CZ283794B6 - Non-ferrous metal rotary magnetic separator - Google Patents

Abstract

This rotating separator which separates non-ferrous metals from communal or industrial wastes consists of a cylinder (1) the surface of which is equipped with permanent magnets or poles excited by a DC current. The cylinder (1) is located eccentrically in the upper space inside the outside thin-walled, non-magnetic, non-conductive cylinder (2). The revolutions of the inside cylinder (1) are several times higher than the revolutions of the outside cylinder (2). The direction of rotation is identical and the axes of both cylinders are parallel and horizontal. The upper part of the outside cylinder (2) is connected to the oscillating channel-type feeder (3) of the sorted material.<IMAGE>

Description

Non-ferrous magnetic rotary separator

Technical field

The invention relates to a rotary magnetic separator of non-ferrous metals which separates non-ferrous metals from municipal or industrial waste.

BACKGROUND OF THE INVENTION

The storage of household and industrial waste has become a global problem. Abroad, there is already a significant shift to the sorting of garbage and the use of as much as possible compost and secondary raw materials. Ferromagnetic metals can be sorted out very easily using conventional magnets. Separation of non-ferrous metals is more difficult. When using linear induction motors, small particles with dimensions below 5 mm cannot be reliably separated. Better results can be achieved with a rotating DC excited anchor, which produces a smooth field pattern without adversely affecting the linear motor grooves and at a high frequency given by the drum rotation speed. This rotating anchor is in the separation device inside the drum, which at the same time forms the transfer point of the short belt conveyor. A disadvantage of this arrangement is the relatively large distance between the excited rotor and the screened material on the conveyor belt. The intensity of the magnetic field and hence the force effects on conductive materials decrease very rapidly with distance.

SUMMARY OF THE INVENTION

This disadvantage is overcome by the rotary magnetic separator according to the invention, characterized in that the inner cylinder is located eccentrically in the upper discharge space inside the outer, thin-walled, non-magnetic, non-conducting cylinder. The speed of the inner cylinder is several times higher than the speed of the outer cylinder, the sense of rotation is the same and the axes of both cylinders are parallel and horizontal. An oscillating trough feeder of sorted material is connected to the upper part of the outer cylinder.

In the arrangement according to the invention, there is less danger of material clusters forming on the feed path, the oscillating movement of the feeder largely compensating for uneven pouring of the sorted material onto the inlet of the device. The outer drum of the sorter is not stressed by the tension of the conveyor belt and may be of less robust construction, thus also reducing the distance between the sorted material and the source of the magnetic field.

Overview of the figure in the drawing

The accompanying drawing shows a structural diagram of a rotary magnetic separator of non-ferrous metals according to the invention.

Examples

The inner cylinder 1 is provided with permanent magnets or direct current driven pole pieces on the surface. The cylinder 1 is located eccentrically in the upper run-off space inside the outer thin-walled, non-magnetic, non-conducting cylinder 2. The speed of the inner cylinder 1 is several times higher than the speed of the outer cylinder 2. The direction of rotation is identical and axes of both cylinders are parallel and horizontal. The oscillating trough feeder 3 of the sorted material is connected to the upper part of the outer cylinder 2.

- 1 GB 283794 B6

When sorting the mixture containing dust and small impurities, a screen can be placed in the bottom part of the vibration feeder 3 to separate them. The metal non-magnetic particles in the mixture are accelerated by the magnetic field and fall into the collecting well at a greater distance from the inner cylinder 1, the non-metallic fraction falls freely vertically from the cylinder, the ferromagnetic parts stick to the drum and fall off at the bottom.

Claims (1)

PATENT CLAIMS Rotary magnetic separator of non-ferrous metals, consisting of an inner cylinder provided with permanent magnets or DC-excited pole pieces on the surface, characterized in that the inner cylinder (1) is located eccentrically in the upper discharge space inside the outer thin-walled, non-magnetic, nonconductive cylinder. 2), wherein the speed of the inner cylinder (1) is several times higher than the speed of the outer cylinder (2), the direction of rotation is the same and the axes of both cylinders are parallel and horizontal, the oscillating trough feeder (3) sorted material.