Atomized fall type coal paste preprocessor

Abstract

The invention relates to an atomized fall type coal paste preprocessor. A sliding plate is fixedly connected to the two sides of a lower tank body of a fall tank, a vertical shaft of a fogging disc is connected with an output shaft of an electric motor, an upper tank body of the fall tank is provided with a central feeding pipe and an overflow launder; wherein the overflow launder is internally provided with baffle plates; a slide plate comprises an upper slide plate and a lower slide plate, a ridged bar is fixedly connected on the slide plate; the vertical shaft of the fogging disc is externally sheathed with a sleeve, the lower part of the sleeve is provided with a chemical feed pipe which is communicated with a chemical feed hopper, the lower end of the chemical feed pipe is placed above the front surface of the fogging disk; a coupler is a flexible coupler. In the invention, the front surface of the fogging disk is the working surface; floating agent automatically flows to the working surface under the action of static pressure, thus avoiding blockage caused by impurities; with the fall tank, repeated fall of coal paste is realized, so that sufficient time is provided to contact and fully mix with the floating agent having gong through atomization and dispersion, thus facilitating formation of enough and stable oil film on the surface of the fogging disk; the slide plate with ridged bars is set with different contact pretreatment time for medium-thickness and fine particles of the coal paste, thus creating fine technological conditions for coal paste pretreatment.

Description

technical field [0001] The invention relates to a coal slurry pretreatment device, in particular to an atomizing and dropping type coal slurry pretreatment device. Background technique [0002] The floatability of coal slime (powder) in my country is generally poor, and it is especially necessary to pretreat the floated coal slurry before it enters the flotation machine for sorting. The water-insoluble foaming agent is dispersed into fine oil droplets; the dispersed oil droplets are evenly mixed with the floating coal slurry; the non-polar oil collector forms a relatively stable oil film on the surface of coal particles with different diameters, improving The hydrophobicity of coal particles, in the process of pretreatment, the dispersion of flotation agent and the mixing of flotation agent and coal slurry are particularly important. [0003] At present, the common flotation agent dispersion methods include mechanical dispersion, emulsification dispersion and atomization disp...

AI Technical Summary

Problems solved by technology

Among them, mechanical mixing is to mix the rotating coal slurry and flotation agent, the effect is poor, and the amount of flotation agent is large; the falling type mixing and pipeline mixing, the contact time between the floating coal slurry and the flotation agent is short, the ash content is low, and the particle size is relatively small. Coarse coal particles enter the flotation machine before forming a sufficient stable oil film on the surface, resulting in the loss of some coarse coal particles to the tailing coal

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