Design of a submerged entry nozzle for optimizing continuous casting of stainless steel slab
作者机构：School of Metallurgy and Energy EngineeringKunming University of Science and TechnologyKunming650093YunnanChina CAS Key Laboratory of Green Process and EngineeringInstitute of Process EngineeringChinese Academy of SciencesBeijing100190China State Key Laboratory of Advanced MetallurgyUniversity of Science and Technology BeijingBeijing100083China
出 版 物：《Journal of Iron and Steel Research International》 (国际钢铁研究杂志)
年 卷 期：2023年第30卷第11期
页 面：2229-2241页
核心收录：
学科分类：08[工学] 080502[工学-材料学] 0805[工学-材料科学与工程（可授工学、理学学位）]
主 题：Stainless steel Continuous casting Submerged entry nozzle Water modeling Slag entrapment
摘 要：To solve slag entrapment and casting slab defects in the process of stainless steel continuous casting,submerged entry nozzle(SEN)for slab casters operating at casting speed of 1 m/min was developed based on 3D numerical simulation and water modeling experiments by controlling the outlet shape and angle of original SEN with oval and 15°angle outlet under current industrial *** simulations of fluid velocity at outlets with different shapes and angles of SENs have been carried *** results showed that oval outlet with 5°and 15°angle led to asymmetric rotating flow pattern at outlet,as well as square outlet with 15°angle,but symmetric flow pattern formed at square outlet with 5°*** effect of these SENs on meniscus stability,flow field and slag entrapment behavior of stainless steel slab casting mold was further studied by water modeling *** results showed that difficult floating fine droplets formed when the angle of outlet was 15°under the dual effect of vortex convection and shear force due to the strong swirling flow from outlet and rotating flow of ***,outlet with 5°angle could lead to the formation of larger slag droplets,while the oval outlet with 5°angle could result in the scour to the mold ***,the square outlet with 5°angle was a relatively ideal solution for the submerged entry nozzle from the aspects of the stability of the mold and the slag entrapment *** the design of a new SEN according to the experimental result,the solidification structure of continuous casting slab was obviously improved by industrial test.
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