Influence of submerged entry nozzle on funnel mold surface velocity
Author:
Zhang Limin12, Zhu Liguang13, Zhang Caijun12, Xiao Pengcheng12, Wang Xingjuan12
Affiliation:
1. Hebei Provincial High-Quality Steel Continuous Casting Engineering Technology Research Center , Tangshan, Hebei 063000 , China 2. College of Metallurgy and Energy, North China University of Science and Technology , Tangshan, Hebei 063009 , China 3. School of Science and Engineering, Hebei University of Science and Technology , Shijiazhuang, Hebei 050018 , China
Abstract
Abstract
In this article, physical and numerical simulation of the flow field in flexible thin slab caster funnel mold at high casting speed is carried out with a five-hole submerged entry nozzle (FHSEN), and characteristics of the flow field on funnel mold liquid level under different casting speeds (4, 5, and 6 m·min−1) and different submerged depths (130, 160, and 190 mm) are studied by comparing with the new submerged entry nozzle (NSEN) designed. Physical simulation is based on the funnel mold prototype. Numerical simulation is carried out based on FLUENT software, and industrial experiments of two kinds of submerged entry nozzle are also carried out. The results show that in the case of both physical and numerical simulation, the maximum surface velocity of the FHSEN funnel mold is 0.58 m·s−1, and the funnel mold liquid level is prone to slag entrapment. The NSEN funnel mold’ maximum surface velocity is 0.37 m·s−1. Compared with the FHSEN, the NSEN funnel mold’ maximum surface velocity decreases by 0.21 m·s−1, and funnel mold surface velocity decreases significantly. Finally, the accuracy of simulation results is verified by industrial tests, and it is also show that NSEN can greatly reduce funnel mold surface velocity and probability of slag entrapment.
Publisher
Walter de Gruyter GmbH
Subject
Physical and Theoretical Chemistry,Mechanics of Materials,Condensed Matter Physics,General Materials Science
Reference27 articles.
1. Xing, W. and D. Y. Yuan. Development status and new technology of high-efficiency continuous casting. Continuous Casting, Vol. 1, 2011, pp. 1–4. 2. Zhu, L. G., L. M. Zhang, and P. C. Xiao. Analysis and control of slag inclusion defects of low carbon steel slab. Continuous Casting, Vol. 45, 2020, pp. 36–40. 3. Cho, S. M., S. H. Kim, and B. G. Thomas. Transient fluid flow during steady continuous casting of steel slabs: Part I. Measurements and modeling of two-phase flow. ISIJ International, Vol. 54, 2014, pp. 845–854. 4. Liu, H., J. Zhang, H. Tao, and H. Zhang. Numerical analysis of local heat flux and thin-slab solidification in a csp funnel-type mold with electromagnetic braking. Metallurgical Research and Technology, Vol. 117, 2020, pp. 602–605. 5. Weng, Y. M., Y. S. Han, and Q. Liu. Optimization of multi-fields coupled molten steel behavior in bloom continuous casting. Iron and Steel, Vol. 53, 2018, pp. 53–60.
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