Method and device for detecting flow field gangue coal of dense-medium shallow-slot sorting machine

Abstract

The invention provides a method for detecting flow field gangue coal of a dense-medium shallow-slot sorting machine. The method is characterized by comprising the following steps of: acquiring the density of a gangue coal seam mixed solution, comparing the density with a density threshold value of the gangue coal seam mixed solution when a gangue coal seam is in a blocked state, and judging that the gangue coal seam is in the blocked state when the density of the gangue coal seam mixed solution is greater than the threshold value. According to the detection method and the detection device, theblocked state is reflected by utilizing the density change of the gangue coal seam, the detection principle is simple, the detection effect is accurate, the real-time property is high, an alarm signal can be timely sent when the density exceeds the threshold value when the gangue coal seam is accumulated more and more, and the blockage of the whole flow field is avoided.

Description

technical field [0001] The invention relates to the field of coal preparation equipment, in particular to a method and device for detecting coal inclusions in the flow field of a dense-medium shallow tank separator. Background technique [0002] In the dense medium shallow tank separator, the clean coal and gangue are separated by the buoyancy of the dense medium. Due to the low density, the clean coal naturally floats on the liquid surface of the heavy medium through the upwelling due to the buoyancy effect, while the gangue will sink to the bottom of the heavy medium due to its high density, and the gangue will be discharged through the chain scraper. However, due to the existence of gangue, it will accumulate in a large amount in the middle layer of the dense medium. It cannot float to the liquid surface and output from the clean coal outlet, and because the density of gangue coal is similar to the density of the dense medium flow field, it will stay in the middle of the...

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Problems solved by technology

However, due to the existence of gangue, it will accumulate in a large amount in the dense medium layer

It cannot float to the liquid surface and output from the clean coal outlet, and because the density of gangue coal is similar to the density of the dense medium flow field, it will stay in the middle of the flow field and cannot fall to the bottom of the flow field The gangue is discharged, and it is easy to form accumulation and cause blockage of the flow field

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