Gravity classification and immersive screen combined classifying method and device utilizing same

Abstract

Disclosed are a gravity classification and immersive screen combined classifying method and a device utilizing the same. Interference settlement, shallow settlement and screening classification are combined by arrangement of immersive screens, a water raise pipe and inclined plates. Materials are classified by a first screening classification chamber, an interference settlement classification chamber, a shallow settlement classification chamber and a second screening classification chamber in a multiple stage manner, so that classification effect of the materials is enhanced. Since fluid pressure provides power for classification of the materials, classification effect is enhanced further while power loss is saved. The adaptability of the device to flow states of fed materials is improvedgreatly. The usage of raise water is reduced, and the unit area treatment capacity and classification efficiency of the device are improved. The overflow grain size is controlled severely. The devicehas the main function of classifying and the auxiliary function of screening, and is simple and compact in structure, small in floor area, simple in operation method and wide in practicability.

Description

technical field [0001] The invention relates to a fine-grained mineral composite classification method and device, in particular to a gravity classification and submerged screen composite classification method and device suitable for the classification or separation of coarse coal slime and quartz sand. Background technique [0002] In order to meet the requirements of fine coal preparation, reduce the burden of flotation and increase the yield of clean coal, many coal preparation plants have adopted the coarse coal slime separation process combined with the flotation process to treat coarse coal slime and fine coal slime respectively. When the feed particle size range of coarse coal slime separation equipment is 1-0.25mm, the separation effect is the best, and the upper limit of micro-bubble flotation is also about 0.25mm. Therefore, in order to realize the organic combination of the two processes, it is necessary to use effective classification equipment to control the cla...

AI Technical Summary

Problems solved by technology

Fine particle screening equipment is strictly classified according to particle size, but the screening efficiency of fine particle screening equipment is low, and there are problems of screen wear and blockage

In recent years, with the development of coal preparation technology and the improvement of mechanical level, the screening efficiency of fine particle screening equipment has been improved, but relying on vibration and rotation to move materials and prevent clogging requires more power consumption

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