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Experimental Research on Hydraulic Collecting Spherical Particles in Deep Sea Mining

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  • Guocheng Zhao

    (State Key Laboratory of Ocean Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
    Collaborative Innovation Center for Advanced Ship and Deep-Sea Exploration, Shanghai 200240, China)

  • Longfei Xiao

    (State Key Laboratory of Ocean Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
    Collaborative Innovation Center for Advanced Ship and Deep-Sea Exploration, Shanghai 200240, China)

  • Tao Peng

    (State Key Laboratory of Ocean Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
    Collaborative Innovation Center for Advanced Ship and Deep-Sea Exploration, Shanghai 200240, China)

  • Mingyuan Zhang

    (State Key Laboratory of Ocean Engineering, Shanghai Jiao Tong University, Shanghai 200240, China)

Abstract

Hydraulic collecting is the key technology in deep sea mining and dredging engineering. It determines economic benefits of the project and environmental issues. However, mechanistic studies of hydraulic collecting are rarely described. In this study, the mechanism of collecting spherical particles is researched by dimensional analysis and experimental study. The experimental system is established to carry out three kinds of tests including 253 different test cases. The empirical model of collecting performance prediction is established by the tests of vertical force characteristics and vertical incipient motion characteristics of particles in suction flow field. The results show that the vertical suction force coefficient ( C vs ) decreases exponentially with the ratio of bottom clearance to diameter of the particle ( h / d ), increases linearly with the ratio of diameter of the suction pipe to diameter of the particle ( D / d ), and is nearly independent of Reynolds number ( Re ). The empirical formula of vertical force and criterion-formula of vertical incipient motion of particles are obtained with the maximum tolerance less than 15%. The phenomenon that the vortex could help strengthen the suction force was observed in the tests. In addition, the characteristics of suction flow field were obtained by flow visualization tests, and applied to explain the force characteristics of particles in the suction flow field.

Suggested Citation

  • Guocheng Zhao & Longfei Xiao & Tao Peng & Mingyuan Zhang, 2018. "Experimental Research on Hydraulic Collecting Spherical Particles in Deep Sea Mining," Energies, MDPI, vol. 11(8), pages 1-19, July.
    • Handle: RePEc:gam:jeners:v:11:y:2018:i:8:p:1938-:d:159958
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    References listed on IDEAS

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    1. Jeffrey Bury, 2005. "Mining Mountains: Neoliberalism, Land Tenure, Livelihoods, and the New Peruvian Mining Industry in Cajamarca," Environment and Planning A, , vol. 37(2), pages 221-239, February.
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    1. Hao Jia & Jian Yang & Xianghui Su & Qiu Xia & Kexin Wu, 2022. "Theoretical Prediction on Hydraulic Lift of a Coandă Effect-Based Mining Collector for Manganese Nodule," Energies, MDPI, vol. 15(17), pages 1-12, August.

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