Sorting method and sorting system for coal and coal gangue

Abstract

The embodiment of the invention discloses a coal and coal gangue sorting method and system, and the method comprises the steps: obtaining the pore size distribution of a plurality of selected sampling materials, determining the wavelength value of polarized electromagnetic waves according to the pore size distribution of the plurality of sampling materials, transmitting the polarized electromagnetic waves to a to-be-sorted material based on an electromagnetic wave transmitter, diffraction electromagnetic waves diffracted by the to-be-sorted materials are collected based on an electromagnetic wave receiver, diffraction images are generated according to the diffraction electromagnetic waves, and the types of the to-be-sorted materials are determined according to the diffraction images. The polarized electromagnetic waves can be incident into the to-be-sorted materials by a certain depth and are not influenced by the surface morphology of the to-be-sorted materials. Besides, the wavelength value of the polarized electromagnetic waves is determined according to the aperture distribution of the selected sampling materials, the diffraction effect and accuracy of the polarized electromagnetic waves can be improved, and the coal and coal gangue sorting method and system have high adaptability and can be widely applied and popularized.

Description

technical field [0001] The embodiments of the present invention relate to the technical field of coal sorting, and in particular, to a sorting method and sorting system for coal and coal gangue. Background technique [0002] In the process of coal mining, a large amount of solid waste such as coal gangue needs to be sorted out. At present, the method of image recognition is mainly used to sort coal and coal gangue. Specifically, visible light or infrared light is used to photograph the material, and the type of material is classified according to the surface characteristics of the material. In the laboratory environment, the surface of coal and coal gangue is clean and has a good sorting effect, but in the actual production process, the surface of coal and coal gangue is often stained with coal ash, which leads to the failure of surface characteristics and the sorting effect is obviously deteriorated. . Moreover, in some coal mines, there is almost no obvious difference bet...

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Problems solved by technology

[0002] A large amount of solid waste such as coal gangue needs to be sorted and removed during the coal mining process. At present, image recognition is mainly used to sort coal and gangue. Specifically, visible light or infrared light is used to photograph materials, and the material types are classified according to the surface characteristics of the materials. In the laboratory environment, the surface of coal and gangue is clean and has a good separation effect. However, in the actual production process, the surface of coal and gangue is often stained with coal ash, which leads to the failure of surface characteristics and the separation effect is significantly worse.

Moreover, there is almost no obvious difference in the appearance of coal and coal gangue in coal mines in some areas, and the image recognition technology using surface features cannot be applied

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