Effects of argon blowing at tundish upper nozzle on multiphase flow behavior in nozzle
作者机构：The State Key Laboratory of Refractories and MetallurgyWuhan University of Science and TechnologyWuhan 430081HubeiChina Hubei Provincial Key Laboratory for New Processes of Ironmaking and SteelmakingWuhan University of Science and TechnologyWuhan 430081HubeiChina
出 版 物：《Journal of Iron and Steel Research International》 (J. Iron Steel Res. Int.)
年 卷 期：2022年第29卷第4期
页 面：588-600页
核心收录：
学科分类：080602[工学-钢铁冶金] 08[工学] 0806[工学-冶金工程]
基 金：the National Natural Science Foundation of China(Nos.51874215 and 51974213)
主 题：Argon blowing Tundish upper nozzle Nozzle clogging Numerical simulation
摘 要：In continuous casting,the argon blowing at the tundish upper nozzle is usually used to prevent nozzle clogging,whose effect is closely related to the migration of argon bubbles and the flow behavior of the liquid steel in the ***,to investigate the effects of argon blowing at the tundish upper nozzle on multiphase flow behavior in nozzle,a threedimensional model of the tundish–nozzle–mold was established for numerical *** results indicate that the argon bubbles injected from the inner wall of the tundish upper nozzle first move downward along the nozzle wall under the action of the liquid *** the distance from the tundish upper nozzle increases,the argon bubbles gradually diffuse to the center of the *** with no argon blowing,the liquid steel velocity increases in the center of the nozzle and decreases near the wall with argon *** increasing the argon flow rate,the concentration of bubbles in the nozzle increases,and the process of bubble group diffusion to the center region of the nozzle speeds *** in turn increases the liquid steel velocity at the center of the nozzle but reduces near the *** increasing the casting speed,the concentration of bubbles in the nozzle decreases,the length of the bubble group near the nozzle wall is extended,and the liquid steel velocity at the center region and near-wall region of the nozzle *** mechanism of argon blowing at the tundish upper nozzle to prevent nozzle clogging is mainly realized by the isolation effect of the argon bubble group on the inner wall of the nozzle.
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