Double-stage ultrafine pulverizer

Abstract

The invention belongs to the technical field of pulverizing equipment, and particularly discloses a double-stage ultrafine pulverizer. The double-stage ultrafine pulverizer comprises a discharging chamber, a pulverizing system and an air conveying system. A grading system is arranged in the discharging chamber. A feeding pipe is arranged on the pulverizing system. The air conveying system is usedfor conveying materials of the pulverizing system and the discharging chamber. The double-stage ultrafine pulverizer is characterized in that the pulverizing system comprises a flow separation cover,a coarse pulverizing device and a fine pulverizing device. The coarse pulverizing device and the fine pulverizing device are arranged in sequence in the material movement direction. By the adoption ofthe double-stage ultrafine pulverizer, the purpose that the requirement of the target particle size can be met by the primary pulverizing technology of only one vertical type ultrafine pulverizer isachieved, the pulverizing efficiency is improved, the good pulverizing effect on rough materials can also be achieved, the total energy consumption and the total cost of the conventional secondary pulverizing technology are reduced, and the double-stage ultrafine pulverizer has the broad application prospect.

Description

technical field [0001] The invention relates to the technical field of pulverizing machinery and equipment, in particular to a two-stage superfine pulverizer. Background technique [0002] The material (generally less than 1mm) after primary cleaning, magnetic separation and primary crushing enters the pulverizer from the feeder for crushing. The linear velocity of the edge of the crushing disc can reach 130m / s. Under the action of huge centrifugal force, the material is crushed by the impact of the hammer knife installed on the crushing disc, and then is spun to the surrounding ring gear at a very high speed. Impact smashes. The high-speed airflow passes between the hammer knife and the ring gear, and its pressure changes sharply, forming alternating loads on the material. Under the action of collision shear, the material is split into fine powder. The pulverized material passes through the flow guide of the shunt cover and the convex cover, and then enters the classific...

AI Technical Summary

Problems solved by technology

The secondary crushing process has the disadvantages of high cost of purchasing other equipment, large total energy consumption, large floor area, and is not suitable for small feed mills.

[0004] 1. The pulverization time of the superfine pulverizer is long, the energy consumption is high, and the uniformity of the pulverization particle size is poor;

[0005] 2. Poor crushing effect on coarse fiber materials;

[0006] 3. The hammer knife and ring gear of the ultrafine powder are greatly worn

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