Results
Title

Research on the Collection Characteristics of a Hydraulic Collector for Seafloor Massive Sulfides.

Authors

Dai, Huan; Li, Yan

Abstract

Ore collection is very important in deep-sea mining for seafloor massive sulfide (SMS). In view of the characteristics of SMS ores produced by mechanical crushing, which contain coarse particles and a wide particle size distribution, in-depth research on the collection process with a device combining a rotary crushing head and a flat suction mouth was conducted. In this paper, solid–liquid two-phase flow in the hydraulic collection process with a drum rotation is carried out using the computational fluid dynamics-discrete element method (CFD-DEM), and the flow field characteristics and particle motion characteristics are analyzed. The results indicate that particles with a maximum diameter of 20 mm can be effectively collected when the suction velocity is 3 m/s. The collection process of SMS mainly goes through three stages: particle disturbance start-up, partial particle influx, and stable collection. In addition, the appropriate drum speed facilitates the collection of SMS ore. Finally, the correctness of the numerical method was assessed using similarity experiments. This work can be used to guide the design of underwater mining equipment.

Subjects

OCEAN mining; PARTICLE size distribution; TWO-phase flow; ORES; NEW business enterprises; PARTICLE motion; DISCRETE element method

Publication

Journal of Marine Science & Engineering, 2024, Vol 12, Issue 9, p1534

ISSN

2077-1312

Publication type

Academic Journal

DOI

10.3390/jmse12091534