology, Beijing 100083, China

Key Words：continuous casting slab; numerous simulation; mold flow; surface velocity; immersion depth

Abstract：The surface flow rate of slab mould has an important effect on the melting of protective slag and the uniformity of slab shell. The flow of molten steel in slab mould was studied by transient numerical simulation method, and the influence of different parameters on the flow field of mould was evaluated by comparing the average flow velocity of mould surface. The results show that the average surface velocity increases from 0.192 m/s to 0.210 m/s when the nozzle angle increases from 20° to 10°. The increase of surface velocity is conducive to the melting of protective slag and the stability of flow field. The optimal nozzle angle is 10°. When the nozzle immersion depth increases from 100 mm to 140 mm, the surface flow rate will decreases from 0.215 m/s to 0.189 m/s. Therefore, the nozzle should be avoided to stay for a long time under the deeper immersion depth. Oval nozzle is better than square nozzle.