Underground rapid wind coal gangue separation device

Abstract

The invention relates to mine coal and gangue separation equipment, in particular to an underground quick coal and gangue separation device utilizing wind power. The underground quick coal and gangue separation device is especially suitable for separation of coal and gangue in the mine underground half-coal tunnel excavation. Coal and gangue mixtures with grain size smaller than 300 mm * 300 mm enter a wind power acceleration barrel 14 through a discharge port 1, coal gangue is blown by wind power of a high-pressure wind blowing port 10 to move in an accelerating mode and strikes towards an impacting plate 6 after being subjected to wind power acceleration of an annular high-pressure acceleration air cock 3, and in the process, the coal gangue with large lumpiness is broken, and separation of the coal and the gangue is completed. Light broken coal blocks are blown by wind power of an auxiliary high-pressure wind blowing port 7 to enter a coal discharge port 8 and fall down, and then the light broken coal blocks are conveyed to a coal bin through a coal conveying belt 12; due to the gravity, the heavy gangue directly falls on a gangue conveying belt 11 through a gangue discharge port 9 and is conveyed to a goaf for refilling the goaf. Through separation, the gangue will not ascend and can be directly used for refilling the goaf.

Description

[0001] Technical field: [0002] The invention relates to a mine coal gangue separation device, which is especially suitable for the separation of coal and gangue in the excavation of semi-coal and rock lanes under mine shafts. Through sorting, the gangue can be directly used for goaf filling without going into the well. Background technique [0003] With the development of my country's industry, the demand for energy is constantly increasing. Coal is still the main source of energy in my country. Therefore, while the degree of mechanization of coal mining is increasing, the output of gangue is also increasing. Dressing is an indispensable link in the production process of coal mines, especially under the premise of emphasizing the implementation of green environment production and realizing sustainable development, this production link is particularly important. [0004] At present, coal gangue separation mainly includes: gamma ray separation, manual separation, winnowing, wa...

AI Technical Summary

Problems solved by technology

Gamma ray sorting is mainly based on the different attenuation of gamma rays in coal and gangue, and then generates different electrical signals, which are fed back to the actuator to change the trajectory of coal and gangue, so as to achieve the separation of coal and gangue However, this method is likely to cause misselection due to the coal slime wrapping gangue; manual sorting is to select large pieces of gangue from the conveyor by hand, so that the speed of the conveyor belt on the conveyor cannot be too high. Therefore, this method has a large workload and low efficiency; due to the different densities of coal and gangue, the traditional open air separation relies on the buoyancy of the wind to separate coal gangue, but its dust is relatively large, and the separation environment is poor; water separation relies on the buoyancy of water to separate coal. Gangue has high efficiency, but it consumes a lot of water and has high investment costs, so it is not suitable for promotion in areas where water resources are scarce.

In view of the above method, and the above equipment are all above-ground sorting equipment, the equipment has a large volume and occupies a large area, so it is not suitable for underground coal and gangue separation.

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