Discharging device for planetary ball grinding mill and discharging control method

Abstract

The invention discloses a discharging control method of a planetary ball grinding mill. The ball grinding mill comprises a single chip micro computer PLC. The single chip micro computer PLC is used for controlling feeding, grinding and discharging. During feeding steps, a feeding device can simultaneously distribute a grinding material to a plurality of planetary grinding cylinders (400) to achieve continuous feeding. During grinding steps, a rotating disc device (300) is of a double-conical platform structure; a grinding cavity (423) is internally provided with a plurality of grinding faces (429) formed by liner plates (425) and bottom plates (426); the bottom plates (426) are provided with gaps (427); the liner plates (425) and / or the bottom plates (426) are provided with protrusions; and grinding material bonding can be prevented, and grinding cavity abrasion and the maintenance cost can be reduced. During the discharging steps, a plurality of first discharging openings (512) are formed in the upper portion of the sealing shell (510); a plurality of second discharging openings (513) are formed in the lower portion of the sealing shell (510); a negative pressure generating unit (520) is arranged to form negative pressure with preset pressure in a discharging space to discharge the grinding material with preset weight from the first discharging openings (512); the grinding material with excessive weight is discharged from the second discharging openings (513) and is conveyed to a feeding device through a circulation channel to be ground again, and therefore further grinding material screening is achieved, and the grinding material with large particle diameter can be ground again.

Description

technical field [0001] The invention relates to the fields of crushing, grinding, mechanical force activation, mechanochemistry and mechanized alloy processing, in particular to a discharge device and a discharge control method of a planetary ball mill capable of realizing continuous discharge. Background technique [0002] The planetary ball mill is symmetrically arranged with a plurality of planetary grinding cylinders centered on the main shaft. When each planetary grinding cylinder revolves around the main shaft, it can also rotate itself. The impact energy of the lift and fall grinds the material down. During the continuous working process, repeated impact crushing and rolling and sliding grinding make the materials with large particles gradually become smaller and become fine powder. Since multiple planetary grinding cylinders work at the same time, the grinding efficiency is very high, but to achieve continuous and industrial production, it is also necessary to ensur...

AI Technical Summary

Problems solved by technology

The existing planetary grinding cylinders cannot realize continuous discharge, and the ground materials cannot be further screened and refined, and the inner wall of the grinding body is prone to wear after the material and the grinding body collide with the machine. Once damaged, the entire grinding machine needs to be replaced. Grinding cylinders, expensive to repair

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