[go: up one dir, main page]

EP0339195B1 - Magnetic separator - Google Patents

Magnetic separator Download PDF

Info

Publication number
EP0339195B1
EP0339195B1 EP89102517A EP89102517A EP0339195B1 EP 0339195 B1 EP0339195 B1 EP 0339195B1 EP 89102517 A EP89102517 A EP 89102517A EP 89102517 A EP89102517 A EP 89102517A EP 0339195 B1 EP0339195 B1 EP 0339195B1
Authority
EP
European Patent Office
Prior art keywords
belt drum
belt
drum
magnet system
conveyor belt
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP89102517A
Other languages
German (de)
French (fr)
Other versions
EP0339195A3 (en
EP0339195A2 (en
Inventor
Klaus Dipl.-Ing. Feistner
Gerd Fassbender
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Steinert Elektromagnetbau GmbH
Original Assignee
Steinert Elektromagnetbau GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Steinert Elektromagnetbau GmbH filed Critical Steinert Elektromagnetbau GmbH
Priority to AT89102517T priority Critical patent/ATE91090T1/en
Publication of EP0339195A2 publication Critical patent/EP0339195A2/en
Publication of EP0339195A3 publication Critical patent/EP0339195A3/en
Application granted granted Critical
Publication of EP0339195B1 publication Critical patent/EP0339195B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C1/00—Magnetic separation
    • B03C1/02—Magnetic separation acting directly on the substance being separated
    • B03C1/23—Magnetic separation acting directly on the substance being separated with material carried by oscillating fields; with material carried by travelling fields, e.g. generated by stationary magnetic coils; Eddy-current separators, e.g. sliding ramp
    • B03C1/24—Magnetic separation acting directly on the substance being separated with material carried by oscillating fields; with material carried by travelling fields, e.g. generated by stationary magnetic coils; Eddy-current separators, e.g. sliding ramp with material carried by travelling fields
    • B03C1/247—Magnetic separation acting directly on the substance being separated with material carried by oscillating fields; with material carried by travelling fields, e.g. generated by stationary magnetic coils; Eddy-current separators, e.g. sliding ramp with material carried by travelling fields obtained by a rotating magnetic drum
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C2201/00—Details of magnetic or electrostatic separation
    • B03C2201/20—Magnetic separation of bulk or dry particles in mixtures

Definitions

  • the invention relates to a magnetic separator with a conveyor belt guided over a belt drum made of non-electrically conductive material for the transport of a fraction to be sorted from more or less highly electrically conductive particles, with a magnet system rotatably driven in the belt drum at a higher rotational speed than that of the belt drum and with a collecting container for the separated electrically conductive particles arranged in the material discharge zone of the belt drum.
  • a magnetic system arranged in a drum rotates within the belt drum at a speed of approximately 1500 rpm, while the conveyor belt carries the fraction to be sorted at a speed of 1 m / sec to 1.5 m / sec of the belt drum and thus feeds the magnet system.
  • the drum in which the magnet system is arranged has an outer diameter which corresponds approximately to the inner diameter of the belt drum, and a small, constant air gap is formed between the magnet system and the belt drum.
  • a ferromagnetic particle can get between the conveyor belt and its belt drum. It is also possible that such a particle can get through a wear point in a conveyor belt between the belt drum and the conveyor belt. These ferromagnetic particles are held in place by the magnetic force and circulate on the belt drum.
  • the belt drum In order not to impair the effect of the magnet system, the belt drum must be made of non-conductive material. As a rule, the belt drum of such a system is made of plastic. However, this plastic material will already melt at relatively low temperatures.
  • a magnetizable electrically conductive particle, i.e. Iron particles, which have settled between the conveyor belt and the belt drum, are warmed up so strongly by the alternating magnetic field of the magnet system that they begin to glow.
  • the particle can work its way through the plastic of the belt drum and enters the air gap between the outer surface of the magnet system and the inner surface of the belt drum.
  • the device may then be severely damaged under certain circumstances, since the rapidly rotating magnetic system takes the iron particles with it and, for example, slits the belt drum jacket. This entails a system shutdown and an expensive repair.
  • a magnetic separator drum is known (JP-A-57119856), in which the fraction to be sorted is placed directly on the drum jacket, within which a rotating magnet system is arranged eccentrically.
  • JP-A-57119856 a magnetic separator drum
  • small iron particles are held on the drum in the vicinity of the rotating magnet system and warmed up strongly so that they start to glow because there is no conveyor belt that could take such particles with them.
  • the invention is based on the object of designing a generic magnetic separator in such a way that damage to the belt drum caused by particles passing between the conveyor belt and belt drum is avoided.
  • an iron particle gets between the belt drum and the belt, it is clamped between the belt drum and the belt and thereby initially guided past the rapidly rotating magnet system, but it cannot be held by it, but it is forced to rotate Belt drum placed at a greater distance from the magnet system.
  • the influence of the magnetic lines of force on the iron particle is so small that it either gets stuck on the belt drum or falls on the lower run of the conveyor belt.
  • the magnet system can be pivoted about the central axis of the belt drum, so that the relative position between the magnet system and the belt drum can be adjusted with simple means and, for example, maintenance work can be facilitated.
  • the belt drum Preferably, are arranged on the outside of the belt drum between the upper and lower run of the conveyor belt and / or on the inside of the lower run of the conveyor belt in the direction of rotation of the belt drum behind this scraper, so that iron particles passing between the conveyor belt and the belt drum from the belt drum or the lower run of the Conveyor belt can be stripped and derived. This prevents damage to the belt drum caused by the trapped iron particles.
  • the diameter of the magnet system is preferably approximately half the diameter of the belt drum, so that the magnet system can be pivoted through 360 ° around the central axis of the belt drum.
  • the magnet system can consist of permanent or electromagnets.
  • the figure shows a conveyor belt 10 which is guided over a belt drum 12.
  • a fraction of more or less electrically conductive particles 16 is arranged, which are transported at a speed of about 1 m / sec to 1.5 m / sec in the direction of arrow 18 on the conveyor belt 10.
  • the belt drum 12 consists of electrically non-conductive material, for example a plastic material.
  • the cylinder drum 24 of the magnet system 20 has approximately half the diameter of the belt drum 12.
  • the central axis 26 of the cylinder drum 24 is arranged eccentrically to the central axis 28 of the belt drum 12.
  • the cylinder drum 24 can be pivoted with the magnets 22 by means of arms 30 about the central axis 28 of the belt drum 12.
  • the magnet system 20 is arranged in the position shown in the figure in order to optimally separate particles which are good electrical conductors from particles which are less electrically conductive.
  • the magnet system 20 rotates around the center point 26 at a speed of approximately 25 s ⁇ 1 (1500 rpm).
  • a container 32 In front of the belt drum 12 there is a container 32 into which the highly electrically conductive particles 34 fall.
  • the magnetic lines of force of the magnet system 20 cut through the belt drum 12 and the conveyor belt 10 and the electrically conductive particles 16 indicated on the conveyor belt.
  • currents are induced in the electrically conductive particles, which are higher in the case of well electrically conductive particles than less conductive particles.
  • the particles with good electrical conductivity are then accelerated onto a throwing path, which is indicated by the arrow 36. The less conductive particles remain near the conveyor belt and fall down between it and the container 32.
  • An air gap 38 is formed between the outer surface of the cylinder drum 24 of the magnet system 20 and the inner surface of the belt drum 12, which air gap 38 changes continuously due to the eccentric arrangement of the magnet system 20 in the belt drum 12.
  • a wiper 40 and a collecting container 42 underneath are arranged on the outer surface of the belt drum 12 opposite to the magnet system 20 arranged in the belt drum 12.
  • Another scraper 44 is provided on the inner surface of the lower run 46 of the conveyor belt 10.
  • an iron particle 48 gets between the inside of the conveyor belt 10 and the outside of the drum 12, a current is induced in it by the action of the magnetic lines of force of the magnetic field 20 and the iron particle 48 becomes due to the high speed of rotation of the magnet system 20 entrained on the outer surface of the belt drum 12 until after sufficient rotation of the belt drum 12 the distance of the iron particle 48 arranged on the outer surface to the magnet system 20 becomes so great that the magnetic lines of force lose their influence on the iron particle 48. If the iron particle 48 remains stuck to the belt drum 12, it can be stripped off by the scraper 40 and released into the collecting container 42.
  • the particle falls beforehand from the outer surface of the belt drum 12 onto the lower strand 46, it will become from the scraper 44 removed from the space between the upper and lower run of the conveyor belt 10.
  • the eccentric arrangement of the magnet system 20 in the belt drum 12 and due to the smaller diameter of the magnet system 20 prevent an iron particle 48 between the belt drum 12 and the conveyor belt 10 from being entrained by the magnet system at a higher speed than the belt drum 12, so that since the iron particle 48 does not undergo very great heating due to the influence of the magnet system 20, damage to the belt drum 12, that is to say, for example, a slitting thereof by the iron particle 48 is excluded.

Landscapes

  • Electrostatic Separation (AREA)
  • Non-Mechanical Conveyors (AREA)

Description

Die Erfindung betrifft einen Magnetscheider mit einem über eine Gurttrommel aus nicht elektrisch leitendem Material geführten Förderband für den Transport einer zu sortierenden Fraktion aus mehr oder weniger gut elektrisch leitenden Teilchen, mit einem in der Gurttrommel mit höherer Drehgeschwindigkeit als die der Gurttrommel drehbar angetriebenen Magnetsystem und mit einem in der Material-Abwurfzone der Gurttrommel angeordnetem Sammelbehälter für die abgeschiedenen elektrisch leitenden Teilchen.The invention relates to a magnetic separator with a conveyor belt guided over a belt drum made of non-electrically conductive material for the transport of a fraction to be sorted from more or less highly electrically conductive particles, with a magnet system rotatably driven in the belt drum at a higher rotational speed than that of the belt drum and with a collecting container for the separated electrically conductive particles arranged in the material discharge zone of the belt drum.

Ein derartiger Magnetscheider ist bereits aus der US-A-3 448 857 bekannt.Such a magnetic separator is already known from US-A-3 448 857.

Bei der bekannten Vorrichtung rotiert ein in einer Trommel angeordnetes Magnetsystem innerhalb der Gurttrommel mit einer Geschwindigkeit von etwa 1500 U/min, während das Förderband die zu sortierende Fraktion mit einer Geschwindigkeit von 1 m/sec bis 1,5 m/sec der Gurttrommel und damit dem Magnetsystem zuführt. Die Trommel, in welcher das Magnetsystem angeordnet ist, weist einen Außendurchmesser auf, der in etwa dem Innendurchmesser der Gurttrommel entspricht, und zwischen Magnetsystem und Gurttrommel ist ein geringer konstanter Luftspalt ausgebildet. Während des Betriebs entsteht eine Relativbewegung zwischen dem Förderband und der Trommel, in welchem das Magnetsystem aufgenommen ist und dieser Geschwindigkeitsunterschied bewirkt, daß die magnetischen Kraftlinien durch die auf dem Förderband zugeführten elektrisch leitenden Teilchen schneiden, wodurch Ströme induziert werden, deren Größe von der elektrischen Leitfähigkeit der Teilchen abhängig ist. In den Teilchen mit größerer elektrischer Leitfähigkeit wird dabei ein höherer Strom erzeugt, welcher bewirkt, daß diese Teilchen einer Wurfbahn in den vor der Gurttrommel angeordneten Sammelbehälter folgen. Die Teilchen mit geringerer elektrischer Leitfähigkeit dagegen bleiben in Nähe des Förderbandes und fallen kurz vor dem Sammelbehälter von dem Förderband herab.In the known device, a magnetic system arranged in a drum rotates within the belt drum at a speed of approximately 1500 rpm, while the conveyor belt carries the fraction to be sorted at a speed of 1 m / sec to 1.5 m / sec of the belt drum and thus feeds the magnet system. The drum in which the magnet system is arranged has an outer diameter which corresponds approximately to the inner diameter of the belt drum, and a small, constant air gap is formed between the magnet system and the belt drum. During operation there is a relative movement between the conveyor belt and the drum in which the magnet system is housed and this difference in speed causes the magnetic lines of force to cut through the electrically conductive particles fed on the conveyor belt, thereby inducing currents the size of which is related to the electrical conductivity the particle is dependent. A higher current is generated in the particles with greater electrical conductivity, which causes these particles to follow a throwing path into the collecting container arranged in front of the belt drum. The particles with lower electrical conductivity, however, remain in the vicinity of the conveyor belt and fall off the conveyor belt shortly before the collecting container.

Trotz großer Vorsichtsmaßnahmen kann es geschehen, daß ein ferromagnetisches Teilchen zwischen das Förderband und dessen Gurttrommel gelangen kann. Auch ist es möglich, daß ein derartiges Teilchen durch eine Verschleißstelle in einem Förderband zwischen die Gurttrommel und das Förderband geraten kann. Diese ferromagnetischen Teilchen werden durch die Magnetkraft festgehalten und laufen auf der Gurttrommel um. Um die Wirkung des Magnetsystems nicht zu beeinträchtigen, muß die Gurttrommel aus nicht leitendem Material bestehen. In der Regel besteht die Gurttrommel eines derartigen Systems aus Kunststoff. Dieses Kunststoffmaterial wird aber bereits bei relativ geringen Temperaturen schmelzen. Ein magnetisierbares elektrisch leitendes Teilchen, d.h. Eisenteilchen, das sich zwischen Förderband und Gurttrommel festgesetzt hat, wird von dem magnetischen Wechselfeld des Magnetsystems derart stark aufgewärmt, daß es zu glühen beginnt. In diesem Zustand kann sich das Teilchen durch den Kunststoff der Gurttrommel durcharbeiten und gelangt in den Luftspalt zwischen der Außenfläche des Magnetsystems und der Innenfläche der Gurttrommel. Dabei kann es dann unter Umständen zu starken Beschädigungen der Vorrichtung kommen, da das schnell drehende Magentsystem das Eisenteilchen mitnimmt und beispielsweise den Gurttrommelmantel aufschlitzt. Dies zieht eine Stillegung des Systems und eine teure Reparatur mit sich.Despite great precautions, it can happen that a ferromagnetic particle can get between the conveyor belt and its belt drum. It is also possible that such a particle can get through a wear point in a conveyor belt between the belt drum and the conveyor belt. These ferromagnetic particles are held in place by the magnetic force and circulate on the belt drum. In order not to impair the effect of the magnet system, the belt drum must be made of non-conductive material. As a rule, the belt drum of such a system is made of plastic. However, this plastic material will already melt at relatively low temperatures. A magnetizable electrically conductive particle, i.e. Iron particles, which have settled between the conveyor belt and the belt drum, are warmed up so strongly by the alternating magnetic field of the magnet system that they begin to glow. In this state, the particle can work its way through the plastic of the belt drum and enters the air gap between the outer surface of the magnet system and the inner surface of the belt drum. The device may then be severely damaged under certain circumstances, since the rapidly rotating magnetic system takes the iron particles with it and, for example, slits the belt drum jacket. This entails a system shutdown and an expensive repair.

Außerdem ist eine Magnetscheidertrommel bekannt (JP-A-57119856), bei der die zu sortierende Fraktion direkt auf den Trommelmantel aufgegeben wird, innerhalb dessen ein rotierendes Magnetsystem exzentrisch angeordnet ist. In der Praxis hat sich gezeigt, daß kleine Eisenteilchen auf der Trommel in der Nähe des rotierenden Magnetsystems gehalten und stark aufgewärmt werden, so daß sie zu glühen beginnen, da kein Förderband vorhanden ist, das solche Teilchen mitnehmen könnte.In addition, a magnetic separator drum is known (JP-A-57119856), in which the fraction to be sorted is placed directly on the drum jacket, within which a rotating magnet system is arranged eccentrically. In practice it has been found that small iron particles are held on the drum in the vicinity of the rotating magnet system and warmed up strongly so that they start to glow because there is no conveyor belt that could take such particles with them.

Der Erfindung liegt die Aufgabe Zugrunde, einen gattungsgemäßen Magnetscheider derart auszubilden, daß Beschädigungen der Gurttrommel durch zwischen das Förderband und Gurttrommel gelangende Teilchen vermieden werden.The invention is based on the object of designing a generic magnetic separator in such a way that damage to the belt drum caused by particles passing between the conveyor belt and belt drum is avoided.

Diese Aufgabe wird erfindungsgemäß gelöst durch einen Magnetscheider gemäß Anspruch 1.This object is achieved according to the invention by a magnetic separator according to claim 1.

Wenn bei dem erfindungsgemäßen Permanentmagnetscheider ein Eisenteilchen zwischen Gurttrommel und Gurt gelangt, wird es zwischen der Gurttrommel und dem Gurt eingeklemmt und dadurch zwar zunächst an dem schnell drehenden Magnetsystem vorbeigeführt, jedoch kann es von diesem nicht festgehalten werden, sondern es wird zwangsweise bei der Rotation der Gurttrommel in größeren Abstand zu dem Magnetsystem gebracht. Dabei wird der Einfluß der magnetischen Kraftlinien auf das Eisenteilchen so gering, daß es entweder an der Gurttrommel hängenbleibt oder auf das Untertrum des Förderbandes fällt.If, in the permanent magnetic separator according to the invention, an iron particle gets between the belt drum and the belt, it is clamped between the belt drum and the belt and thereby initially guided past the rapidly rotating magnet system, but it cannot be held by it, but it is forced to rotate Belt drum placed at a greater distance from the magnet system. The influence of the magnetic lines of force on the iron particle is so small that it either gets stuck on the belt drum or falls on the lower run of the conveyor belt.

Erfindungsgemäß ist das Magnetsystem um die Mittelachse der Gurttrommel verschwenkbar, so daß die Relativlage zwischen Magnetsystem und Gurttrommel mit einfachen Mitteln eingestellt werden kann und beispielsweise Wartungsarbeiten erleichtert werden können.According to the invention, the magnet system can be pivoted about the central axis of the belt drum, so that the relative position between the magnet system and the belt drum can be adjusted with simple means and, for example, maintenance work can be facilitated.

Vorzugsweise sind an der Außenseite der Gurttrommel zwischen Ober- und Untertrum des Förderbandes und/oder an der Innenseite des Untertrums des Förderbandes in Rotationsrichtung der Gurttrommel hinter dieser Abstreifer angeordnet, so daß zwischen das Förderband und die Gurttrommel gelangende Eisenteilchen von der Gurttrommel oder dem Untertrum des Förderbandes abgestreift und abgeleitet werden können. Damit wird eine Beschädigung der Gurttrommel durch das eingeschlossene Eisenteilchen ausgeschaltet.Preferably, are arranged on the outside of the belt drum between the upper and lower run of the conveyor belt and / or on the inside of the lower run of the conveyor belt in the direction of rotation of the belt drum behind this scraper, so that iron particles passing between the conveyor belt and the belt drum from the belt drum or the lower run of the Conveyor belt can be stripped and derived. This prevents damage to the belt drum caused by the trapped iron particles.

Vorzugsweise ist der Durchmesser des Magnetsystems etwa halb so groß wie der Durchmesser der Gurttrommel, so daß das Magnetsystem um 360° um die Mittelachse der Gurttrommel verschwenkt werden kann.The diameter of the magnet system is preferably approximately half the diameter of the belt drum, so that the magnet system can be pivoted through 360 ° around the central axis of the belt drum.

Das Magnetsystem kann aus Permanent- oder Elektromagneten bestehen.The magnet system can consist of permanent or electromagnets.

Ein Ausführungsbeispiel der Erfindung wird nachstehend anhand der Zeichnung näher erläutert.An embodiment of the invention is explained below with reference to the drawing.

Die Figur zeigt ein Förderband 10, das über eine Gurttrommel 12 geführt wird. Auf dem Obertrum 14 des Förderbandes 10 ist eine Fraktion aus mehr oder weniger elektrisch leitenden Teilchen 16 angeordnet, die mit einer Geschwindigkeit von etwa 1 m/sec bis 1,5 m/sec in Richtung des Pfeiles 18 auf dem Förderband 10 transportiert werden. Die Gurttrommel 12 besteht aus elektrisch nicht leitendem Material, beispielsweise einem Kunststoffmaterial.The figure shows a conveyor belt 10 which is guided over a belt drum 12. On the upper run 14 of the conveyor belt 10, a fraction of more or less electrically conductive particles 16 is arranged, which are transported at a speed of about 1 m / sec to 1.5 m / sec in the direction of arrow 18 on the conveyor belt 10. The belt drum 12 consists of electrically non-conductive material, for example a plastic material.

Innerhalb der Gurttrommel 12 ist ein Magnetsystem 20 mit Permanentmagneten oder Elektromagneten 22 angeordnet, die in einer Zylindertrommel 24 vorgesehen sind. Die Zylindertrommel 24 des Magnetsystems 20 weist etwa den halben Durchmesser der Gurttrommel 12 auf. Die Mittelachse 26 der Zylindertrommel 24 ist exzentrisch zu der Mittelachse 28 der Gurttrommel 12 angeordnet. Die Zylindertrommel 24 ist mit den Magneten 22 mittels Armen 30 um die Mittelachse 28 der Gurttrommel 12 schwenkbar. Zur optimalen Trennung von gut elektrisch leitenden Teilchen von weniger gut elektrisch leitenden Teilchen ist das Magnetsystem 20 in der in der Figur gezeigten Stellung angeordnet. Das Magnetsystem 20 rotiert um den Mittelpunkt 26 mit einer Geschwindigkeit von etwa 25 s⁻¹ (1500 U/min).A magnet system 20 with permanent magnets or electromagnets 22, which are provided in a cylinder drum 24, is arranged within the belt drum 12. The cylinder drum 24 of the magnet system 20 has approximately half the diameter of the belt drum 12. The central axis 26 of the cylinder drum 24 is arranged eccentrically to the central axis 28 of the belt drum 12. The cylinder drum 24 can be pivoted with the magnets 22 by means of arms 30 about the central axis 28 of the belt drum 12. The magnet system 20 is arranged in the position shown in the figure in order to optimally separate particles which are good electrical conductors from particles which are less electrically conductive. The magnet system 20 rotates around the center point 26 at a speed of approximately 25 s⁻¹ (1500 rpm).

Vor der Gurttrommel 12 ist ein Behälter 32 angeordnet, in welchen die gut elektrisch leitenden Teilchen 34 hineinfallen. Während des Transports auf dem Förderband 10 schneiden die magnetischen Kraftlinien des Magnetsystems 20 durch die Gurttrommel 12 und das Förderband 10 und die auf dem Förderband angeführten elektrisch leitenden Teilchen 16. Dabei werden in den elektrisch leitenden Teilchen Ströme induziert, die bei gut elektrisch leitenden Teilchen höher sind als bei weniger gut elektrisch leitenden Teilchen. Die gut elektrisch leitenden Teilchen werden dann auf eine Wurfbahn beschleunigt, die durch den Pfeil 36 angedeutet ist. Die weniger gut leitenden Teilchen bleiben in Nähe des Förderbandes und fallen zwischen diesem und dem Behälter 32 nach unten. Zwischen der Außenfläche der Zylindertrommel 24 des Magnetsystems 20 und der Innenfläche des Gurttrommel 12 ist ein Luftspalt 38 ausgebildet, der infolge der exzentrischen Anordnung des Magnetsystems 20 in der Gurttrommel 12 sich stetig verändert. An der Außenfläche der Gurttrommel 12 gegenüberliegend zu dem in der Gurttrommel 12 angeordneten Magnetsystem 20 sind ein Abstreifer 40 und ein darunter liegender Auffangbehälter 42 angeordnet. Ein weiterer Abstreifer 44 ist auf der Innenfläche des Untertrums 46 des Förderbandes 10 vorgesehen.In front of the belt drum 12 there is a container 32 into which the highly electrically conductive particles 34 fall. During transport on the conveyor belt 10, the magnetic lines of force of the magnet system 20 cut through the belt drum 12 and the conveyor belt 10 and the electrically conductive particles 16 indicated on the conveyor belt. In this way, currents are induced in the electrically conductive particles, which are higher in the case of well electrically conductive particles than less conductive particles. The particles with good electrical conductivity are then accelerated onto a throwing path, which is indicated by the arrow 36. The less conductive particles remain near the conveyor belt and fall down between it and the container 32. An air gap 38 is formed between the outer surface of the cylinder drum 24 of the magnet system 20 and the inner surface of the belt drum 12, which air gap 38 changes continuously due to the eccentric arrangement of the magnet system 20 in the belt drum 12. On the outer surface of the belt drum 12 opposite to the magnet system 20 arranged in the belt drum 12, a wiper 40 and a collecting container 42 underneath are arranged. Another scraper 44 is provided on the inner surface of the lower run 46 of the conveyor belt 10.

Wenn aus irgendeinem nicht vorhersehbaren und ungewollten Grund ein Eisenteilchen 48 zwischen die Innenseite des Förderbandes 10 und die Außenseite der Trommel 12 gelangt, wird in diesem durch Einwirkung der magnetischen Kraftlinien des Magnetfeldes 20 ein Strom induziert und das Eisenteilchen 48 wird infolge der hohen Drehgeschwindigkeit des Magnetsystems 20 auf der Außenfläche der Gurttrommel 12 mitgerissen, bis nach ausreichender Drehung der Gurttrommel 12 der Abstand des auf der Außenfläche angeordneten Eisenteilchens 48 zu dem Magnetsystem 20 so groß wird, daß die magnetischen Kraftlinien ihren Einfluß auf das Eisenteilchen 48 verlieren. Sollte das Eisenteilchen 48 weiter an der Gurttrommel 12 haften bleiben, so kann es durch den Abstreifer 40 abgestreift und in den Auffangbehälter 42 abgegeben werden. Sollte das Teilchen vorher von der Außenfläche der Gurttrommel 12 auf das Untertrum 46 herabfallen, so wird es von dem Abstreifer 44 aus dem Raum zwischen Ober- und Untertrum des Förderbandes 10 entfernt. Durch die exzentrische Anordnung des Magnetsystems 20 in der Gurttrommel 12 und infolge des geringeren Durchmessers des Magnetsystems 20 wird verhindert, daß ein zwischen Gurttrommel 12 und Förderband 10 gelangendes Eisenteilchen 48 mit einer zu der Gurttrommel 12 höheren Geschwindigkeit von dem Magnetsystem mitgerissen wird, so daß, da das Eisenteilchen 48 durch Einfluß des Magnetsystems 20 keine sehr große Erwärmung erleidet, eine Beschädigung der Gurttrommel 12, d.h. beispielsweise ein Aufschlitzen dieser durch das Eisenteilchen 48 ausgeschlossen wird.If for some unpredictable and unwanted reason an iron particle 48 gets between the inside of the conveyor belt 10 and the outside of the drum 12, a current is induced in it by the action of the magnetic lines of force of the magnetic field 20 and the iron particle 48 becomes due to the high speed of rotation of the magnet system 20 entrained on the outer surface of the belt drum 12 until after sufficient rotation of the belt drum 12 the distance of the iron particle 48 arranged on the outer surface to the magnet system 20 becomes so great that the magnetic lines of force lose their influence on the iron particle 48. If the iron particle 48 remains stuck to the belt drum 12, it can be stripped off by the scraper 40 and released into the collecting container 42. If the particle falls beforehand from the outer surface of the belt drum 12 onto the lower strand 46, it will become from the scraper 44 removed from the space between the upper and lower run of the conveyor belt 10. The eccentric arrangement of the magnet system 20 in the belt drum 12 and due to the smaller diameter of the magnet system 20 prevent an iron particle 48 between the belt drum 12 and the conveyor belt 10 from being entrained by the magnet system at a higher speed than the belt drum 12, so that since the iron particle 48 does not undergo very great heating due to the influence of the magnet system 20, damage to the belt drum 12, that is to say, for example, a slitting thereof by the iron particle 48 is excluded.

Claims (4)

  1. A magnetic separator, having a conveyor belt (10) guided over a belt drum (12) of electrically nonconductive material for the transport of the fraction to be sorted which consists of particles (16, 34) of more or less good electrical conductivity, and having a magnet system (20) inside the belt drum (12) which can be driven in rotation at a speed higher than that of the belt drum (12) and with a collecting container (32) arranged in the material discharge area of the belt drum (12) for the electrically conductive particles (34) separated out, characterized by the fact that the outside diameter of the magnet system (20) is substantially less than the clear inside diameter of the belt drum (12), that the magnet system (20) is arranged eccentrically in the belt drum (12) and that the magnet system (20) is arranged for swinging around the center line (28) of the belt drum (12).
  2. A magnetic separator according to Claim 1, characterized by the fact that the diameter of the magnet system (20) is about half as large as the diameter of the belt drum (12).
  3. A magnetic separator according to Claim 1 or 2, characterized by the fact that scrapers (40, 44) are arranged outside of the belt drum (12) between an upper course (14) and a lower course (46) of the conveyor belt (10) and/or on the inside of the lower course (46) of the conveyor belt (10) in rotational direction behind the belt drum (12).
  4. A magnetic separator according to any of Claims 1 to 3, characterized by the fact that the magnet system (20) consists of permanent magnets or electromagnets.
EP89102517A 1988-04-25 1989-02-14 Magnetic separator Expired - Lifetime EP0339195B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT89102517T ATE91090T1 (en) 1988-04-25 1989-02-14 MAGNETIC SEPARATOR.

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
DE3813906 1988-04-25
DE3813906 1988-04-25
DE8805463 1988-04-25
DE3823944 1988-07-14
DE3823944A DE3823944C1 (en) 1988-04-25 1988-07-14
DE8809072U DE8809072U1 (en) 1988-04-25 1988-07-14 Permanent magnetic separator

Publications (3)

Publication Number Publication Date
EP0339195A2 EP0339195A2 (en) 1989-11-02
EP0339195A3 EP0339195A3 (en) 1990-07-11
EP0339195B1 true EP0339195B1 (en) 1993-06-30

Family

ID=39357434

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89102517A Expired - Lifetime EP0339195B1 (en) 1988-04-25 1989-02-14 Magnetic separator

Country Status (6)

Country Link
US (1) US5092986A (en)
EP (1) EP0339195B1 (en)
JP (1) JPH084759B2 (en)
CA (1) CA1337488C (en)
DE (2) DE8809072U1 (en)
ES (1) ES2041353T3 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10056658C1 (en) * 2000-11-15 2002-07-04 Steinert Gmbh Elektromagnetbau Device and method for separating a solid mixture containing metals
DE102005054811A1 (en) * 2005-07-01 2007-01-11 Steinert Elektromagnetbau Gmbh Separating a ferrous metal fraction from a mixture of materials using an electromagnet-based separator comprises identifying ferrous metal components and determining the time at which they will enter the separator
DE202009014381U1 (en) * 2009-10-23 2010-12-09 Imro Maschinenbau Gmbh Device for the separation of non-ferrous metals

Families Citing this family (48)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE58905733D1 (en) * 1988-05-19 1993-11-04 Lindemann Maschfab Gmbh DEVICE FOR SEPARATING NON-MAGNETIZABLE METALS FROM A SOLID MIXTURE.
DE3906422C1 (en) * 1989-03-01 1990-10-18 Lindemann Maschinenfabrik Gmbh, 4000 Duesseldorf, De
JPH084760B2 (en) * 1989-08-08 1996-01-24 三菱製鋼磁材株式会社 Rotary drum type non-magnetic metal separator
FR2657544B1 (en) * 1990-01-29 1992-04-17 Andrin G MAGNETIC SEPARATOR OF PARTICLES AND PIECES IN NON-FERROUS METAL.
FR2671494B1 (en) * 1991-01-10 1994-01-14 Andrin Fils Ets G MAGNETIC PARTICLE SEPARATOR IN NON - FERROUS METAL.
JPH0653531U (en) * 1991-01-25 1994-07-22 前田建設工業株式会社 Belt conveyor
JP2686006B2 (en) * 1991-09-09 1997-12-08 富士写真フイルム株式会社 Patrone recycling device and aligning device used therefor
US5411147A (en) * 1993-01-28 1995-05-02 Bond; David S. Dynamic landfill recycling system
JPH0771645B2 (en) * 1993-03-31 1995-08-02 豊田通商株式会社 Conductive material sorting device
DE4317640A1 (en) * 1993-05-27 1994-12-08 Nsm Magnettechnik Gmbh Device for influencing the position of parts of electrically conductive, non-ferromagnetic materials, in particular for transporting and/or sorting such parts
DE4323932C1 (en) * 1993-07-16 1995-02-02 Steinert Gmbh Elektromagnetbau Magnetic system for particle separation
US5522513A (en) * 1994-03-30 1996-06-04 Howell; Billy R. Separator disc
US5423433A (en) * 1994-05-06 1995-06-13 Osborn Engineering, Inc. Material separator apparatus
US5494172A (en) * 1994-05-12 1996-02-27 Miller Compressing Company Magnetic pulley assembly
US5626233A (en) * 1995-03-07 1997-05-06 Venturedyne, Ltd. Eddy current separator
US5860532A (en) * 1996-11-08 1999-01-19 Arvidson; Bo R. Material separator
DE19711340C1 (en) * 1997-03-18 1998-11-12 Steinert Elektromagnetbau Separator for particles of different conductivity, esp. in recycling
US6149014A (en) * 1997-12-04 2000-11-21 Eriez Manufacturing Co. Mill magnet separator and method for separating
US6119922A (en) * 1998-11-17 2000-09-19 Hoskins Manufacturing Company Method for making mineral insulated cable
DE10057535C1 (en) 2000-11-20 2002-08-22 Steinert Gmbh Elektromagnetbau Device for separating non-magnetizable metals and Fe components from a solid mixture
US7255793B2 (en) * 2001-05-30 2007-08-14 Cort Steven L Methods for removing heavy metals from water using chemical precipitation and field separation methods
US6634504B2 (en) 2001-07-12 2003-10-21 Micron Technology, Inc. Method for magnetically separating integrated circuit devices
ES2182716B1 (en) * 2001-07-25 2004-06-01 Virginia Campins Bagur MAGNETIC SEPARATOR OF NON-PHERROMAGNETIC METAL BODIES.
US7303094B2 (en) 2002-08-09 2007-12-04 Kevin Hutchinson Vacuum pill dispensing cassette and counting machine
US7228198B2 (en) 2002-08-09 2007-06-05 Mckesson Automation Systems, Inc. Prescription filling apparatus implementing a pick and place method
AU2003292519A1 (en) * 2003-11-07 2005-05-26 Sgm Gantry S.P.A. Magnetic separator with ferrite and rare earth permanent magnets
MXPA06014183A (en) * 2004-06-07 2007-02-14 Sgm Gantry Spa Magnetic separator for ferromagnetic materials with controlled-slip rotating roller and relevant operating method.
RU2342198C2 (en) * 2004-06-07 2008-12-27 СГМ ГАНТРИ С.п.А. Magnet separator for ferromagnetic materials with rotary roller with controlled slippage and corresponding method of operation
US20070039894A1 (en) * 2005-08-17 2007-02-22 Cort Steven L Water treatment using magnetic and other field separation technologies
DE102006021558B4 (en) * 2006-05-08 2011-06-16 Heidemann Recycling Gmbh Plant for combined screening and non-ferrous metal separation
CZ300502B6 (en) * 2006-12-31 2009-06-03 SVÚM a. s. Separator magnetic drum
WO2008085196A2 (en) * 2007-01-09 2008-07-17 Cambridge Water Technology, Inc. Fluidic sealing system for a wet drum magnetic separator
US20110017016A1 (en) * 2007-01-12 2011-01-27 Nu-Iron Technology, Llc System and method for cooling and removing iron from a hearth
WO2008131107A1 (en) * 2007-04-17 2008-10-30 Eriez Manufacturing Co. Multiple zone and multiple materials sorting
US7841474B2 (en) * 2008-11-19 2010-11-30 Outotec Oyj Beltless rare earth roll magnetic separator system and method
UA106632C2 (en) * 2009-09-07 2014-09-25 Кертін Юніверсеті Оф Текноледжі METHOD OF Sorting Bulk
WO2012121437A1 (en) * 2011-03-10 2012-09-13 한국지질자원연구원 Magnetic force sorting device
CN103008104A (en) * 2011-09-22 2013-04-03 范翔生 Waste tire crushed particle wire-removing device
FR2989288B1 (en) 2012-04-12 2015-01-16 Magpro CURRENT SEPARATOR OF FOUCAULT
NL2011525C2 (en) 2013-09-30 2015-04-01 Recco B V Eddy current seperator unit having a magnetic rotor positioned eccentrically inside an outer drum and coaxially inside an inner drum.
CN104069943A (en) * 2014-06-20 2014-10-01 周开雄 Dry magnetic separator
NL2013128B1 (en) * 2014-07-04 2016-09-09 Goudsmit Magnetic Systems B V Deflecting roller for a non-ferrous waste separator, as well as non-ferrous waste separator equipped with the deflecting roller.
CN105689117B (en) * 2016-02-05 2018-06-01 鄂尔多斯市君致清环境科技有限公司 A kind of concentration magnetic separator and the method for concentration based on the concentration magnetic separator
CN107630704B (en) * 2017-08-10 2019-12-10 中国铁建重工集团股份有限公司 Slag discharging system and slag discharging sorting method of hard rock heading machine
AT520710B1 (en) 2017-11-24 2022-07-15 Ife Aufbereitungstechnik Gmbh magnetic separator
CN111689131B (en) * 2020-07-01 2022-03-15 浙江海致建设有限公司 Transportation line deironing device that building rubbish was retrieved
DE102022104337B4 (en) 2022-02-23 2024-05-16 IMRO-Maschinenbau GmbH Separation drum and method for operating a separation drum
DE102022106004A1 (en) 2022-03-15 2023-09-21 IMRO-Maschinenbau GmbH Device for sorting objects and method for adjusting a device for sorting objects

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE298617C (en) *
DE191492C (en) *
US1462584A (en) * 1922-04-11 1923-07-24 John G Kirschner Placer-mining machine
US3448857A (en) * 1966-10-24 1969-06-10 Eriez Magnetics Electrodynamic separator
FI48535C (en) * 1972-05-26 1974-11-11 Permeco Oy Permanent magnet strong field separator
JPS5274168A (en) * 1975-12-16 1977-06-21 Agency Of Ind Science & Technol Separation of hairy metallic materials from solid waste pieces
DE58905733D1 (en) * 1988-05-19 1993-11-04 Lindemann Maschfab Gmbh DEVICE FOR SEPARATING NON-MAGNETIZABLE METALS FROM A SOLID MIXTURE.

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10056658C1 (en) * 2000-11-15 2002-07-04 Steinert Gmbh Elektromagnetbau Device and method for separating a solid mixture containing metals
DE102005054811A1 (en) * 2005-07-01 2007-01-11 Steinert Elektromagnetbau Gmbh Separating a ferrous metal fraction from a mixture of materials using an electromagnet-based separator comprises identifying ferrous metal components and determining the time at which they will enter the separator
DE102005054811B4 (en) * 2005-07-01 2007-06-14 Steinert Elektromagnetbau Gmbh Method and device for separating metal fractions and / or parts from material mixtures
DE202009014381U1 (en) * 2009-10-23 2010-12-09 Imro Maschinenbau Gmbh Device for the separation of non-ferrous metals

Also Published As

Publication number Publication date
US5092986A (en) 1992-03-03
DE3823944C1 (en) 1989-11-30
CA1337488C (en) 1995-10-31
JPH02218451A (en) 1990-08-31
DE8809072U1 (en) 1988-10-06
EP0339195A3 (en) 1990-07-11
JPH084759B2 (en) 1996-01-24
EP0339195A2 (en) 1989-11-02
ES2041353T3 (en) 1993-11-16

Similar Documents

Publication Publication Date Title
EP0339195B1 (en) Magnetic separator
EP0898496B1 (en) Device and process for separating particles with a rotary magnet system
DE3872986T3 (en) Process and apparatus for separating non-ferrous metal pieces.
DE3906422C1 (en)
DE2653373C2 (en) Device for sorting electrically conductive pieces of material from a batch flow
DE20321893U1 (en) Electrostatic high voltage classifier
DE3331245A1 (en) LEVEL MAGNETRON SPRAYING DEVICE
DE102009056717A1 (en) Device and method for the separation of differently electrically conductive particles
DE3120945A1 (en) ELECTROSTATIC SORTING DEVICE
DE2356087A1 (en) METHOD AND DEVICE FOR SEPARATING RELATIVELY HEAVY AND LIGHTER MATERIALS
DE19649154C1 (en) Method of improving separating precision of fluidised bed separators
DE60012989T2 (en) FRICTION CHARGING AND ELECTROSTATIC SEPARATION OF MIXED ELECTRICALLY INSULATED PARTICLES
EP0550867B1 (en) Device for separating non-magnetisable metals from a mixture of solids
DE19737161A1 (en) Separation of shredded ferrous and nonferrous metals
DE4223812C1 (en)
DE19634802A1 (en) Device and method for particle separation with a rotating magnet system
EP0912248B1 (en) Process and device for separating mixtures of finely divided materials by means of a magnetic field
DE102022104606B3 (en) POWDER SEPARATION PLANT AND PROCESS FOR SEPARATING THE FERROMAGNETIC FACTOR OF A POWDER FROM ITS NON-FERROMAGNETIC FACTOR
DE2851319C2 (en) Magnetic drum cutter
EP3488932A1 (en) Separation of components of a mixture containing metal
DE3810715C2 (en)
DE2832275B1 (en) Magnetic separator
DE3423866C2 (en) Device for separating non-magnetizable electrically conductive metal parts from a solid mixture
DE2643415A1 (en) METHOD AND DEVICE FOR MAGNETIC SORTING
DE202016103266U1 (en) Device for separating particles of different electrical conductivity in an inhomogeneous sorting material

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A2

Designated state(s): AT BE CH DE ES FR GB GR IT LI LU NL SE

GBC Gb: translation of claims filed (gb section 78(7)/1977)
PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

EL Fr: translation of claims filed
AK Designated contracting states

Kind code of ref document: A3

Designated state(s): AT BE CH DE ES FR GB GR IT LI LU NL SE

17P Request for examination filed

Effective date: 19900820

17Q First examination report despatched

Effective date: 19910320

17Q First examination report despatched

Effective date: 19920901

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT BE CH DE ES FR GB GR IT LI LU NL SE

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 19930630

REF Corresponds to:

Ref document number: 91090

Country of ref document: AT

Date of ref document: 19930715

Kind code of ref document: T

REF Corresponds to:

Ref document number: 58904827

Country of ref document: DE

Date of ref document: 19930805

ET Fr: translation filed
GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)

Effective date: 19930730

ITF It: translation for a ep patent filed
REG Reference to a national code

Ref country code: ES

Ref legal event code: FG2A

Ref document number: 2041353

Country of ref document: ES

Kind code of ref document: T3

EPTA Lu: last paid annual fee
PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Effective date: 19941101

EAL Se: european patent in force in sweden

Ref document number: 89102517.3

REG Reference to a national code

Ref country code: GB

Ref legal event code: IF02

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: CH

Payment date: 20080215

Year of fee payment: 20

Ref country code: ES

Payment date: 20080228

Year of fee payment: 20

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: LU

Payment date: 20080225

Year of fee payment: 20

Ref country code: NL

Payment date: 20080214

Year of fee payment: 20

Ref country code: SE

Payment date: 20080214

Year of fee payment: 20

Ref country code: IT

Payment date: 20080220

Year of fee payment: 20

Ref country code: GB

Payment date: 20080220

Year of fee payment: 20

REG Reference to a national code

Ref country code: CH

Ref legal event code: PFA

Owner name: STEINERT ELECTROMAGNETBAU GMBH

Free format text: STEINERT ELECTROMAGNETBAU GMBH#WIDDERSDORFER STRASSE 329-331 POSTFACH 451 160#KOELN 41 (DE) -TRANSFER TO- STEINERT ELECTROMAGNETBAU GMBH#WIDDERSDORFER STRASSE 329-331 POSTFACH 451 160#KOELN 41 (DE)

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: AT

Payment date: 20080215

Year of fee payment: 20

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 20080214

Year of fee payment: 20

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: BE

Payment date: 20080327

Year of fee payment: 20

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

REG Reference to a national code

Ref country code: GB

Ref legal event code: PE20

Expiry date: 20090213

NLV7 Nl: ceased due to reaching the maximum lifetime of a patent

Effective date: 20090214

EUG Se: european patent has lapsed
REG Reference to a national code

Ref country code: ES

Ref legal event code: FD2A

Effective date: 20090216

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Free format text: LAPSE BECAUSE OF EXPIRATION OF PROTECTION

Effective date: 20090214

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF EXPIRATION OF PROTECTION

Effective date: 20090213

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: ES

Free format text: LAPSE BECAUSE OF EXPIRATION OF PROTECTION

Effective date: 20090216