Study on Argon Bubble Behavior at Interface of Steel and Slag in Continuous Slab Casting Mold with Argon Blowing 在线阅读 下载PDF
Author of the article:CHENG Changgui;ZHANG Jinlei;CHEN Ying;LI Yang;JIN Yan
Author's Workplace：Key Laboratory for Ferrous Metallurgy and Resources Utilization of Ministry of Education, Wuhan University of Science and Technology, Wuhan 430081, China
Key Words：continuous casting mold argon blowing interface of steel and slag bubble behavior
Abstract：
The argon bubble behavior at the interface of steel and slag in continuous slab casting mold with argon blowing had an important effect on the emulsification of the liquid mold powder, which was related to the bubble number, size and floating velocity. As a result, a physical model of the mold with the similarity ratio of 1∶0.6 had been established, and the effects of operation parameters on the argon bubble behavior at the liquid interface of steel and slag had been studied. The results show that the increase trend of the floating bubble size from the nozzle to the mold narrow surface becomes obvious when the flow rate of argon increases, the bubble number and floating speed near nozzle increase, while the bubble number and floating speed decrease near the mold narrow surface. With the increase of the casting speed, the bubble size decreases,the bubble number increases, and the floating speed of bubble near the nozzle trends to decrease, while it increases gradually near the mold narrow surface. As the immersion depth of submerged entry nozzle raises, the average size of argon bubbles decreases, the floating speed of bubbles near nozzle increases slightly, while the floating speed near the mold narrow surface increases first and then decreases. With the increase of the inclination angle of the submerged entry nozzle port, the peak value of bubble size at the steel/slag interface decreases gradually, the floating speed of bubble near the nozzle has no significant change, but the floating speed of bubble near the mold narrow surface increases first and then decreases.
