FR2575674A1 - Magnetic-repulsion separator - Google Patents

Abstract

Sorting system, consisting of a vessel 1, one 2 of the faces of which is provided with an inductor 3 connected to a high-frequency generator 10. A mixture of electrically conducting and non-electrically conducting bodies is tipped into the hopper 5. The path of these bodies passes in front of the inductor which, by the skin effect, repels the conducting bodies, whereas the non- conducting bodies are not deflected. The two paths followed, on the one hand by the conducting bodies, and on the other hand by the non- conducting bodies, thus enable them to be sorted.

Description

DESCRIPTION
The subject of the present invention, as a new industrial product, is a process for sorting a mixture of conductive bodies and non-conductive bodies of electricity.

We already know the sorting methods composed of inductive sensors, controlling valves or bellows of ejection.

These methods have great drawbacks, including in particular an imprecision in sorting, as well as rapid wear of the elements.

The object of the present invention is to remedy these drawbacks and relates to a sorting device based on magnetic repulsion.

By way of nonlimiting example, an embodiment of the invention is described below
Referring to the accompanying drawing, Figure 1 is a perspective view of the system.

In (1) is shown a parallelepiped tank.

On one of the walls (2) is fixed an inductor (3) composed of a copper tube in which circulates cooling water.

The inductor (3) is connected to a generator (10) producing an alternating current in a frequency range around 80 kilohertz.

On the upper part of the tank (1) is located a loading hood (5).

At the bottom of the tank (1) are located two other hoods (6) and (7), intended to collect the sorted elements.

The extraction of these elements once sorted, takes place by the valves (8) and (9).

The tank (1) is filled with water.

The front face of said tank consists of a transparent window.

The system according to the present invention operates as follows
The material to be sorted is introduced into the hood (5), ie crushed bottle glass mixed with aluminum, tin and lead capsules and caps, as well as bottle necks with traces of metal adhering to it.

The hood (5) is arranged so as to channel the flow of materials to be sorted along the vertical wall (2).

The non-conductive elements therefore descend by gravity along the wall (2) and are found in the hood (7).

The conductive elements also descend along the wall (2), but arrived at the level of the inductor (3), their trajectory is deflected under the action of the magnetic repulsion being established between the inductor and the conductive elements d sort; this repulsion is known in physics under the name of the skin effect.

These conductive elements are therefore found in the hood (6).

the tank (1) is filled with water, which has the effect of lightening the bodies which are immersed there, according to the principle of Archimedes.

The sorting system described has many advantages, as well - removal of any detection system, - removal of any mechanical ejection element, - perfect separation, all conductive bodies are removed, - elimination of conductive bodies according to the present
system does not simultaneously eliminate
non-conductive bodies, - elimination of bottlenecks on which part adheres
metallic, thanks to the lightening of the glass by the
principle of Archimedes, - Finally, the fact of operating in a static manner, makes
the present very reliable system and
free from any maintenance.

Many modifications can be made to this 6v6th sorting, so for example - you can fill the tank (1) with more liquids
heavier than water, such as trichlorethylene, mud
or liquids lighter than water, such as oil.

- there may be more than two silos at the bottom of the
tank, to recover the conductive elements according to
their affinity for the skin effect.

- there can be several inductors connected to one or
several generator, the shape of the inductors can
be different than the one shown.

the inductor can be placed between two tanks, so
that each of its faces acts in one and in
the other tank.

- the items to be sorted can be bottles
crushed containing metal capsules.

- the items to be sorted can be batteries
leaded electric grinders, containing lead,
glass fibers and plastics.

Claims (6)

1) System for sorting a mixture of electrically conductive bodies and non-electrically conductive bodies, with a view to separating them, characterized in that said bodies are brought into free fall (11) and that an inductor ( 3) traversed by a high frequency alternating electric current is placed in the vicinity of said trajectory. 2) sorting system according to claim 1), characterized in that the inductor (3) creates an induced current in the electrically conductive bodies (12) which has the effect of subjecting said bodies to an action of repulsion compared to the inductor, an effect known in physics as the skin effect. 3) Sorting system according to the above claims, characterized in that the trajectory of said non-conductive bodies (13) is vertical, according to the principle of universal gravitation, and that the electrically conductive bodies (12) are deflected of their trajectory normally followed according to said principle of universal gravitation, by the inductor (3). 4) Sorting system according to the above claims, characterized in that said trajectories of said electrically conductive bodies (12) and non-electrically conductive (13) each lead to a container (6) and (7) . 5) Sorting system according to the above claims, characterized in that the sorting operations are carried out in a liquid medium or in a gaseous medium. 6) Sorting system according to the above claims, characterized in that the face (2) supporting the inductor (3), is vertical or inclined.