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Fluid Flow in Continuous Casting Mold for Ultra-Wide Slab.
Gang Li1, Lingfeng Tu1, Qiangqiang Wang1
1College of Materials Science and Engineering, and Chongqing Key Laboratory of Vanadium-Titanium Metallurgy and Advanced Materials, Chongqing University, Chongqing 400044, China.
Materials (Basel, Switzerland)
|February 11, 2023
Summary
This study investigated the flow field in ultra-wide slab molds. Higher casting speeds reduced inactive surface zones, improving flow dynamics.
Area of Science:
- Materials Science
- Fluid Dynamics
Background:
- Ultra-wide slabs are crucial in manufacturing but lack detailed flow field research.
- Understanding flow dynamics is key to optimizing production and quality.
Purpose of the Study:
- To investigate the flow field characteristics in an ultra-wide slab mold.
- To analyze the impact of casting speed on flow patterns and surface velocity.
Main Methods:
- A 0.5-scale physical model of the mold was constructed using Perspex.
- Ink tracer experiments and contact measurements were employed to study the flow field.
- Casting speed effects on flow patterns and surface flow speed were analyzed.
Main Results:
- Observed various, transforming flow patterns within the mold.
- Jet momentum diffusion at the wide face reduced kinetic energy.
- Ultra-wide slab molds exhibited weaker upper flow intensity, leading to inactive surfaces and potential flux rims.
- Average flow speed distribution was C-shaped, increasing with casting speed.
- Increased casting speed from 0.9 to 1.4 m/s raised maximum average flow speed from 0.08 to 0.2 m/s.
- The proportion of low-flow speed zones decreased significantly with increased casting speed.
Conclusions:
- Flow field characteristics in ultra-wide slab molds differ significantly from conventional molds.
- Casting speed is a critical parameter influencing flow intensity and surface activity.
- Optimizing casting speed can mitigate issues like flux rim formation and improve surface flow.
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