Dry-method lump coal sorting device

Abstract

The invention discloses a dry-method lump coal sorting device. The dry-method lump coal sorting device comprises a vibration queuing and feeding device, a lump raw coal slide way, CMOS image acquisition devices, lens dust removers, an image post-processing device, a signal transmission and control system, baffles, a controller, a clean coal channel, a middling coal channel and a gangue channel, wherein lump raw coals with granularities of 50-150mm are queued through the vibration queuing and feeding device, and then fed to the corresponding lump raw coal slide way, each CMOS image acquisition system acquires lump raw coal images at a speed of 3-8fps, the images are transmitted to a background image processing system, the system carries out feature extraction and grey-level calculation on the images, divides ashes into three threshold value ranges, converts signals with grey-level differences to electric signals, and then controls the angles of the baffles to guide clean coal, middling coal and gangue in the corresponding collection channels. The dry-method lump coal sorting device has the following advantages: dry-method sorting can be realized, dependence on water can be reduced, and sorting of lump coals in arid regions can be achieved; and the equipment is small in size, low in energy consumption, and capable of improving raw coal sorting accuracy and automation degree.

Description

technical field [0001] The invention belongs to the technical field of coal sorting machinery and equipment, and relates to a dry lump coal sorting device. Background technique [0002] At present, there are mainly two traditional methods for lump coal separation, one is dense medium separation; the other is jigging separation. More than 80% of the lump coal below 100mm in the current lump coal sorting is sorted by these two methods. From the point of view of separation principle, these two methods belong to the category of re-selection, that is, the separation of the two is achieved by means of the difference in density between coal and gangue. For the heavy medium separator, by adding heavy medium to prepare a heavy liquid with a density between the density of coal and gangue, the coal and gangue can be stratified in the sorting equipment, and the coal is further realized through the operation of equipment components. And gangue is excluded from the export of different p...

AI Technical Summary

Problems solved by technology

However, most of them have not been well applied due to problems such as dust removal, processing capacity, and energy consumption.

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