Ultrafine powder electrostatic classification device

Abstract

Disclosed is a superfine powder electrostatic grading device, comprising a feeding part of the powder, an electrostatic dispersion part, an grading part, a product collector, a high voltage electrostatic power supply and an electrostatic power supply. The feeding part includes a charging barrel which is equipped with a vibrating motor and a switch. The electrostatic dispersion part is a barrel-shape structure with insulating material, and the electrodes used to electrify the powder are evenly distributed on the wall of the barrel; the charging barrel is inserted in the dispersion barrel. The circumambience of the dispersion barrel is connected with electrodes; the bottom of the dispersion barrel is shrunk; the electrostatic grading part is composed of a square grading chamber and two opposite electrostatic electrodes, the bottom of the dispersion barrel is inserted in the square grading chamber; the electrostatic electrodes are wire meshes or metal sheets on the two opposite whole surfaces of the grading chamber; the product collector is arranged on the bottom of the grading part. The invention has the advantages that the invention is suitable for the grading of the superfine powder with high grading rate, simple structure, convenient and closed operation; and has no environmental pollution.

Description

technical field The invention relates to an ultrafine powder classifying device, in particular to an ultrafine powder electrostatic classifying device. Background technique Powder, especially ultra-fine powder, has been more and more widely used in various industries of the national economy. With the expansion of the application range of powder, the requirements for powder are getting higher and higher. The finer the powder particles, the narrower the particle size distribution of the powder, the wider its application range, and the better its performance after being applied to products. For example, when making lithium cobalt oxide powder for lithium batteries, the particle size range of the powder is required to be between 7-9 microns. Such products produce lithium batteries with excellent performance, large battery capacity, and long battery life. This requires strict control of the particle size of the powder during the preparation of lithium cobaltate powder, and the f...

AI Technical Summary

Problems solved by technology

However, when the particle size of the powder becomes finer, the specific surface area of ​​a single particle increases, and agglomeration easily occurs between particles. into the crude product in the form of coarse particles

This reduces the accuracy and efficiency of classification and affects the effect of classification

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