Difficult-to-float fine-grained coal deep slurry modification equipment

Abstract

The invention relates to the field of coal slurry pretreatment, in particular to deep slurry mixing and modifying equipment for fine coal hard to float, and the equipment is used for slurry mixing and modifying of high-ash fine coal slime hard to separate. The equipment comprises a mixing box, drug distributing grooves are formed in the top of a cavity of the mixing box, and an annular distributing unit and an annular ore pulp feeding grooves are sequentially arranged outside the drug distributing groove. An inclined falling plate is arranged below a discharging outlet of the annular distributing unit. A stirring impeller is arranged below the inclined falling plate, and a stator wall is arranged around the impeller. A liquid outlet of the mixing box is located at the bottom end face of the mixing box, and jetting sprayers and a liquid pipeline are arranged on the top end face of the mixing box. The two drug distributing grooves are arranged in parallel and correspond to the jetting sprayers in a one-to-one mode. Mixed liquid outlet ends of the two jetting sprayers stretch into cavities of the corresponding drug distributing grooves. The equipment has a good modifying effect on fed floating coal slime and especially meets the slurry mixing and modifying requirements of the fine coal hard to float, the work efficiency of the equipment is high, and the pretreatment process is quick and convenient.

Description

technical field [0001] The invention relates to the field of coal slurry pretreatment, in particular to a deep slurry-modifying and upgrading equipment for difficult-to-float fine-grained coal, which is used for slurry conditioning and upgrading of high-ash refractory fine-grained coal slime. 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 (non-polar oil collector and foaming agent), the flotation agent of coal slime is insoluble or slightly soluble in water, Only by fully dispersing it into a large number of tiny droplets can it be uniformly mixed into the coal slurry; 2) Mix the dispersed flotation agent well in...

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Problems solved by technology

As a relatively advanced coal slurry pretreatment device in the field, the flotation agent droplets are an order of magnitude smaller than the emulsified and dispersed droplets, and the dispersion effect is better; The dispersing effect of the medicine is achieved by the rotation of the fogging disc, which often requires a closed box to form a closed space to avoid the meaningless drift of the mist medicine, but the formation of the closed environment often causes problems such as fogging The working environment of the disc is poor, so it is easy to send product failures, it is impossible to realize the intuitive observation of the slurry mixing process, and it is difficult to find out the faults in time, which brings troubles to the on-site operation and maintenance work; in addition, the high-speed rotating fogging disc, The requirements for the speed of the drive motor are too high, that is, a secondary motor with a speed of up to 3000 rpm must be used to ensure its working performance, which poses severe challenges to the actual assembly, purchase and maintenance costs.

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