Raw coal sorting process

Abstract

A raw coal separation process with high economic benefit and low cost comprises the steps of : classifying the raw coal by classifying screen; outputting the obtained underscreen materials, and washing and separating overscreen materials in a jigging machine; outputting obtained waste rocks and middlings, inducing the obtained cleaned coal blocks into staged dewatering screen to give underscreen water which is sent into deep cone concentration tank; outputting obtained large-size cleaned coal blocks, inducing the obtained small-size cleaned coal blocks into spin extractor to give underscreen water which is sent into deep cone concentration tank; outputting small-size cleaned coal blocks and inducing the centrifugate into deep cone concentration tank; underflow after condensation by the deep cone concentration tan entering into swirler; underflow in swirler entering into high frequency screen and overflowing liquid entering into slant-tube thickener; overscreen materials of high frequency screen entering into spin extractor and underscreen water entering into deep cone concentration tank; overflowing liquid in deep cone concentration tank entering into slant-tube thickener; overflowing liquid in slant-tube thickener entering into circulating water tank; condensed underflow entering into belt type press filter; outputting obtained coal slime, and the filtrate entering into circulating water tank.

Description

technical field [0001] The invention relates to a coal washing method, in particular to a raw coal separation process. Background technique [0002] The coal preparation process commonly used in all coal mines is as follows: coal is lifted from the underground into the raw coal preparation workshop, and is classified through a raw coal grading sieve with a mesh size of 50mm, and the underscreen material (coal with a particle size of less than 50mm) enters the raw coal bunker through a belt conveyor. The sieve material (coal with a particle size greater than 50mm) is simply hand-selected manually to pick out large pieces of gangue and sundries (such as ironware, wood, etc.) and enter the moving screen. The gangue discharged from the moving screen is transported to the gangue hill or comprehensively utilized. The lump coal screened out by the dynamic screen enters the crusher, and the coal particle size is crushed to a particle size of less than 50mm, and then mixed with the s...

AI Technical Summary

Problems solved by technology

When washing coal in the coal preparation plant, the raw coal (with a particle size of 0mm to 50mm) in the raw coal bunker is not classified and washed, which will increase the content of coal slime (with a particle size of 0mm to 0.5mm), and the slime water process is complicated, and the slime water treatment facilities, A lot of equipment, high operating costs, and large investment

Images