Classifying dropping-type coal slurry pretreating device

Abstract

The invention belongs to the field of coal slime powder pretreating, and specifically relates to a classifying dropping-type coal slurry pretreating device. The classifying drop-type coal slurry pretreating device provided by invention at least comprises a dropping box and a classifying dropping system, wherein a flotation agent feeding part and a coal slurry feeding part are correspondingly arranged above the classifying dropping system, the classifying dropping system comprises sliding plates which are arranged in a space layering manner, and the sliding plates which are arranged in a layer-by-layer manner are joined each other from head to end so as to form a channel for mixing and traveling of coal slurry and a flotation agent. The device also comprises a splitting unit, wherein the splitting unit is at least arranged on the discharge end of one layer of sliding plate, and the splitting end of the splitting unit is positioned on the layering surface of dropping paths of low-ash-content coarse granules and high-ash-content fine clay of the coal slurry on the layer of sliding plate. Through a stripping effect of the splitting unit on high-ash-content fine clay and low-ash-content coarse granules, the pollution of the high-ash-content fine clay to floatation fine coal is farthest lightened, the operating efficiency of the classifying dropping-type coal slurry pretreating device is improved, meanwhile, the practical input amount of the flotation agent is also greatly reduced, and the control on the pretreating cost is facilitated.

Description

technical field

[0001] The invention belongs to the field of coal slime powder pretreatment, and in particular relates to a graded drop type coal slurry pretreatment device. Background technique

[0002] Because the buoyancy of coal slime in our country is generally poor, coal slurry pretreatment is an indispensable link in the flotation coal preparation process, and it is a prerequisite for the flotation machine to obtain good technical and economic indicators. The necessity of coal slurry pretreatment mainly includes the following four points: 1) Fully disperse the flotation agent, the flotation agent of coal slime is insoluble or slightly soluble in water, only when it is fully dispersed into a large number of tiny droplets, can the It is evenly mixed into the coal slurry; 2) The dispersed flotation agent is well mixed in the floating coal slurry, and the non-polar oil collector forms a relatively stable oil film on the surface of coal particles with different diameters, ...

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