A kind of coal slime flotation feeding pretreatment equipment

Abstract

A coal slime flotation feeding pretreatment device belongs to the technical field of coal slime flotation equipment and is used for pretreatment before coal slime enters the flotation equipment for sorting. The technical solution is: there are feed boxes and discharge boxes on both sides of the shell cylinder, the motor is fixed on the upper part of the shell, the motor is connected with the upper end of the stirring shaft through a belt, and the impeller is installed at the lower end of the stirring shaft , the sleeve is set on the stirring shaft, the upper end of the sleeve is fixedly connected with the housing, the lower end of the sleeve is connected with the stator, the lower end of the dosing pipe is connected with the wall of the sleeve, the lower end of the stator and the upper end of the impeller are clearance fit, The false bottom plate is a flat plate, there is a gap between the false bottom plate and the housing bottom plate, and a plurality of circular holes are evenly distributed on the surface of the false bottom plate. The equipment of the present invention has low power consumption, long service life of the impeller, reasonable pulp flow state, fully mixed chemical agent and pulp during operation, high volume utilization rate, large pulp processing capacity, wide processing particle size range, and strong adaptability to coal quality. features.

Description

technical field [0001] The invention relates to a pulp pretreatment equipment before the coal slime with a particle size of <0.50mm enters the coal flotation equipment for separation, and belongs to the technical field of coal slime flotation equipment. Background technique [0002] At present, the coal slurry pretreatment equipment used in the coal preparation plant mainly includes XY series slurry preprocessor, PS type coal slurry preprocessor, jet type premineralizer and FCA series atomized drop type coal slurry preprocessor, etc. Due to its own structure and scale-up criteria, the XY series slurry preprocessor has insufficient mixing capacity of large equipment, poor mixing effect of coal slurry and chemicals, uneven dispersion of chemicals, and unsatisfactory on-site use effect; PS type coal slurry preprocessor The mixing of chemical agent and coal slurry is achieved by installing a static mixer on the pipeline, but the requirements for emulsified water and flotation...

AI Technical Summary

Problems solved by technology

Due to its own structure and scale-up criteria, the XY series slurry preprocessor has insufficient mixing capacity of large equipment, poor mixing effect of coal slurry and chemicals, uneven dispersion of chemicals, and unsatisfactory on-site use effect; PS type coal slurry preprocessor The mixing of chemical agent and coal slurry is achieved by installing a static mixer on the pipeline, but the requirements for emulsified water and flotation feed are strict. If there are impurities in it, it is easy to cause the nozzle or mixer to be blocked, and it is difficult to remove; The mineralizer is to install several nozzles at a certain angle inside the mineralizer. The speed of the slurry entering the nozzle is lower than the speed of the injection, forming a certain degree of negative pressure, inhaling the agent and air, and realizing the pre-mineralization of the coal slurry. However, due to the production The medium feed pressure is unstable, and the agent is easy to spray out, making it difficult to add and the atomization effect is not ideal; the FCA series atomized drop-type coal slurry preprocessor uses a pneumatic jet atomizer to disperse the agent, and uses a slide plate The structure expands the time difference between coarse and fine particles and chemicals to optimize the process, but external compressed air is needed during use, and the inside of the preprocessor is easily blocked by impurities in the coal slurry, so there are few field applications

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