Study on the effect of jet velocity on the characteristics of double-jet ore collection

IF 4.5 2区工程技术 Q2 ENGINEERING, CHEMICAL

Powder Technology Pub Date : 2025-03-08 DOI:10.1016/j.powtec.2025.120889

Xianghui Su, Ying Wang, Haoyu Wang, Zhe Lin, Zuchao Zhu, Hao Jia

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引用次数: 0

Abstract

In dual-jet deep-sea mining technology, jet velocity ratio significantly affects the acquisition rate. In this study, CFD – DEM method was adopted to explore the velocity, pressure and vortex characteristics of the collecting flow field and predict the harvesting performance at the jet velocity ratios of 0.625, 0.75 and 0.875. Based on the experimental and theoretical results, the influence of the velocity ratio on the flow field was revealed. For accurate particle motion characteristics at different jet velocity ratios, particle tracking method combined with Nadaraya - Watson regression was used to analyze particle motion. The results indicate that as the jet velocity ratio increases, the flow pattern becomes more complex, with an increase in both the complexity and intensity of vortices. Although particle velocity is enhanced, the unpredictability of particle movement also rises. Moreover, particles tend to accumulate in the fore board area, with the 0.625 jet velocity ratio exhibiting the least aggregation and the minimal impact on particles, thus achieving the highest overall collection efficiency.

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研究射流速度对双射流矿石收集特性的影响

在双射流深海采矿技术中，射流速度比对采集率有显著影响。本研究采用 CFD - DEM 方法探讨了射流速度比为 0.625、0.75 和 0.875 时采集流场的速度、压力和涡流特性，并预测了采集性能。基于实验和理论结果，揭示了速度比对流场的影响。为了准确分析不同射流速度比下的粒子运动特性，采用了粒子跟踪法结合 Nadaraya - Watson 回归法来分析粒子运动。结果表明，随着射流速度比的增加，流动模式变得更加复杂，涡旋的复杂性和强度都有所增加。虽然颗粒速度提高了，但颗粒运动的不可预测性也增加了。此外，颗粒倾向于聚集在前板区域，0.625 的喷射速度比表现出最少的聚集和对颗粒最小的影响，从而实现最高的整体收集效率。

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来源期刊

Powder Technology 工程技术-工程：化工

CiteScore

9.90

自引率

15.40%

发文量

1047

审稿时长

46 days

期刊介绍： Powder Technology is an International Journal on the Science and Technology of Wet and Dry Particulate Systems. Powder Technology publishes papers on all aspects of the formation of particles and their characterisation and on the study of systems containing particulate solids. No limitation is imposed on the size of the particles, which may range from nanometre scale, as in pigments or aerosols, to that of mined or quarried materials. The following list of topics is not intended to be comprehensive, but rather to indicate typical subjects which fall within the scope of the journal's interests: Formation and synthesis of particles by precipitation and other methods. Modification of particles by agglomeration, coating, comminution and attrition. Characterisation of the size, shape, surface area, pore structure and strength of particles and agglomerates (including the origins and effects of inter particle forces). Packing, failure, flow and permeability of assemblies of particles. Particle-particle interactions and suspension rheology. Handling and processing operations such as slurry flow, fluidization, pneumatic conveying. Interactions between particles and their environment, including delivery of particulate products to the body. Applications of particle technology in production of pharmaceuticals, chemicals, foods, pigments, structural, and functional materials and in environmental and energy related matters. For materials-oriented contributions we are looking for articles revealing the effect of particle/powder characteristics (size, morphology and composition, in that order) on material performance or functionality and, ideally, comparison to any industrial standard.