EP2877288A1 - Procédé pour extraire des aimants permanents d'un mélange de déchets - Google Patents

Procédé pour extraire des aimants permanents d'un mélange de déchets

Info

Publication number
EP2877288A1
EP2877288A1 EP13759974.2A EP13759974A EP2877288A1 EP 2877288 A1 EP2877288 A1 EP 2877288A1 EP 13759974 A EP13759974 A EP 13759974A EP 2877288 A1 EP2877288 A1 EP 2877288A1
Authority
EP
European Patent Office
Prior art keywords
permanent magnets
scrap mixture
scrap
magnetic field
mixture
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.)
Withdrawn
Application number
EP13759974.2A
Other languages
German (de)
English (en)
Inventor
Lutz BABERG
Ralf Holzhauer
Mathias RUPPRECHT
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.)
Westfalische Hochschule Gelsenkirchen Bocholt Recklinghausen
Original Assignee
Westfalische Hochschule Gelsenkirchen Bocholt Recklinghausen
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 Westfalische Hochschule Gelsenkirchen Bocholt Recklinghausen filed Critical Westfalische Hochschule Gelsenkirchen Bocholt Recklinghausen
Publication of EP2877288A1 publication Critical patent/EP2877288A1/fr
Withdrawn legal-status Critical Current

Links

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
    • B03C1/005—Pretreatment specially adapted for magnetic separation
    • 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
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B1/00—Preliminary treatment of ores or scrap
    • C22B1/005—Preliminary treatment of scrap
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B59/00—Obtaining rare earth metals
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00—Technologies related to metal processing
    • Y02P10/20—Recycling

Definitions

  • the invention relates to a method for the separation of permanent magnets from a scrap mixture.
  • shredded process treatment is shredded.
  • a method known in the prior art is essentially based on the fact that conductive non-ferrous metals can be separated from magnetic or at least magnetizable materials and other non-magnetic substances by an alternating magnetic field, which can be generated, for example, with a so-called eddy current separator.
  • the known technique is based on the fact that eddy currents are induced by a changing magnetic field in the non-magnetic, non-magnetizable, but current-conducting metals, which in turn lead to the formation of a magnetic field in the material in question, so that there is an interaction, in particular a repulsive interaction between the magnetic field generated by eddy currents and the alternating magnetic field, so that in the known technique, the non-magnetic and not
  • Materials and non-conductive materials remain in the scrap mixture and are initially carried in the direction of the scrap mixture.
  • the further separation of the remaining scrap mixture is characterized in that the magnetic and magnetizable materials in the range of action of the alternating magnetic field on
  • permanent magnets which include rare earths, so for example, permanent magnets of neodymium-iron-boron and samarium-cobalt. These rare earth permanent magnets have compared to
  • rare earths comprehensive magnets are used today in a variety of devices that are usually recycled after their intended use, there is a high economic interest, especially these rare earths Separate comprehensive permanent magnet from a scrap mixture, especially since such materials are traded on the world market high priced.
  • this object is achieved by a method in which the exclusion of rare earth comprehensive permanent magnet from a
  • rare earth permanent magnets are partially demagnetized at least temporarily.
  • alternating magnetic field can be separated out of the scrap mixture, in particular at least by active magnetic repulsion, as otherwise known in the art only of conductive, but not magnetic and non-magnetizable metals.
  • Partially demagnetized rare earth-comprising permanent magnets show here despite their remaining residual magnetization in the alternating magnetic field obviously due to generated eddy currents an unexpected behavior, which is otherwise known only by non-magnetic and non-magnetizable metals.
  • the rare earths comprise at least partially partially demagnetized
  • Permanent magnet has its own separated fraction.
  • the separation from the scrap mixture according to the invention is based on an interaction of the rare earth permanent magnet with the alternating magnetic field, according to which these permanent magnets in their leadership by the at least one magnetic field from the surface on which they are guided, such as a slide or also an actively operated
  • Conveyor belt within the magnetic field so to speak, begin to dance, in that they are repeatedly redirected according to the changing magnetic field, thereby standing out from the surface on which they are guided, and partly due to the airspeed, the magnets on the guide surface relative to the magnetic field, and in particular also on the other by an optionally additionally acting magnetic repulsion from the scrap mixture are separated.
  • Such a movement excitation can, for example, by mechanical
  • Vibrations are caused, for example, by shaking an actively operated conveyor belt, which rests on the scrap mixture, or by shaking a chute, via which the scrap mixture following the gravity down and through the at least one alternating magnetic field
  • the partial demagnetization treatment takes place by heating the scrap mixture.
  • the heating is preferably carried out in such a way that the temperature which reaches the scrap mixture remains below the Curie temperature of the permanent magnets to be discarded, in order to ensure that the permanent magnets have at least one permanent magnet
  • partially demagnetized permanent magnet not behave just like non-magnetic or magnetizable metals and thus would remain in the separation process in the fraction of these materials.
  • the magnetization of the rare earth contained permanent magnet is to be reduced according to the invention, but at least one Residual magnetization is to remain, which is achieved by the fact that remains at a temperature treatment by means of heating the selected temperature below said Curie temperature, above the otherwise one
  • heating takes place at a temperature in the range from 80 ° to 400 ° Celsius, preferably from 80 to 250 ° Celsius.
  • the Curie temperature of these types of permanent magnets is typically in the range of 310 to 320 degrees Celsius.
  • the Curie temperature, for example, of permanent magnets based on samarium cobalt is typically above 700 ° C, so that there is also the possibility, by deliberately selecting the
  • neodymium-containing permanent magnets exhibit a strong decrease in magnetic field strength with increasing temperature, in contrast to samarium-based permanent magnets, in contrast, a rather flat sloping
  • Permanent magnets are hardly affected in terms of their magnetic field strength and thus remain in the process according to the invention in the other fraction of the permanent magnet or magnetizable metals, whereas only the weakened in magnetization neodymium-based permanent magnet according to the method separated from the scrap mixture, in particular repelled. Especially for eliminating the already mentioned neodymium contained
  • these neodymium-based permanent magnets have such a strong demagnetization that the
  • magnetic alternating field can be separated.
  • Scrap mixture takes place up to a temperature level below the so-called working temperature of the rare earth comprehensive permanent magnets.
  • Cooling the permanent magnets is reversible.
  • the rare earth comprising permanent magnets in the scrap mixture
  • Heating over this particular working temperature which is very different for example for neodymium and samarium-based permanent magnets, causes the Generalentmagnetleiter achieved is irreversible, so that the heating of the scrap mixture in this inventive variant also basically at any time before passing through the least a
  • the scrap mixture can be passed in this process variant in the cold state or at ambient temperature by the alternating magnetic field, as previously performed at any time
  • Temperature of 250 ° Celsius causes all known neodymium based permanent magnets available on the market, even if they through
  • Addition of terbium and / or dysprosium are temperature-stabilized, can be partially permanently demagnetized.
  • the maximum operating temperature hitherto achieved in the prior art is about 230 ° Celsius.
  • the method is carried out several times in succession, wherein each execution of the method is carried out at a different temperature, in particular where it may be provided, the temperature to which the scrap mixture is maximally heated by execution Embodiment of the invention
  • Magnetic field fractionation with respect to different rare earths are made, in particular at the lowest heating temperatures pure neodymium iron boron magnets with lowest working temperature form the fraction formed thereby, with an increasing heating temperature, the dysprosium and terbium in the fraction formed and optionally at the highest heating temperatures Samarium cobalt based permanent magnets make up the majority of the fraction because these permanent magnets have the lowest demagnetization with increasing temperature.
  • Demagnetization can, as mentioned above, by the heating of the
  • Scrap mixtures take place, which can be carried out, for example, by transporting the scrap mixture into or through a heated furnace in which the scrap mixture remains a sufficient residence time to the desired target temperature, in particular the desired target temperature below the respective Curie temperature of perennialschondernden Rare earth-reaching permanent magnet achieved.
  • other types of heating can be performed, such as irradiating the scrap mixture with electromagnetic waves, such as microwaves or even imparting an electric current through the scrap mixture, for example within a high voltage field.
  • Partial demagnetization treatment by cooling the scrap mixture to make, since on rare earth-based permanent magnets even at sufficiently low temperatures show Diagramentmagnetleiter, especially at temperatures below minus 130 ° C, especially based on neodymium-based permanent magnets.
  • the at least one alternating electromagnetic field for carrying out the method according to the invention can be produced in various ways be, for example, by the known in the prior art Wirbelstromabscheider in which the scrap mixture is guided around by means of a conveyor belt to a rotating roller in which a flywheel, with in
  • Eddy current is used to separate metallic conductive but non-magnetic and non-magnetizable materials by repellency effects from the scrap mixture.
  • a rotational speed of the pole wheel of such is preferred
  • Rotational speed usually for the purpose of separating non-magnetic or non-magnetizable metals
  • it may be independent of the nature of the generation of the alternating magnetic field, that is, regardless of whether, for example, with an eddy current separator or with a through
  • the frequency of the magnetic field is chosen such that it is less than 300 hertz, preferably less than 150 hertz and more preferably less than 100 hertz.
  • rare earth permanent magnets are separated from the scrap mixture, in particular whereas both magnetizable metals, as well as the other fractions of non-magnetic and non-magnetizable metals and non-metals by this type of treatment by the alternating magnetic field not separated, in particular not repelled, thus remain in the scrap mixture and form a residual fraction, which can then be further split, unless the prefractionation mentioned above was made.
  • the scrap mixture is successively separated by a plurality of magnetic
  • Embodiment can also be combined with an embodiment in which between the respective passing through at least one alternating magnetic field, the scrap mixture is heated to a different temperature or was.
  • the selection can be increased in total by different frequencies in magnetic fields or also a selection for different rare earths such as neodymium or samarium done.
  • the successive passage through alternating magnetic fields with different frequencies can be achieved, for example, that in the longitudinal direction of a slide on which the scrap mixture slides down the following gravity coil arrangements or other
  • Rotation speed rotates but a plurality of pole wheels with different rotational speeds, so that in the circumferential direction of the roller lying on the conveyor belt scrap mixture depends on the distance traveled in the circumferential direction in magnetic field areas with different
  • the inventive method makes it possible to obtain from scrap permanent magnets, in particular partially demagnetized permanent magnets, which include rare earths, in particular to form a separate fraction of such permanent magnets.
  • Permanent magnets thus obtained can be reused, e.g. by re-magnetization or the rare earths contained therein can be recovered, for example, this for the new production of
  • Rare earth permanent magnets in particular partially demagnetized permanent magnets of this type can thus be used according to the invention as a resource of rare earths.
  • Figure 2 the implementation of the method by means of a chute
  • FIG. 1 shows an apparatus for carrying out the method according to the invention, which is essentially formed by an eddy current separator known in the prior art, in which a conveyor belt 1 is guided around a roller 2, within the coaxial with the axis of rotation 3 of the roller a so-called pole wheel 4th rotates, in particular in opposite directions rotates, whereby by the flywheel 4 in the contact region of the conveyor belt 1 to the roller 2 acts on the scrap mixture formed from a plurality of fractions 5 an alternating magnetic field.
  • the scrap mixture 5 is applied according to this embodiment to the conveyor belt 1 of the eddy current separator, it being possible here to provide that the scrap mixture 5 already has an upstream, not shown here,
  • Permanent magnets happen the changing magnetic field or permanently, depending on whether in the sectionentmagnettechnischs adaptation a
  • the rare earth is contained in the interaction region 6, in which the alternating magnetic field acts on the scrap mixture.
  • Permanent magnets 5a lifted by constant reorientation in the alternating magnetic field from the surface of the conveyor belt 1 and separated at least due to the impressed by the conveyor belt speed component of the scrap mixture.
  • Non-metallic materials 5b as well as materials that are metallic, but in which, however, due to the particular comparatively low
  • a total of three fractions are formed, of which one fraction contains rare earths 5a containing rare earths, at least with a high separation rate.
  • FIG. 2 shows an alternative embodiment in which a chute 10 is provided, which has an angle to the horizontal, so that scrap mixture applied thereto follows the chute by gravity 10 slip down and slip on its way through the area 11 of a changing magnetic field acting there, so that there the substantially same effect is generated as in the previous embodiment, namely that the previously by a GeneralentmagnetmaschinesAN at least partially demagnetized rare earth comprising permanent magnet 5a of the
  • Magnetic field region 11 a separating plate 13 is provided, on which arise from the scrap mixturendsepar investigating rare earth comprehensive permanent magnet 5a and form a separate fraction.
  • Any magnetizable fraction which may adhere to the chute in the region of the alternating magnetic field may e.g. be removed by further process steps, e.g. in that by means of a conveyor belt or a slider, the magnetizable fraction is removed.
  • the magnetic field generated by the device 12 may act through a non-shielding region 14 above the chute.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Geology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Environmental & Geological Engineering (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Processing Of Solid Wastes (AREA)
  • Manufacture And Refinement Of Metals (AREA)

Abstract

L'invention concerne un procédé pour extraire des aimants permanents d'un mélange de déchets, procédé suivant lequel, pour extraire des aimants permanents (5a) comprenant des terres rares d'un mélange de déchets (5), le mélange de déchets (5) est soumis à un traitement de démagnétisation partielle suivant lequel les aimants permanents (5a) comprenant des terres rares sont au moins temporairement partiellement démagnétisés, puis le mélange de déchets (5) est entraîné à travers au moins un champ magnétique alternatif (6, 11) et les aimants permanents (5a) comprenant des terres rares partiellement démagnétisés, sont séparés du mélange de déchets (5) au moyen du ou des champs magnétiques alternatifs (6, 11). De plus l'invention concerne également des aimants permanents comprenant des terres rares, partiellement démagnétisés, qui peuvent être obtenus selon ce procédé, ainsi que l'utilisation d'aimants permanents pour l'extraction de terres rares de ces aimants.
EP13759974.2A 2012-07-27 2013-07-23 Procédé pour extraire des aimants permanents d'un mélange de déchets Withdrawn EP2877288A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE201210014849 DE102012014849A1 (de) 2012-07-27 2012-07-27 Verfahren zur Aussonderung von Dauermagneten aus einem Schrottgemisch
PCT/EP2013/002173 WO2014015973A1 (fr) 2012-07-27 2013-07-23 Procédé pour extraire des aimants permanents d'un mélange de déchets

Publications (1)

Publication Number Publication Date
EP2877288A1 true EP2877288A1 (fr) 2015-06-03

Family

ID=49162106

Family Applications (1)

Application Number Title Priority Date Filing Date
EP13759974.2A Withdrawn EP2877288A1 (fr) 2012-07-27 2013-07-23 Procédé pour extraire des aimants permanents d'un mélange de déchets

Country Status (3)

Country Link
EP (1) EP2877288A1 (fr)
DE (1) DE102012014849A1 (fr)
WO (1) WO2014015973A1 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102013205408A1 (de) * 2013-03-27 2014-10-16 Siemens Aktiengesellschaft Verfahren zur Abtrennung von Seltenerdmetallpartikeln aus einem Seltenerdmetalle enthaltenden Gemenge
DE102014211289B4 (de) * 2014-06-12 2024-04-25 Fne Entsorgungsdienste Freiberg Gmbh Vorrichtung und Verfahren zur Abtrennung und Konzentration von Bestandteilen mit magnetischem Verhalten aus einer ionenhaltigen Lösung
WO2017079183A1 (fr) * 2015-11-06 2017-05-11 Ut-Battelle, Llc Système et procédé pour le recyclage d'aimants à terres rares
AU2017201318B2 (en) * 2016-02-29 2023-08-24 Veytech Diagnostic Services Pty Ltd Demagnetisation system
CN107684973A (zh) * 2017-09-30 2018-02-13 无锡市稀土永磁厂 稀土永磁材料的带式回收机

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0771645B2 (ja) * 1993-03-31 1995-08-02 豊田通商株式会社 導電性材料選別装置
DE19838170C2 (de) * 1998-08-21 2001-06-07 Meier Staude Robert Verfahren und Vorrichtung zur Wirbelstromscheidung von Materialgemischen in Teilchenform
DE19843883C1 (de) * 1998-09-24 1999-10-07 Vacuumschmelze Gmbh Verfahren zur Wiederverwendung von Dauermagneten
US7571814B2 (en) * 2002-02-22 2009-08-11 Wave Separation Technologies Llc Method for separating metal values by exposing to microwave/millimeter wave energy
GB2486175A (en) * 2010-12-02 2012-06-13 Univ Birmingham Separating rare earth magnetic materials from electronic devices
GB201101201D0 (en) * 2011-01-24 2011-03-09 Univ Birmingham Magnet recovery method

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
None *
See also references of WO2014015973A1 *

Also Published As

Publication number Publication date
WO2014015973A1 (fr) 2014-01-30
DE102012014849A1 (de) 2014-01-30

Similar Documents

Publication Publication Date Title
EP2877288A1 (fr) Procédé pour extraire des aimants permanents d'un mélange de déchets
DE102012017418B4 (de) Verfahren zur Gewinnung des Doppelsalzes NaNd(SO4)2 *H20 aus einem Ausgangsgemisch
DE102015115217A1 (de) Hochtemperatur-Hybridpermanentmagnet
WO2010031619A1 (fr) Procédé pour séparer des particules de minerais précieux d'agglomérats contenant des particules de minerais précieux et des particules magnétisables déposées sur ceux-ci, notamment des particules de fe3o4
EP2659983A2 (fr) Tambour de séparation avec tiges de pôle pouvant être déployées et rétractées radialement par rapport à un arbre d'entraînement pour le réglage de la force d'attraction magnétique, et séparateur pour pièces contenant du fer à l'aide du tambour de séparation
EP1447138B1 (fr) Traitement des scories provenant des incinérateurs d'ordures
EP0881952B1 (fr) Procede et dispositif pour augmenter la precision de separation de separateurs a courant de foucault
WO2014154517A1 (fr) Procédé de séparation de particules de métaux des terres rares présentes dans un mélange contenant des métaux des terres rares
DE69008922T2 (de) Verfahren zum Verpacken von permanentmagnetischem Pulver.
EP3431209B1 (fr) Procédé et installation de fabrication d'un matériau de départ pour la fabrication d'aimants à terres rares
EP3572165B1 (fr) Procédé de fabrication d'un matériau pour la fabrication d'aimants en terres rares
DE102011011132B4 (de) Verwendung von NIR-Strahlung, mindestens einem elektrischen Wechselfeld, mindestens einem magnetischen Wechselfeld, mindestens einem elektromagnetischen Wechselfeld oder einer Kombination daraus zum Aufschluss von Erz
DE2900655A1 (de) Verfahren zum trennen von gummi und metallbestandteilen aus gummibeschichteten stahlkordbestandteilen
DE102013102154B4 (de) Verfahren zum Herstellen eines magnetokalorisch aktiven Bauteils für magnetischen Wärmetausch
DE10122569B4 (de) Verfahren zur Erzeugung von reinen, feinkörnigen, nichtmagnetisierbaren Schüttgütern
DE102019000962B4 (de) Verfahren auf Basis von Doppelstatorinduktoranordnungen mit Induktoren zur Generierung hochfrequenter, polyharmonischer elektromagnetischer Wanderwellen zur Anwendung in verschiedenen technologischen Prozessen der elektrodynamischen Separation nichtferromagnetischer, leitfähiger Materialien
EP2984191A1 (fr) Procédé et dispositif d'extraction de résidus de métaux ferreux purs et libres contenus dans un mélange de déchets métalliques broyés
AT520710A1 (de) Magnetscheider
DE2827694A1 (de) Sinterprodukt aus metallpulver und verfahren zu dessen herstellung
DE102017008513B4 (de) Vorrichtung und Verfahren zum Zerkleinern, Desagglomerieren, Dispergieren und Mischen von dispersen Stoffen und pumpfähigen Mehrphasengemischen
DE102013201895A1 (de) Verfahren zum Nutzen und Vorrichtung zum Reinigen von Permamentmagneten
WO2012175310A1 (fr) Procédé et dispositif pour séparer une première susbtance d'un flux de substances primaire coulant et dispositif de commande et/ou de régulation
EP3572170B1 (fr) Procédé de fabrication d'un matériau de départ pour la fabrication d'aimants en terres rares
DE102019116748A1 (de) Trennung von mangan-bismut-pulvern
DE3046515A1 (de) Verfahren zur herstellung von anisotropen dauermagneten

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

17P Request for examination filed

Effective date: 20141212

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

AX Request for extension of the european patent

Extension state: BA ME

RIN1 Information on inventor provided before grant (corrected)

Inventor name: BABERG, LUTZ

Inventor name: HOLZHAUER, RALF

Inventor name: RUPPRECHT, MATHIAS

DAX Request for extension of the european patent (deleted)
GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

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

Free format text: STATUS: GRANT OF PATENT IS INTENDED

RIC1 Information provided on ipc code assigned before grant

Ipc: C22B 1/00 20060101ALI20170407BHEP

Ipc: B03C 1/005 20060101AFI20170407BHEP

Ipc: B03C 1/247 20060101ALI20170407BHEP

Ipc: C22B 59/00 20060101ALI20170407BHEP

Ipc: B03C 1/24 20060101ALI20170407BHEP

INTG Intention to grant announced

Effective date: 20170503

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

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 20170914