Combined slurry mixing equipment for difficult to separate fine coal

Abstract

The invention relates to the field of coal slurry pretreatment, in particular to a combined slurry adjustment equipment for difficult-to-separate fine coal. The equipment includes a mixing box and a main shaft. The inner cavity of the mixing box is arranged in sequence from top to bottom with an electric field activation layer, an ultrasonic vibration layer and a turbulent mixing layer; at least a pair of driven shafts are arranged axisymmetrically along the axis of the main shaft; the The driven gears are coaxially arranged on the top shaft ends of the driven shafts; the stirring wheels are arranged at the shaft ends of each driven shaft, and the stirring impellers are arranged at the shaft ends of the main shaft; The air inlet pipe is arranged in the box, and the inlet partition is arranged at the inlet end of the cabinet, and the inlet partition is closed by a tension spring; the outlet partition is arranged at the outlet end of the box, and the discharge partition is closed by a compression spring. export port. This equipment can play a very good conditioning effect on the floating coal slime, especially suitable for the slurry modification and upgrading of difficult-to-float fine-grained coal. It has high working efficiency and the pretreatment process is fast and convenient.

Description

technical field [0001] The invention relates to the field of coal slurry pretreatment, in particular to a combined slurry mixing equipment for difficult-to-separate fine-grained coal for slurry-scaling 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 into the floating coal slurry, ...

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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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