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- Title
Numerical Study on Metallurgical Effect of Filtering Weir with Multi-stepped Orifices in Tundish.
- Authors
Qin, Xufeng; Cheng, Changgui; Chen, Hao; Li, Yang; Jin, Yan
- Abstract
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 μm, especially the removal rate of inclusion of 2 and 5 μm increases to 63 to 64 pct, which is 18 to 21 pct higher than that with a traditional weir.
- Subjects
WEIRS; SHEAR walls; ORIFICE plates (Fluid dynamics); DAMS; LIQUID surfaces; SHEARING force; HEAT transfer
- Publication
Metallurgical & Materials Transactions. Part B, 2024, Vol 55, Issue 3, p1910
- ISSN
1073-5615
- Publication type
Article
- DOI
10.1007/s11663-024-03075-5