Submerged entry nozzle and its effect on mold flow behavior of slab casting
LEI Linlin1, CHANG Yunhe2, LUO Yanzhao3, JI Chenxi3, ZHU Jingliang4, XIAO Hong4, ZHANG Jiaquan1
1. School of Metallurgical and Ecological Engineering,University of Science and Technology Beijing, Beijing 100083,China; 2. Plate Steel Business Unit, Nanjing Iron and Steel Co., Ltd., Nanjing 210044, Jiangsu, China; 3. Technical Institute,Shougang Steel Group, Beijing 100041,China; 4. Magnetoelectric Research Institute, Hunan Zhongke Electric Co., Ltd., Yueyang 414000,Hunan,China
Abstract：Slab casting is the primary forming process for various steel plate and sheet production, in which the semi-product slab quality is closely related to the mold metallurgical function supported by submerged entry nozzles(SEN). In the light of the current situation of slab continuous casting and the need for further development, the understanding to the geometry design, practice parameters and material category of SENs has been summarized in the paper based on reference review. It is shown that the adoption of SENs plays an important role in mold metallurgical behavior and the resultant slab quality, but there is no clear quantitative criterion to date for the design and application of SENs during casting production. In view of the frequent variation in castability of steel grades, slab formats and the related casting speed during actual production, the service organization for casting machines and the fluid flow control for SEN outlets by an electromagnetic facility have been discussed, which is supposed to realize an identical ideal mold flow pattern with a given SEN for any changing casting situation.
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