Internal grading ball mill

Abstract

An inner classified ball mill includes a ball grinding cylinder, which is driven by a transmission device to rotate. One side of the ball grinding cylinder is open. The opening position is equipped with a stator disc, which is fixed on a sliding seat. The stator disc and the ball grinding cylinder form a ball grinding cavity. The sliding seat is installed on a rail seat. A classifier, an adjustable air inlet pipe and a feed screw conveyer are fixed on the stator disc. An impeller of the classifier is arranged in the ball grinding cavity. The present invention can realize the classification of fines in the ball grinding cavity. The over grinding of the materials is reduced. The condition that superfine powder hinders the grinding of crude materials can be avoided. The grinding efficiency is greatly improved. The equipment energy loss is lowered. And the mill has the advantages of simple structure and less occupied area and can be used for the grinding of heat-sensitive materials.

Description

technical field [0001] The invention belongs to the technical field of cylindrical pulverizers, in particular to a ball mill with internal classification function. Background technique [0002] The ball mill is one of the most commonly used crushing equipment in the powder production industry. The existing drum ball mills are usually in two structural forms: the stuffy tank type and the open circuit type. The stuffy tank ball mill is to fill the material to be crushed into the machine and seal it until it is crushed to the required fineness and then unloaded. The disadvantage of this type of machine is that the fine powder produced continuously during the working process will continue to participate in the crushing process, causing the fine powder to be re-grinded and over-grinded, so the efficiency is low and the energy consumption is large, especially in ultra-fine crushing. Ultrafine powder will seriously hinder the continuous crushing of coarse materials and greatly red...

AI Technical Summary

Problems solved by technology

In the working process of this type of machine, there are also phenomena of fine powder hindering the crushing of coarse material and regrinding of fine powder, especially the regrinding material returned after classification has a considerable fineness, which seriously affects the coarse material after entering the cylinder. Crushing, so there are also defects of low production efficiency and high energy consumption

In addition, this model has a long process route, a large floor area, and a large investment in equipment.

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