A coal preparation and desliming system

Abstract

The invention provides a coal dressing and desliming system. The coal dressing and desliming system comprises a raw coal classifying screen, a crushing device, a desliming screen, a heavy medium shallow groove sorting machine, a coal slime barrel, a hydrocyclone, a thickener, an arc screen, a filtering machine and a coal slime centrifugal machine. According to the coal dressing and desliming system, the size of a screen plate of the desliming screen is changed into 3 mm from 6 mm, gangue which is 3 mm-6 mm in size and cannot be discharged due to unavailable washing of raw coal in the original design is effectively treated and discharged, accordingly, the ash content of obtained the powdery cleaned coal is reduced to be lower than 6 wt%, the quality and the level of the powdery cleaned coal are improved, the powdery cleaned coal with the extremely low ash content is obtained, the selling price of products is greatly increased, and economic benefits are effectively increased. Meanwhile, high-power equipment including six arc screens, three centrifugal machines, one first sealing tape machine, one scraper conveyor and one second sealing tape machine can be omitted, the power consumption is reduced, meanwhile, investment on the equipment is reduced, and cost is greatly reduced.

Description

technical field [0001] The invention belongs to the field of coal mines, in particular to a coal preparation and desliming system. Background technique [0002] China is the world's largest coal producer and consumer, and the environmental problems caused by coal utilization are becoming more and more prominent. Words such as smog, PM2.5, and inhalable particulate matter are often seen in newspapers, mainly in coal mines. Under the condition that the degree of coal mechanization is getting higher and higher, the quality of raw coal is getting worse and worse. The increase of suspended particles in the air is closely related to the smoke and gas produced by coal-fired power plants, steel, cement and other coal-fired industries. In order to effectively utilize coal resources and reduce environmental pollution caused by coal burning, clean coal technology must be implemented. The source of clean coal technology is coal washing, through which gangue in raw coal can be removed, ...

AI Technical Summary

Problems solved by technology

This kind of desliming system, under the production mode of full washing in the coal preparation plant, the amount of 1.5-6mm slime is small, but this small amount of slime has to pass through 6 second curved screens 11 and 3 centrifuges 12. 1 first tape machine 13, 1 scraper machine 14 and 1 second tape machine 15. These high-power equipment are reloaded into the warehouse, resulting in a huge waste of electricity

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