SU1491573A1 - Vibratory mill - Google Patents

Abstract

This invention relates to the grinding of materials by vibratory mills in the chemical, construction and other industries. The goal is to increase the profitability of grinding. The grinding chamber (CD) contains a horizontal grille carrying grinding bodies, a under-grate funnel (PV), a pneumatic discharge box (KP) above the grille with a loading nozzle centrally inserted into it from above and a pneumatic inlet for the PV. KR and PV axially covered by an annular cavity, mating at the bottom with pneumatic inlet, and at the top with the cavity KP. Between the coaxial walls of the annular cavity around the CD, vortex-forming blades are inclined, forming a flow deflector. Particles crushed in KR are poured out from under the lattice into PV, at the exit from which air flows are taken from the pneumatic feed up the annular cavity to the blade m, which swirls the flow in the CS cavity above the RC. The resulting pneumoclassification over the CR is the small fractions discharged through the CP, and the large fractions are returned to the coal in the KR. 1 il.

Description

The invention relates to the grinding of ores, rocks, materials, and specifically to vibratory mills, and can be used in the chemical, mineral processing, food, construction and other industries.

The purpose of the invention is to increase the profitability of grinding.

The drawing shows a schematic diagram of the proposed mill, a longitudinal section.

The chamber 1 of the mill is supported by springs 2 on the base 3 and is equipped with a vibration actuator 4 mainly

vertical oscillations o The horizontal grille 5 of the chamber carries the grinding bodies 6 on top and the funnel 7 on the bottom. Above chamber 1 there is a pneumatic discharge box 8 with a 9-nozzle 9 centrally inserted into it from above, and under the chamber and funnel 7 there is a pneumatic input 10. Chamber 1 and funnel 7 are axially enclosed by an annular cavity 11 mating downwardly with a pneumatic inlet 10, and above with a cavity of a duct 8. Between the coaxial walls of the cavity 11 there is mounted a deflector of the pneumatic flow generated by the pneumatic inlet 10. Deflector vtol4: CO

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not in the form of obliquely mounted, for example, on rotary axes x 12 vortex-forming blades 13, located around chamber 1.

The angle of the blades 13 can be adjustable, and the pneumatic system - pressure or suction.

During the operation of the mill, the material loaded through the pipe 9 (direction arrows) is crushed by grinding bodies 6 on the grid 5 as a result of its oscillations with the chamber 1. The crushed particles from under the grid 5 are transferred into the funnel 7, at the exit from which they are picked up by a pneumatic flow and carry with it up the cavity 11 to the deflector. The twisted blades 13. The flow is centrifugally aerodynamically classified in the cavity of box 8 above chamber 1. At the same time, sufficiently crushed fractions are removed from box 8 for unloading, while relatively large fractions are returned to the chamber for grinding. The ratio of these fractions can be controlled by adjusting the inclination of the blades 13 and (or

air flow speeds. Optimization of the process of pneumocpassification and product selection increases the profitability of grinding.

Claims (1)

Invention Formula A vibratory mill, containing a grinding chamber with a horizontal grille and a under-grate funnel, a pneumatic discharge box above the grille with centrally loaded inlets on top of it, a pneumatic inlet and a pneumatic flow deflector, characterized in that it is axially an annular cavity that covers it and a funnel, and the deflector is made in the form of vortex blades inclined in the latter around the chamber, with the annular cavity adjacent to the bottom of the pneumatic valve ohms, and the top - with a cavity pnevmovygruzki.