Numerical Study on Metallurgical Effect of Filtering Weir with Multi-stepped Orifices in Tundish

• Published in: Metallurgical and materials transactions. B, Process metallurgy and materials processing science Vol. 55; no. 3; pp. 1910 - 1924
• Main Authors: Qin, Xufeng, Cheng, Changgui, Chen, Hao, Li, Yang, Jin, Yan
• Format: Journal Article
• Language: English
• Published: New York Springer US 01.06.2024; Springer Nature B.V
• Subjects: Characterization and Evaluation of Materials; Chemistry and Materials Science; Continuous casting; Control equipment; Efficiency; Energy consumption; Filtration; Flow control; Fluid dynamics; Inclusions; Liquid alloys; Liquid surfaces; Low temperature; Materials Science; Metallic Materials; Metallurgical analysis; Metallurgy; Nanotechnology; Orifices; Original Research Article; Physical simulation; Reynolds number; Shear stress; Steel products; Structural Materials; Surfaces and Interfaces; Thin Films; Tundishes; Turbulence models; Wall shear stresses
• ISSN: 1073-5615; 1543-1916
• DOI: 10.1007/s11663-024-03075-5

Herein, a novel filtering weir with multi-stepped orifices is proposed to solve the problem of ineffective removal of small inclusions with traditional flow control devices in tundishes. Without changing the installation position, three types of novel filtering weir were designed. The flow and heat transfer behavior, wall shear distribution of the weir and dam, and removal rate of inclusions with different sizes were compared and analyzed. A 1:0.4 scale water model was conducted to validate the flow field calculated by mathematical simulation. The results indicate that the filtering weir can extend the response time and promote the mixing of liquid steel, but has little impact on the residence time and dead volume fraction. Due to the influence of the flow, the near-wall velocity and wall shear stress of the weir and dam decrease, but the area of the low-temperature zone of liquid surface in tundishes increases. The multi-stepped orifices added on the weir increase the removal rate of inclusions below 50 μ m, especially the removal rate of inclusion of 2 and 5 μ m increases to 63 to 64 pct, which is 18 to 21 pct higher than that with a traditional weir.