Graded-discharge sand mill

Abstract

The invention discloses a graded-discharge sand mill. The graded-discharge sand mill comprises a sand mill main body, wherein a fine material discharge port is formed in the lower part of the sand mill main body; a separator is arranged in the sand mill main body; a rotor enters from one end of the sand mill main body, and is fixedly installed in a cavity body of the sand mill main body; the rotoris of a hollow interlayer structure, and composed of an outer rotor interlayer, an inner rotor interlayer and a rod pin installed on the outer surface of the rotor; a coarse material discharge port is formed in the outer rotor interlayer; a charge port is formed in the bottom of the inner rotor interlayer; and the rotor communicates with a material circulation system. According to the graded-discharge sand mill disclosed by the invention, through the design of a graded outlet, graded discharge is performed on the materials, the fine materials which reach a grinding particle size are discharged in one process through the separator, and coarse materials which do not reach the grinding particle size are secondarily grinded; and due to the graded grinding manner, the sand grinding efficiencyis greatly increased, the grinded materials are narrower in particle size distribution, and the grinding effect with higher efficiency and the narrower particle size distribution is realized.

Description

technical field [0001] The invention relates to the technical field of grinding, in particular to a graded discharge sand mill. Background technique [0002] The sand mill is a kind of wet grinding equipment used for grinding materials, which is widely used in paint, ceramic ink, food, medicine and other industrial fields. In recent years, it has been introduced into the synthesis process of lithium-ion battery materials to control the primary particle size of powder materials. At present, the commonly used sand mill types mainly include disc type, eddy current type, pin-pin type, etc. Most of the sand mills used in production are ground through repeated cycles of materials until they reach the grinding particle size. During this process, some have reached the grinding The material with particle size is still put into the sand mill to continue grinding or the material that does not reach the grinding precision is discharged in advance, which leads to a widening of the parti...

AI Technical Summary

Problems solved by technology

At present, the commonly used sand mill types mainly include disc type, eddy current type, pin-pin type, etc. Most of the sand mills used in production are ground through repeated cycles of materials until they reach the grinding particle size. During this process, some have reached the grinding The material with particle size is still put into the sand mill to continue grinding or the material that has not reached the grinding precision is discharged in advance, which leads to a widening of the particle size distribution of the material, and it is difficult to control the peak shape accuracy of the particle size distribution, and the production efficiency is low and the production energy consumption is high.

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