Numerical simulation of the in-line pressure jig unit in coal preparation |
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| Authors: | KJ Dong SB Kuang A Vince T Hughes AB Yu |
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| Affiliation: | 1. School of Chemical Engineering and Technology, China University of Mining and Technology, Xuzhou 221116, China;2. School of Mechatronic Engineering, China University of Mining and Technology, Xuzhou 221116, China;1. Key Laboratory for Thermal Science and Power Engineering of Ministry of Education, Department of Thermal Engineering, Tsinghua University, Beijing 100084, China;2. Qianxuesen Laboratory of Space Technology, China Academy of Space Technology, Beijing 100094, China;3. College of Metallurgy and Energy, North China University of Science and Technology, Tangshan 063009, China;1. School of Chemical Engineering and Technology, China University of Mining and Technology, Xuzhou, Jiangsu 221116, China;2. Coal Mining and Designing Department, Tiandi Science & Technology Co. Ltd., Beijing 100013, China |
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| Abstract: | This paper presents a numerical study of the multiphase flow in an in-line pressure jig (IPJ), which is a high yield and high recovery gravity separation device widely used in ore processing but may have potential in coal preparation. The mathematical model is developed by use of the combined approach of computational fluid dynamics (CFD) for liquid flow and discrete element method (DEM) for particle flow. It is qualitatively verified by comparing the calculated and measured results under similar conditions. The effects of a few key variables, such as vibration frequency and amplitude, and the size and density of ragging particles, on the flow and separation performance of the IPJ are studied by conducting a series of simulations. The results are analyzed in terms of velocity field, porosity distribution and forces on particles. The findings would be helpful in the design, control and optimisation of an IPJ unit. |
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