Dense medium coarse slime sorting device and sorting process

Abstract

The invention provides a dense medium coarse slime sorting device and a sorting process. Four rows of water spraying nozzles of a raw coal desliming screen of the sorting device are arranged, and the size of screen cuts is 1 mm. Two rows of water spraying nozzles are formed in a fine coal slime vibration arc desliming screen, and screen bars are prismatic. The height of an overflow weir of a TBS sorting machine can be adjusted. A dense medium hydrocyclone is adopted for a main washing process; according to the auxiliary washing process, coal slime sequentially passes through a conical inclined plate settling pond, the TBS classifying hydrocyclone, the TBS sorting machine, an ore concentration arc desliming screen, a clean coal magnetic tail barrel, a concentration hydrocyclone set, the fine coal slime vibration arc desliming screen and a fine coal slime centrifugal machine to obtain clean coal, the fine coal slime is floated to obtain the fine coal, and the rest is tailing. The sorting device enables the dense medium coal selecting process to be further optimized. After the coarse coal slime is separated from a dense medium main washing system, the coarse coal slime sorting process is more reasonably, and the recovery efficiency of the tail fine coal is obviously improved; as a coarse coal slime sorting system is improved, the content of ash in the coarse coal slime is lowered, the dense medium main washing sorting density and the sorting precision are effectively improved, and the effect of dense medium main washing is ensured.

Description

technical field [0001] The technology of the invention is a system device for coal preparation using a dense medium, and a coal separation process for coal preparation using the system device, and relates to the separation technology of coarse and fine coal. Background technique [0002] my country is a poor country of coking coal. In my country's coal reserves, gas coal, fat coal, coking coal and lean coal used as coking coal account for only 27.6% of my country's total coal resources, especially fat coal and coking coal, which play a skeleton role in coking, only account for 10.5% %, coupled with the high ash and sulfur content of most fertilizers and coking coal, and poor selectivity, the recovery rate of clean coal is generally only 30% to 60%, which is very scarce and precious. [0003] After washing and processing, the raw coal is divided into clean coal, medium coal and gangue. Clean coal is used for coking, while medium coal is used as power coal. The price differen...

AI Technical Summary

Problems solved by technology

When the quality of raw coal changes greatly, the existing TBS separator control method cannot guarantee that the +0.25mm low-ash clean coal rises to the overflow surface of the TBS separator with the overflow of the TBS separator, resulting in the loss of clean coal in In the tailings of TBS separator

[0018] 2. During the separation process of the TBS separator, the high-ash fine peat slime enters the concentrate of the TBS separator with the rising water flow. The existing desliming process has a poor desliming effect on the concentrate of the TBS separator. Coal slime clean coal contains more high-ash fine mud, which directly leads to an increase in the ash content of coarse coal slime, which has a certain impact on the yield of clean coal

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