Study on flight and collision process of molten blast furnace slag

WANG Kai; YI Chui-jie; HU Feng-chao; ZHAN Sheng

doi:10.19591/j.cnki.cn11-1974/tf.2020050018

Volume 40 Issue 6

Dec. 2022

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Powder Metallurgy Technology > 2022 > 40(6): 535-540. > DOI: 10.19591/j.cnki.cn11-1974/tf.2020050018

WANG Kai, YI Chui-jie, HU Feng-chao, ZHAN Sheng. Study on flight and collision process of molten blast furnace slag[J]. Powder Metallurgy Technology, 2022, 40(6): 535-540. DOI: 10.19591/j.cnki.cn11-1974/tf.2020050018

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Study on flight and collision process of molten blast furnace slag

WANG Kai^{1, 2},
YI Chui-jie^{2, 3, ,},
HU Feng-chao^{2, 3},
ZHAN Sheng^{2, 3}

1.
School of Mechanical and Automotive Engineering, Qingdao University of Technology, Qingdao 266525, China
2.
Key Lab of Industrial Fluid Energy Conservation and Pollution Control, Ministry of Education, Qingdao University of Technology, Qingdao 266525, China
3.
College of Mechanical and Electrical Engineering, Qingdao University, Qingdao 266000, China

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Corresponding author:
YI Chui-jie, E-mail: chuijieyi@vip.163.com
Received Date: December 13, 2020
Accepted Date: December 13, 2020

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Abstract

Abstract

The mathematical model was established for the flight process of the molten blast furnace slag after the centrifugal graining, and the model was discretely solved by the Runge-Kutta method. The results show that, the flight distance of the slag droplets along the x direction is proportional to the diameter and the initial velocity of droplets. Due to the air flow resistance and gravity, the velocity of droplets decreases with time, and then increases slightly. Critical impact velocity of the droplets was proposed by analyzing the excess rebound energy of the slag droplets after collision with wall. The results indicate that, the critical impact velocity is an interval, and the larger the droplets, the lower the bounds. The experiments were performed with the initial droplet velocities of 10, 12, and 14 m·s^‒1. The results indicate that, the actual falling distance of the slag droplets is greater than the theoretical values, because the initial velocity of the slag droplets is less than the linear velocity of the granulation plate. Meanwhile, the impact velocity of the slag droplets is between the upper and lower bound, thus no adhesion occurs.
- blast furnace slag,
- flight dynamics,
- collision,
- mathematical model

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References

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