Integrated slurry mixing equipment for difficult-to-float fine coal

Abstract

The invention relates to the field of coal slurry pretreatment, in particular to integrated slurry mixing equipment for difficult-to-float fine coal. The equipment comprises a mixing box, wherein a drive shaft is vertically arranged in an inner cavity of the mixing box, and an electric field activation layer, an ultrasonic wave shocking layer and a forced stirring layer are sequentially arranged in the inner cavity of the mixing box from top to bottom in the length direction of the drive shaft. The equipment further comprises a pressurized gas dissolving box, an air inlet pipe used for introducing high-pressure air is arranged in a box body of the pressurized gas dissolving box, and a feeding partition board used for realizing opening and closing of an inlet end is arranged at an inlet end, used for being communicated with a discharge port of the mixing box, of the box body and is fastened through an extension spring and butted against the inlet end to close the inlet end; an outlet end of the box body is connected with a floatation machine, and a discharging partition board used for realizing opening and closing of the position is arranged at the outlet end, is tensioned through a compression spring and closes the outlet end. The equipment has a good conditioning function on floated coal mud, particularly meets the slurry mixing and conditioning demands of the difficult-to-float fine coal, has high working efficiency and rapidly and conveniently performs pretreatment.

Description

technical field [0001] The invention relates to the field of coal slurry pretreatment, in particular to an integrated refractory fine coal slurry conditioning equipment 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 into the floating coal slurry, and the no...

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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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