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Accounting & Marketing

ISSN: 2168-9601

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6648 High Impact Mineral Processing Journals

Photoelectric intelligent dry type coal separator is a kind of  dry type coal separation equipment based on advanced imaging and artificial intelligence technology. By using the material characteristics acquired by X-ray imaging system, coal and gangue can be automatically analyzed and identified, and the high-pressure air can be controlled to blow the target to realize fully-automatic raw coal separation. It has the advantages of high separation accuracy, greatly reducing the cost of electricity and manpower and featuring easy equipment maintenance and strong adaptability to coal types. The paper examines the various factors that influence the breakage of particle agglomerates resulting from impact. Numerical simulations of polydisperse spherical agglomerates impacting orthogonally on a target wall have been performed to study the effects of impact velocity, solid fraction, contact density, and the local arrangement of particles near the impact zone. Results of simulations show distinct fracture patterns for dense agglomerates above a critical impact velocity whereas for loose agglomerates disintegration occurs under identical testing conditions. Either fracture or disintegration may occur for agglomerates with an intermediate packing density. It is also demonstrated that, for agglomerates with intermediate packing densities, the mode of failure can change from disintegration to fracture by either increasing the contact density or changing the location on the agglomerate surface, which is used as the impact site. Particle fracture is the elementary process that governs comminution. Understanding this elementary fracture process is indispensable to the development of improved size reduction techniques. The Ultrafast Load Cell (UFLC), has been used to investigate the deformation and fracture of single particles subject to impact. The theoretical background of the measurements is presented in detail. The Ultrafast Load Cell allows the measurement of three fundamental deformation and fracture characteristics of particulate materials: the particle fracture energy, the particle strength and the particle stiffness. These measurements can be made under impact loading similar to the conditions in typical industrial ball mills. The effect of material type, particle size and particle shape on the three fundamental fracture characteristics of brittle materials is investigated. The fracture characteristics were found to be independent of the rate of strain at rates expected to be found in industrial comminution equipment. Two practical applications of the measurements are presented and the use of the Ultrafast Load Cell to study thermally assisted comminution of quartz is discussed in detail.

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Citations: 487

Accounting & Marketing received 487 citations as per Google Scholar report

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