Theoretical Study of the Material Grinding Process in the Working Chamber of a Disk Mill

Abstract

This article analyzes the movement of material particles in the central and peripheral parts of the working chamber of a disk mill. A diagram of a disk mill and a diagram of the movement of particles in its working chamber are presented. The cutting elements are blades in the shape of a parabola located on the disks having an inclined surface. An expression is found for determining the time when a particle is located inside the grinding chamber of a mill. It is determined that this time depends on the geometric (x1; y1; x2; y2; ) and technological (ω) parameters. The dependence of the time spent on the change in the angle of deviation of the surface of the curved blade from the radial direction is shown in figure 3. As a result of theoretical research, an analytical expression is obtained that allows to determine the particle size at the output of the grinding chamber. According to the found expression, the final particle size at the output of the grinding chamber depends on such parameters as d0, σ, ω, and . As a result, the dependence (figure 4) of the ratio of the initial particle size to the final one ( 0 ) on the time change is constructed. According to the obtained graphs, as the angle increases, the particle time in the grinding chamber decreases, in result of which the final size of the particle at the output increases.