Underground coal high-gravity field separation system and separation process

Abstract

The invention relates to the field of mineral processing and separation, in particular to an underground coal high-gravity field separation system and a separation process. The separation system involves a classification hydrocyclone set, a high-gravity field separator, a feeding pump and a conveying pump, wherein coal collected underground is firstly classified through classification hydrocyclones, then fed into the high-gravity field separator through the feeding pump to be separated, and finally conveyed to the next link through the conveying pump to be dehydrated. The separation system is small in number of matched equipment, small in occupied area, free of complex pipelines and suitable for underground operation, and the high-gravity field separation machine provides high-strength centrifugal acceleration, can achieve rapid separation of coal and gangue particles in the radial direction and the tangential direction, and achieves effective separation of the fine coal and gangue particles.

Description

technical field [0001] The invention relates to the field of mineral processing and sorting, in particular to an underground coal supergravity field sorting system and a sorting process. Background technique [0002] With the continuous development of fully mechanized mining technology, the content of fine-grained coal in raw coal is increasing, and the content of raw coal <6mm can reach 60%. At the same time, a large amount of gangue in the faults of the working face and the roof and floor of the coal seam is mixed into the raw coal, and the raw coal is generally not processed underground, and is transported to the mine by the mine hoisting and transportation system for gangue sorting operations. This makes the gangue in the coal flow occupy the specified output of mine raw coal when the raw coal is lifted into the mine, resulting in a large amount of ineffective transportation and greatly reducing the actual production capacity of the mine. Gangue will cause unnecessar...

AI Technical Summary

Problems solved by technology

Shallow groove sorting machine has simple structure, large processing capacity, effective sorting particle size range of 13-300mm, sorting accuracy is higher than jigging sorting, but it occupies a large area, the chain scraper is easy to wear, and can't adjust the size of <6mm Effective separation of raw coal; the lower limit of the effective particle size of dense medium cyclone separation is 0.5mm, but as a heavy medium separation process, it must be equipped with a medium purification and recovery process, which increases the system footprint and increases the coal preparation cost of the enterprise put in

[0006] The TBS separator has a simple structure and is relatively compact, with a small footprint, no need for power, low energy consumption, and low coal preparation costs. It is mainly used for coarse coal slime separation, and the separation particle size range is 3-0.5mm. Sorting accuracy is affected by the particle size ratio of the incoming material. When the ratio of the maximum particle size to the minimum particle size is about 4, the separation effect is better, but it is difficult to control the particle size ratio of the incoming material at about 4 in actual separation.

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