Method and device for conducting impact crushing on brittle fine granular layers through pneumatic dielectric spheres

Abstract

The invention provides a fine-grained brittle granular layer impact crushing method and device. The problems that for an existing ball-milling device, the impact force is different in size, the material layer thickness is uncontrollable, steel consumption is high, and the energy utilization rate is low are solved. The device for conducting impact crushing on brittle fine granular layers through pneumatic dielectric spheres comprises a high-frequency reciprocating type cylinder impacting system, a material platform rotary system, a material layer loosening and negative pressure screening system and a material inputting and material layer arrangement system. Accordingly, on the basis of the principle that when the material layer granules are impacted by the dielectric spheres, the crushing efficiency is affected by the dielectric sphere diameters, impact force size, material layer thickness and granule size, by keeping the stable material layer state and accurate dielectric sphere diameter and impact force, the crushing efficiency of single impact of the dielectric spheres on the material layers is improved, and scale production is achieved through high-frequency impact and cylinder close-arrangement, and industrial application is promoted.

Description

technical field [0001] The invention relates to a method and a device for impact crushing a brittle granular material layer in powder processing, in particular to a method and a device for impact crushing a fine particle material layer with a medium ball. Background technique [0002] In the preparation of powder products such as ceramics, cement, minerals, etc., the impact and grinding of brittle particles by medium balls are usually used to achieve pulverization by means of ball mills, vibration mills and other devices. However, the energy utilization rate in the powder processing process is low and the energy consumption is high. Research data show that the energy used for particle crushing by ball milling accounts for less than 5% of the total input energy. The energy utilization rate of the vibration mill is slightly higher, but the mechanical loss is relatively large, and it is difficult to achieve large-scale. The data show that the power consumption for grinding op...

AI Technical Summary

Problems solved by technology

However, limited by the shape of the cylinder, the radial distribution of the dielectric balls is different, and the difference between the throwing and falling points is large, resulting in different impacts of the dielectric balls on the material layer, and there are a large number of weak and ineffective impacts. high consumption

Because the pulverized material is mixed with the medium, the thickness of the material layer is difficult to guarantee, and there are a large number of direct impact and friction between the medium balls, and the steel consumption is large.

[0004] The high-pressure roller mill crushes the particles of the material layer through extrusion. However, due to the large area of ​​action, the particles are easily bonded into cakes after crushing, and it is difficult to obtain products with small particle sizes, and the particle size of particle crushing is limited.

Images