A two-stage ultrafine pulverizer

Abstract

The invention belongs to the technical field of pulverizing equipment, and specifically discloses a two-stage ultrafine pulverizer, comprising a discharge chamber, a pulverization system and an air transport system. A classification system is arranged in the discharge chamber, and a feed pipe is arranged on the pulverization system; It is used for material conveying of the crushing system and the discharge chamber; it is characterized in that the crushing system includes a shunt hood, a coarse crushing device, and a fine crushing device, and the coarse crushing device and the fine crushing device are arranged in sequence along the material movement direction. The invention realizes the requirement that the target particle size can be achieved by the primary crushing process of only one vertical ultrafine pulverizer, which not only improves the crushing efficiency, but also has a good crushing effect on tough materials, and at the same time reduces the traditional secondary crushing. The total energy consumption and total cost of the process have broad application prospects.

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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