Coupling Simulation Method and Experiment of Vertical Stirring Mill Based on DEM−CFD

QU Tie; MA Lifeng; SONG Xianzhou; WANG Zhaohua; ZHANG Shengqi; ZHAO Yanlong; JI Haonan

doi:10.13779/j.cnki.issn1001-0076.2025.01.001

2025 Vol. 45, No. 1

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Article navigation > Conservation and Utilization of Mineral Resources > 2025 > 45(1): 15-22

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QU Tie, MA Lifeng, SONG Xianzhou, WANG Zhaohua, ZHANG Shengqi, ZHAO Yanlong, JI Haonan. Coupling Simulation Method and Experiment of Vertical Stirring Mill Based on DEM−CFD[J]. Conservation and Utilization of Mineral Resources, 2025, 45(1): 15-22. doi: 10.13779/j.cnki.issn1001-0076.2025.01.001

Citation:

QU Tie, MA Lifeng, SONG Xianzhou, WANG Zhaohua, ZHANG Shengqi, ZHAO Yanlong, JI Haonan. Coupling Simulation Method and Experiment of Vertical Stirring Mill Based on DEM−CFD[J]. Conservation and Utilization of Mineral Resources, 2025, 45(1): 15-22. doi: 10.13779/j.cnki.issn1001-0076.2025.01.001

Coupling Simulation Method and Experiment of Vertical Stirring Mill Based on DEM−CFD

1.
CITIC Heavy Industries Co., Ltd., Luoyang 471039, Henan, China
2.
College of Mechanical Engineering, Taiyuan University of Science and Technology, Taiyuan 030024, Shanxi, China
3.
Luoyang Mining Machinery Engineering Design Institute Co., Ltd., Luoyang 471039, Henan, China

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Corresponding author: WANG Zhaohua, wangzhaohua@tyust.edu.cn

Received Date: 24 September 2024

Publish Date: 15 February 2025

Abstract

Abstract

A coupling simulation method and experiment based on DEM−CFD were investigated to address the complex multi−phase coupling motion of spiral agitators, grinding media, and slurry inside the cylinder of a vertical stirring mill. Firstly, based on the working principle, the Discrete Element Method (DEM) was used to simulate the particle phase and Computational Fluid Dynamics (CFD) to simulate the fluid phase, respectively. A theoretical model of fluid−solid coupling inside the cylinder was constructed. Secondly, a simplified model of the experimental prototype was established, and the construction methods and parameters of the grinding sphere (DEM), slurry (CFD), and DEM−CFD coupling model were investigated, respectively. Then, the accuracy of different simulation models was verified by experiments. The results showed that the DEM−CFD simulation results were closer to the experimental values than DEM, there was a deviation of 5.43% between the torque obtained from DEM−CFD model and the experimental torque, while the DEM model had a deviation of 8.14%. By comparing the velocity, collision frequency, and agitator torque of the grinding spheres inside the cylinder, it was found that the slurry as a fluid domain had a significant impact on the movement of the grinding spheres. Its buoyancy and viscosity characteristics reduced the velocity and collision frequency, whereas it increased the torque of the spiral agitator.
- vertical stirred mill /
- DEM−CFD /
- discrete element analysis /
- fluid−solid coupling /
- velocity of grinding sphere /
- collision frequency

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References

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