Operation method for liquid-solid fluidization bed coarse slime sorting device capable of adjusting water speed in height direction

Abstract

Disclosed is an operation method for a liquid-solid fluidization bed coarse slime sorting device capable of adjusting the water speed in the height direction. Coarse slime evenly enters a cylinder body of a fluidization bed through a scattering plate. Coarse slime particles are gradually layered according to the final sedimentation velocity. Low-density coarse slime particles move upwards to enter an overflowing concentrate collection mechanism to be discharged from a concentrate discharging pipe and used as concentrate. High-density coarse slime particles move downwards to enter the bottom of the cylinder body of the fluidization bed. Meanwhile, the concentration of the coarse slime particles inside the cylinder body of the fluidization bed is adjusted through a drainage pipeline, and the equal settling ratio among the coarse slime particles is increased. A controller controls an ore discharge execution mechanism to discharge ore automatically. A frequency converter control pump controls the speed of water entering a water inlet pipe, and the sorting density of the liquid-solid fluidization bed for coarse slime is adjusted. The sorting time of the coarse slime in the fluidization bed is prolonged, sorting of the coarse slime on the whole bed layer height according to the density is enhanced, and the liquid-solid fluidization bed coarse slime sorting device has the obvious advantages for hard sorting and extreme hard coal slime sorting compared with a traditional fluidization bed coarse slime sorting machine.

Description

technical field [0001] The invention relates to a high-efficiency separation device for coarse coal slime, in particular to an operation method of the coarse coal slime separation device for a liquid-solid fluidized bed with adjustable water velocity in the height direction. Background technique [0002] With the increasingly severe environmental situation in our country, more and more attention has been paid to the efficient and clean separation of coal. With the further improvement of coal mining mechanization, the fine-grained coal content in raw coal is increasing, and the upper limit of fine-grained coal separation particle size is reduced with the popularization and application of flotation columns. Crude. The sorting density of lump coal increases gradually with the decrease of particle size. Low-density fine-grained coal directly enters the clean coal without sorting, resulting in the back ash of the clean coal. In this way, the coarse coal between gravity separatio...

AI Technical Summary

Problems solved by technology

However, due to the characteristics of the separation principle of the liquid-solid fluidized bed coarse coal slime separator, the high-ash fine mud in the feed will seriously pollute the clean coal. Desliming devices such as high-frequency screens and slime centrifuges, some high-ash fine mud still exists in the final clean coal, which affects the separation effect

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