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Hydrocyclones used for separating coal particles (<2 mm) by sizes suffer from particle misplacement related to different particle densities. This paper presents a numerical study on the flows and performance of hydrocyclones by a validated two-fluid model. Involute and laminar spiral inlet configurations with the potential for reducing the adverse effect of particle density are investigated at different feed solid concentrations and particle densities. Numerical results show that laminar spiral inlet configuration leads to less energy consumption and better mitigates the misplacement of coarse and fine particles at overflow and underflow compared with involute inlet configuration. Such advantages become less evident for dilute operations and heavy-particle feeds. Fluid flows and particle behavior are analyzed in detail. The roles of short-circuit and secondary flows near the vortex finder as well as the downward flow in the spigot area are thus revealed related to particle misplacement for cyclones with different inlets.
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Yu, A., Zhao, D., Rudman, M., Jiang, X., Selomulya, C., Zou, R., Yan, W., Zhou, Z., Guo, B., Shen, Y., Kuang, S., Chu, K., Yang, R., Zhu, H., Zeng, Q., Dong, K., Strezov, V., Wang, G., Zhao, B., Song, S., Evans, T., Mao, X., Zhu, J., Hu, D., Pan, R., Li, J., Williams, R., Luding, S., Liu, Q., Zhang, J., Huang, H., Jiang, Y., Qiu, T., Hapgood, K. & Chen, W.
Australian Research Council (ARC), Jiangxi University of Science and Technology, Jiangsu Industrial Technology Research Institute, Fujian Longking Co Ltd, Baosteel Group Corporation, Hamersley Iron Pty Limited, Monash University, University of New South Wales, University of Queensland , Western Sydney University, Macquarie University
31/12/16 → 30/12/21