Flow Characteristics of Ore Slurry Injection Process in the Intermediate Warehouse of Deep-sea Ore Hydraulic Transmission

Document Type : Regular Article


1 School of Mechanical and Electrical Engineering, Central South University, Changsha, Hunan, 410083, China

2 Department of Energy and Electrical Engineering, Hunan University of Humanities, Science and Technology, Loudi, Hunan 417000, China

3 State Key Laboratory of High-Performance Complex Manufacturing, Changsha, Hunan 410083, China



This study proposes a new intermediate warehouse to prevent the problem that the ore in the vertical pipeline hydraulic lifting system blocks the nozzle during the process of being sucked into the lifting hard tube. A mathematical model and a finite element model of ore transport are established. Numerical simulation and experimental research are performed on the process of ore injection into the intermediate warehouse. Results show that the proposed intermediate warehouse has higher ore transmission efficiency, smaller pressure pulsation, and more stable transmission process compared with the traditional structure scheme. The larger the slurry conveying flow, the shorter the time required to convey the ore. In the process of slurry injection, the closer to the inlet, the more uneven the velocity distribution on the Z section, and the more concentrated the dynamic pressure. The closer to the lower end of the intermediate warehouse, the more dispersed the dynamic pressure, and the fluctuation of dynamic pressure in the intermediate warehouse is the main cause of unstable flow. The feed flow has a great influence on the stress state of the intermediate warehouse structure, the ore transfer time, and the stress decay period. The feed flow rate should be reasonably selected to meet the working requirements.


Cheng, X. R., R. N. Li and Y. Gao (2013). Numerical research on the effects of impeller pump-out vanes on axial force in a solid-liquid screw centrifugal pump. Iop Conference Series: Materials Science & Engineering 33(1), 257-260.##
Dasheng, T., Y. Ning, G. Dewen, X. Hong and X. Jianxin (2015). Experimental study of manganese nodules pump in deep-sea mining. The Ocean Engineering 33(04), 101-107.##
Felippa, C. A. and J. S. Chung (1981). Nonlinear Static Analysis of Deep Ocean Mining Pipe-Part I: Modeling and Formulation. Journal of Energy Resources Technology 103(1), 11-15.##
Gazis, I. Z., T. Schoening and E. Alevizos (2018). Quantitative mapping and predictive modeling of Mn nodules' distribution from hydroacoustic and optical AUV data linked by random forests machine learning. Biogeosciences 15(23), 7347-7377.##
Grebe, H. (1997). General mathematical model for strand connections between mobile deep-sea equipment and their parent stations. University of Siegen, Siegen, Germany.##
Hailiang, X. (2008). Research on the pump–vessel combined ore lifting equipment for deep-sea rigid pipe mining system. Journal of Offshore Mechanics & Arctic Engineering 130(1), 244-254.##
Hai-Liang, X., Chen, W. and C. Xu (2019). Cavitation performance of multistage slurry pump in deep-sea mining. AIP Advances 9, 105024.##
Hailiang, X., C. Wei and H. Wengang (2020). Hydraulic transport flow law of natural gas hydrate pipeline under marine dynamic environment. Engineering Applications of Computational Fluid Mechanics (14)1, 507-521.##
Hoffmann, E. O. (1995). Behaviour of flexible interconnection lines between moving underwater devices and floating stations. University of Aachen, Aachen, Germany.##
Xu, H., G. Zhou, W. Wu and B. Wu (2012). Numerical calculation and analysis of solid-liquid two-phase flow in deep sea mining storage tank transportation equipment. Journal of Central South University 43 (1), 111-117.##
Yang, F. Q., H. L. Xu, W. R. Wu and B. Wu (2011). Geometric nonlinear static force analysis on the flexible mineral transporting pipe for sea mining. Proceedings of the 4rd ICMEM International Conference on Mechanical Engineering and Mechanics. August 11-12, Suzhou, P. R. China, p469-493.##