Interfacial Fluctuation Behavior of Steel/Slag in Medium-Thin Slab Continuous Casting Mold With Argon Gas Injection

作     者：YU Hai-qi ZHU Miao-yong WANG Jun 

作者机构：School of Materials and Metallurgy Northeastern University Shenyang 110004 Liaoning China Anshan Iron and Steel Co Anshan 114009 Liaoning China 

出 版 物：《Journal of Iron and Steel Research International》 (J. Iron Steel Res. Int.)

年 卷 期：2010年第17卷第4期

页      面：5-11页

核心收录：

学科分类：080602[工学-钢铁冶金] 081504[工学-水利水电工程] 08[工学] 0806[工学-冶金工程] 0815[工学-水利工程] 

基　　金：Item Sponsored by National Natural Science Foundation of China and Baosteel Co(50674020) 

主　　题：medium-thin slab mold argon gas injection steel/slag interface numerical simulation 

摘      要：The flow field of molten steel and the interfacial behaviour between molten steel and liquid slag layer in medium-thin slab continuous casting mold with argon gas injection were studied by numerical simulation, in which the effects of nozzle submergence depth and port angle, casting speed, and argon gas flow rate on the flow and the level fluctuation of molten steel were considered. The results show that the molten steel is jetted from the submerged en- try nozzle （SEN） with three ports into the mold and forms three recirculation zones including one upper recireulation zone and two lower recirculation zones. Argon gas injection results in a secondary vortex flow in the upper zone near the nozzle. For a given casting speed and argon gas flow rate, increasing the side port angle and submergence depth of nozzle can effectively restrain the steel/slag interracial fluctuation. Increasing the casting speed would prick up the level fluctuation. For a fixed casting speed, argon gas flow rate has a critical value, the interracial fluctuation with argon gas injection are stronger than the case without argon gas injection when the argon gas flow rate is less than the critical value, but when the argon gas flow rate exceeds the critical value, the level fluctuation is calmer than that without argon gas injection.