System for separating non-magnetizable metals from a mixture of

Details System for separating non-magnetizable metals from a mixture of System for separating non-magnetizable metals from a mixture of

1998-05-28

2000-05-30

Nguyen, Tuan N.

Classifying, separating, and assorting solids

Magnetic

Paramagnetic

209212, 209225, 209228, B03C 100

Patent

active

060681330

DESCRIPTION:

BRIEF SUMMARY
BACKGROUND OF THE INVENTION

The invention relates to a system for separating non-magnetizable metals, in particular nonferrous metals, from a mixture of solids. The main element of the system is an alternating magnetic field generator for deflecting the components of the mixture on parabolic trajectories, followed by at least two spaced apart separating elements.


STATE OF THE ART

A system of this type with the same main elements is known from DE 38 17 003 C1 and DE 00 093 A1 and has proven successful in day to day operations. In order to effectively separate mixtures of solids, the features of DE 38 17 003 C1, where the position of the rotational axis of the magnet rotor in the quadrant of the material release zone is changed for adjusting the effective range of the alternating field generated by the magnet rotor, are advantageously combined with the effect described in DE 00 093 A1, where several different components of a mixture of solids which are conveyed to the alternating field generator, are separated simultaneously in a single pass.
It would be advantageous to provide an improved sorting process of the separable fractions, in particular when the supplied mixtures of solids are quite heterogeneous and have different electromagnetic properties as well as different geometric shapes.


SUMMARY OF THE INVENTION

It is therefore an object of the invention to improve the quality of the separation process in a conventional system by combining several technical means, so that the system operates synergetically during the entire separation process--from the point where the mixture of solids is supplied, via the subsequent conveyor to the release region and separation zones defined by the ejection trajectories--and the various material fractions have a higher purity after separation.
This object is solved by the invention in that: in the transfer region, has a dispersing and acceleration section with an additional slope, so that the conveyed material is uniformly distributed and essentially resting on the conveyor belt, thereby protecting the conveyor belt, conveyor, so that the ratio mass flow/throughput efficiency can be adjusted, the residence time of the mixture of solids in the eddy current field of the magnet rotor can be controlled and the parabolic ejection trajectory of the respective constituent of the mixture of solids can be changed, to change the point where the respective constituent of the mixture of solids is released, over a range of .gtoreq.90.degree.; an eddy current field generates a variable repulsive force which ejects the respective constituent of the mixture of solids away from the head drum in a manner specific for that material, frequency converter and matched to the grain size and the material composition of the mixture of solids, wherein the rate of change of the magnetic field determines the magnetizing times, and adjacent parabolic ejection trajectories of the separated fractions.
The system according to the invention advantageously combines the above features, such as the additional slope of the vibrating channel, the controllable velocity of the conveyor belt, the adjustablility and speed control of the magnet rotor, as well as the addition of a separating station, in the form of a synergistically operating system which is described in greater detail in the embodiments.


BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 schematically, a side view of the system of the invention showing the basic functions,
FIG. 2 schematically, a side view of the head drum of the conveyor belt showing the basic operation of the eccentrically supported magnet rotor,
FIG. 3 a front view of the head drum, and
FIG. 4 a side view according to FIG. 3.


DETAILED DESCRIPTION OF THE INVENTION

The invention will now be discussed with reference to embodiments.
Referring first to FIG. 1, an essential element of the system is a generally inclined vibrating channel 2 for conveying--in the direction of the arrow--the mixture of solids 1 comprising, for example, iron/stainless steel (V2A), 1.1, nonmetals/stainle

REFERENCES:
patent: 4834870 (1989-05-01), Osterberg et al.
patent: 5057210 (1991-10-01), Julius
patent: 5394991 (1995-03-01), Kumagai et al.
patent: 5626233 (1997-05-01), Wells, II
Derwent Abstract corresponding to EP 0 342 330.
Derwent Abstract corresponding to EP 0 550 867.
International Search Report corresponding to PCT/DE 96 01038.
Derwent Abstract corresponding to 0 550 867.

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