Media-stirring pulverizer of internal classifier type

Abstract

In this media-stirring pulverizer of internal classifier type (10), a stirring member (30) is provided with a rotating cylindrical base (32) extending in the vertical direction within a vessel (22) and capable of rotation, forming an annular pulverization chamber (28) between the outside periphery of the rotating cylindrical base (32) and the inside periphery of the vessel (22). Between a pulverization section (20) and a classification section (50) is situated a circulating mechanism (70) for promoting flow of a carrier gas accompanied by pulverized particles, from the pulverization section (20) to the classification section (50). A descent passage (74) for returning coarse particles from the classification section (50) to the pulverization section (20) is furnished with a pulverization aid addition means (78) for adding a pulverization aid to the coarse particles.

Description

technical field [0001] The invention relates to a built-in pulverizer of a medium agitation type classifier. The medium-stirred classifier built-in pulverizer of the present invention is particularly suitable for crushing pigments, ceramics, metals, inorganic substances, ferrite, carriers for toner, electronic materials, battery materials, gypsum, slag, silicon, glass, etc. Raw materials such as , carbon, etc. are mixed and pulverized with a bead-shaped pulverized or dispersed medium, or dispersed into fine particles and then classified, but not limited thereto. Background technique [0002] As such a medium agitation type classifier-built-in pulverizer, the technique disclosed in JP 2003-265975 A is known. The medium agitation type classifier built-in pulverizer disclosed in this publication is a dry type medium agitation type pulverizer that mixes raw materials and media together with an agitator and then pulverizes them. A crushing chamber with an outlet for flowing gas...

AI Technical Summary

Problems solved by technology

[0003] In such a classifier-built-in pulverizer, secondary air (fluid gas) is required for the pulverized particles pulverized in the stirring part to rise from the stirring part to the classifying part, but the classifier disclosed in the above publication In the built-in type pulverizer, since most of the secondary air flows in from the circumferential blades close to the classifying rotor, the air volume is insufficient.

Or, a large amount of air volume is required to make it sufficient, which affects the classification accuracy

Images