Study on the motion and heat transfer behavior of semi-steel droplet during centrifugal granulation-water curtain cooling process

HE Wenchao; LIU Zenghao; LÜ Xuewei

doi:10.7513/j.issn.1004-7638.2025.04.015

Volume 46 Issue 4

Aug. 2025

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HE Wenchao, LIU Zenghao, LÜ Xuewei. Study on the motion and heat transfer behavior of semi-steel droplet during centrifugal granulation-water curtain cooling process[J]. IRON STEEL VANADIUM TITANIUM, 2025, 46(4): 111-118. doi: 10.7513/j.issn.1004-7638.2025.04.015

Citation:

HE Wenchao, LIU Zenghao, LÜ Xuewei. Study on the motion and heat transfer behavior of semi-steel droplet during centrifugal granulation-water curtain cooling process[J]. IRON STEEL VANADIUM TITANIUM, 2025, 46(4): 111-118. doi: 10.7513/j.issn.1004-7638.2025.04.015

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Study on the motion and heat transfer behavior of semi-steel droplet during centrifugal granulation-water curtain cooling process

doi: 10.7513/j.issn.1004-7638.2025.04.015

1.
College of Metallurgy and Power Engineering, Chongqing University of Science and Technology, Chongqing 401331, China
2.
College of Materials Science and Engineering, Chongqing University, Chongqing 400044, China

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Received Date: 2025-03-03
Available Online: 2025-08-31
Publish Date: 2025-08-31

Abstract

Abstract

During the centrifugal granulation-water curtain cooling process, the sequential heat exchange occurs between the molten semi-steel droplet and vapor, followed by their interaction with the water curtain and vapor. Studying the motion and heat transfer behavior of these droplets is crucial for the design of granulation equipment and water curtain processes. A flight dynamics model and a heat transfer model were established to analyze the effects of rotary speed, droplet size, water curtain velocity, and water curtain thickness on droplet trajectory and temperature through simulation calculations. The results indicate that the vertical distance of the droplet upon reaching the sidewall of the device decreases with increasing cup rotation speed, droplet size, and decreasing water curtain flow rate and thickness. Among them, the rotary speed has a greater impact on the flight trajectory of the droplets. When the rotation speed increases from 15 r/s to 30 r/s, the vertical flight distance of the droplet decreases from 0.410 m to 0.094 m. Additionally, the temperature of the droplet upon reaching the sidewall of the device increases with increasing cup rotation speed, droplet size, and decreasing water curtain velocity and thickness. When the water curtain thickness increases from 1 mm to 4 mm, the droplet temperature decreases from 1127.41 K to 796.29 K.
- semi-steel,
- centrifugal granulation-water curtain cooling,
- trajectory,
- temperature of droplet

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References(27)

References

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