Abstract
It is experimentally shown the possibility of obtaining a finely dispersed powder using mills of non-impact type on the basis of the screw drum. The dependence of grinding the powder to the weight of the load is proved.
Highlights
Hard materials are widely used for the manufacture of sources of permanent magnetic fields, which in some cases are technically and economically more advantageous than DC electromagnets
The efficiency of the destruction of particles in the magneto-vibrating layer depends on the material and the granulometric composition of the original powder, as well as on the induction and the gradient of magnetic field induction
The analysis of the presented dependences shows that the process of powder grinding with loading masses from 100 grams has little effect on the size of the particles obtained, the optimal loading weight for the chosen parameters of the magnetic field and the geometry of the screw drum is a mass of 30-60 grams, which amounts to 30% of the drum loading
Summary
Hard materials are widely used for the manufacture of sources of permanent magnetic fields, which in some cases are technically and economically more advantageous than DC electromagnets. For many technical details it is necessary to have powders with a very small particle size, of about 10-8 m For this purpose, fine grinding is used, which is produced in spherical vibrating, rotating or planetary centrifugal, vortex and hammer mills [1]. A piece of material or the selfgrinding body must have such kinetic energy that it would be enough to overcome the internal bonds between the particles. In such a field of technology as shock disintegration, there can be no final solutions. Modern equipment that implements the centrifugal-impact crushing-grinding method is just another stage in the development of the technique of shock disintegration of solid materials
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