Pretreatment equipment for coal slime before floatation feed

Abstract

The invention relates to pretreatment equipment for coal slime before floatation feed, belongs to the technical field of flotation equipment for the coal slime, and is used for pretreatment of the coal slime before entering flotation equipment for sorting. The pretreatment equipment adopts the technical scheme that a feeding box and a discharging box are respectively arranged on two sides of a cylinder body of a casing; a motor is fixed at the upper part of the casing, and is connected with the upper end of a stirring shaft through a leather belt; a vane wheel is mounted at the lower end of the stirring shaft, a sleeve sleeves the stirring shaft, the upper end of the sleeve is fixedly connected with the casing, and the lower end of the sleeve is connected with a stator; the lower end of a chemical dosing pipe is connected to the wall of the sleeve; the lower end surface of the stator and the upper end surface of the vane wheel are in clearance fit; a false bottom plate is a flat plate, a gap is reserved between the false bottom plate and the bottom plate of the casing, and a plurality of circular holes are uniformly distributed in the plate surface of the false bottom plate. The equipment disclosed by the invention is low in electricity consumption, the service life of the vane wheel is long, the flow state of ore pulp is reasonable, and medicament and the ore pulp are sufficiently mixed during operation; the equipment has the characteristics of high volume utilization rate, large ore pulp treatment quantity, wide particle size treatment ranges and high adaptability to coal properties.

Description

technical field [0001] The invention relates to a slurry pretreatment equipment before the coal slime with a particle size of <0.50 mm enters the coal flotation equipment for sorting, 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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