High-precision intelligent separation system and method for underground coal gangue grading

Abstract

The invention discloses a high-precision intelligent separation system for underground coal gangue grading, and relates to the field of coal-gangue separation. The high-precision intelligent separation system comprises an alignment feeding device, a first belt conveying device, a cooling dust removal device, a heating grading device, a second belt conveying device, an infrared recognition device, an intelligent sorting center and a coal-gangue separation device. Mined raw coal is conveyed by a belt after being aligned, is subjected to cooling dust removal and heating grading in sequence and then is subjected to infrared recognition, and coal-gangue separation is carried out under the action of the intelligent sorting center and the coal-gangue separation device. All the devices can be disassembled and reassembled, the environmental influence is small, assembly and disassembly are easy, the recognition precision is high, and the underground adaptability is high. The coal dressing process is optimized, and the occupied area of a chamber is reduced. Meanwhile, separated gangue can be directly subjected to underground backfilling, the coal-gangue separation efficiency is improved, the production cost is effectively saved, and the process waste is reduced.

Description

technical field [0001] The invention belongs to the technical field of coal gangue sorting, in particular to an underground coal gangue grading and high-precision intelligent sorting system and method. Background technique [0002] The existence of gangue in raw coal affects the quality of mined coal and increases the transportation cost of coal; traditional coal gangue separation methods are mainly divided into two methods: wet separation and dry separation. The raw coal is transported to the ground washing plant for correlation The sieving work is to screen out the crushed coal and gangue impurities, and the partially filled mine needs to be backfilled after secondary crushing of the screened gangue; this operation method has complicated procedures and cumbersome steps, which greatly affects the actual production capacity of the coal mine. [0003] With the development of green mining technology, some mining areas have begun to transfer the coal gangue sorting site to the ...

AI Technical Summary

Problems solved by technology

[0002] The existence of gangue in raw coal affects the quality of mined coal and increases the transportation cost of coal; traditional coal gangue separation methods are mainly divided into two methods: wet separation and dry separation. The raw coal is transported to the ground washing plant for correlation Screening work, screening out the crushed coal and gangue impurities, part of the mine filling needs to be backfilled after secondary crushing of the screened gangue; this operation method has complicated procedures and cumbersome steps, which greatly affects the actual production capacity of the coal mine

[0003] With the development of green mining technology, some mining areas have begun to transfer the coal gangue sorting site to the underground. The dense medium coal preparation method and the dynamic screen jigging method have been initially applied in the underground, but the process is complicated and the equipment occupies an area. In addition, in recent years, emerging coal gangue identification methods such as radar detection, electromagnetic wave detection, image recognition, etc. have been applied to some extent, but the actual mining environment of coal mines is complex and the working environment is harsh. Gangue identification methods are susceptible to interference from the external environment, and the adaptability of the device is poor. In actual work, the recognition accuracy is not high, and misjudgments and missed judgments are prone to occur. The sorting of gangue is not thorough, and many gangues are missed.

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