High ash fine grain coal slurry separation equipment and method

Abstract

The invention provides a high ash fine grain coal slurry separation equipment and method which areapplicable to the field of coal washing. The separation equipment comprises four parts, specifically afeeding system, a mineralization system, a separation system and a pulse water flow control system. The equipment is characterized in that a coal slurry mineralization area is separated from a separation area, and the ore separation system is internally provided with a damping block and a pulse water flow device. Flotation materials are fed into the feeding system, the size mixing operation is completed, coal slurry subjected to size mixing enters the mineralization system to be subjected to turbulent collision, mineralized bubbles are formed, the mineralized bubbles enter the separation system after passing through a disorder eliminating pipe, meanwhile the pulse water flow control system supplies the separation system with pulse water flows with certain frequency and waveform, the finecoal ash content is lowered, and the coal slurry separation selectivity is improved. Recycling of low ash coarse particles is effectively improved, high ash thin slurry carried by water flow and the thin slurry covering the surface of the particles are beneficially reduced by means of the damping block and the pulse water flow effect, and the separation selectivity is improved. The equipment has high coal slurry adaptability on different coal qualities, the separation effect is good, the separation efficiency is high, the production operation cost is low, and the economical benefit is outstanding.

Description

technical field [0001] The invention relates to a sorting device and method for high-ash fine-grained coal slime, and is especially suitable for a sorting device and method for high-ash fine-grained coal slime used in the technical field of mineral flotation. Background technique [0002] In recent years, with the improvement of coal mining mechanization and the deterioration of coalfield geological conditions, the content and ash content of coal slime are getting higher and higher, and the particle size is getting finer and finer. The separation of coal slime presents the characteristics of "fine, miscellaneous and difficult". The increase of the ash content of the coal slime increases the content of the medium and high ash fine mud, which is easy to flow into the foam layer with the water to form inclusions, resulting in the continuous increase of the ash content of the clean coal and the deterioration of the flotation selectivity, which becomes the bottleneck restricting t...

AI Technical Summary

Problems solved by technology

Its disadvantages are reflected in: shallow flotation tank, thin clean coal foam layer (200-300mm), no foam beneficiation process, clean coal ash content is often high, and usually requires secondary beneficiation to achieve high-efficiency high-ash difficult coal separation Separation: Mechanical intermittent forced foam scraping, high ash and fine mud content entrained in the foam, separated by tank, the pulp forms a significant ash gradient

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