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GB201201215D0 - Magnet recovery - Google Patents

Magnet recovery

Info

Publication number
GB201201215D0
GB201201215D0 GB201201215A GB201201215A GB201201215D0 GB 201201215 D0 GB201201215 D0 GB 201201215D0 GB 201201215 A GB201201215 A GB 201201215A GB 201201215 A GB201201215 A GB 201201215A GB 201201215 D0 GB201201215 D0 GB 201201215D0
Authority
GB
United Kingdom
Prior art keywords
rare earth
assembly
magnet
earth magnets
hydrogen gas
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Withdrawn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
GB201201215A
Other versions
GB2487656A (en
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.)
University of Birmingham
Original Assignee
University of Birmingham
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 University of Birmingham filed Critical University of Birmingham
Publication of GB201201215D0 publication Critical patent/GB201201215D0/en
Publication of GB2487656A publication Critical patent/GB2487656A/en
Withdrawn legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F1/00—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties
    • H01F1/01—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials
    • H01F1/03—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity
    • H01F1/032—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials
    • H01F1/04—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials metals or alloys
    • H01F1/047—Alloys characterised by their composition
    • H01F1/053—Alloys characterised by their composition containing rare earth metals
    • H01F1/055—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5
    • H01F1/057—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and IIIa elements, e.g. Nd2Fe14B
    • H01F1/0571—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and IIIa elements, e.g. Nd2Fe14B in the form of particles, e.g. rapid quenched powders or ribbon flakes
    • H01F1/0573—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and IIIa elements, e.g. Nd2Fe14B in the form of particles, e.g. rapid quenched powders or ribbon flakes obtained by reduction or by hydrogen decrepitation or embrittlement
    • 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
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F9/00—Making metallic powder or suspensions thereof
    • B22F9/02—Making metallic powder or suspensions thereof using physical processes
    • B22F9/023—Hydrogen absorption
    • 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
    • C22B7/00—Working up raw materials other than ores, e.g. scrap, to produce non-ferrous metals and compounds thereof; Methods of a general interest or applied to the winning of more than two metals
    • C22B7/001—Dry processes
    • C22B7/002—Dry processes by treating with halogens, sulfur or compounds thereof; by carburising, by treating with hydrogen (hydriding)
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F1/00—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties
    • H01F1/01—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials
    • H01F1/03—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity
    • H01F1/032—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials
    • H01F1/04—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials metals or alloys
    • H01F1/047—Alloys characterised by their composition
    • H01F1/053—Alloys characterised by their composition containing rare earth metals
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F1/00—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties
    • H01F1/01—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials
    • H01F1/03—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity
    • H01F1/032—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials
    • H01F1/04—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials metals or alloys
    • H01F1/047—Alloys characterised by their composition
    • H01F1/053—Alloys characterised by their composition containing rare earth metals
    • H01F1/055—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5
    • H01F1/0553—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 obtained by reduction or by hydrogen decrepitation or embrittlement
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F9/00—Making metallic powder or suspensions thereof
    • B22F2009/001—Making metallic powder or suspensions thereof from scrap particles
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Manufacturing & Machinery (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Power Engineering (AREA)
  • Environmental & Geological Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Manufacture And Refinement Of Metals (AREA)
  • Hard Magnetic Materials (AREA)

Abstract

A method, or portable apparatus, suitable for removing one or more rare earth magnets 14 from an assembly 10, comprises: exposing at least one or more selected rare earth magnets 18 to hydrogen gas, whilst in situ within an assembly 10, such that hydrogen decrepitation occurs. The decrepitation process causes the selected rare earth magnets 18 to disintegrate into a particulate form 40 which may be attracted to a magnet 38 such that it can be removed from the remaining assembly 10. This process may be used to remove faulty or damaged rare earth magnets 18 from assembly arrangements 10 for various devices such as motor or generator arrangements. The recovered rare earth particulate 40 may be reused to form new rare earth magnets. The portable apparatus may include a reaction cell 22 which may be releasably attached to a surface of the magnet 18 and/or assembly 10 to enclose a surface of a selected rare earth magnet 18 and a hydrogen gas control system 24, 26 is connectable to the reaction cell 22. The surface of a selected magnet 18 may be scored to aid the process.
GB1201215.9A 2011-01-24 2012-01-24 Magnet removal using hydrogen decrepitation Withdrawn GB2487656A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB201101201A GB201101201D0 (en) 2011-01-24 2011-01-24 Magnet recovery method

Publications (2)

Publication Number Publication Date
GB201201215D0 true GB201201215D0 (en) 2012-03-07
GB2487656A GB2487656A (en) 2012-08-01

Family

ID=43769533

Family Applications (2)

Application Number Title Priority Date Filing Date
GB201101201A Ceased GB201101201D0 (en) 2011-01-24 2011-01-24 Magnet recovery method
GB1201215.9A Withdrawn GB2487656A (en) 2011-01-24 2012-01-24 Magnet removal using hydrogen decrepitation

Family Applications Before (1)

Application Number Title Priority Date Filing Date
GB201101201A Ceased GB201101201D0 (en) 2011-01-24 2011-01-24 Magnet recovery method

Country Status (2)

Country Link
GB (2) GB201101201D0 (en)
WO (1) WO2012101398A1 (en)

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102012014849A1 (en) * 2012-07-27 2014-01-30 Westfälische Hochschule Gelsenkirchen, Bocholt, Recklinghausen Process for the separation of permanent magnets from a scrap mixture
DE102013205408A1 (en) * 2013-03-27 2014-10-16 Siemens Aktiengesellschaft A method of separating rare earth metal particles from a mixture containing rare earth metals
AU2014281646A1 (en) 2013-06-17 2016-02-11 Urban Mining Technology Company, Llc Magnet recycling to create Nd-Fe-B magnets with improved or restored magnetic performance
CN103551563B (en) * 2013-10-11 2016-02-17 南通万宝磁石制造有限公司 A kind of regeneration method of rare earth permanent-magnetic material
US9336932B1 (en) 2014-08-15 2016-05-10 Urban Mining Company Grain boundary engineering
CN104827041B (en) * 2015-04-23 2016-09-14 合肥工业大学 A method and equipment for stripping the metal coating on the surface of waste NdFeB permanent magnets
US10643776B2 (en) * 2015-11-06 2020-05-05 Ut-Battelle, Llc System and method for the recycling of rare earth magnets
JP7108545B2 (en) 2016-01-28 2022-07-28 ノヴェオン マグネティックス，インク． Grain boundary engineering of sintered magnetic alloys and compositions derived therefrom
DE102016007038A1 (en) * 2016-06-08 2017-12-14 Audi Ag Method for recycling at least one magnet of an electrical machine
DE102016216353A1 (en) 2016-08-30 2018-03-01 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Recycling process for the production of isotropic, magnetic powders
DE102016216355A1 (en) 2016-08-30 2018-03-01 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Process for recycling permanent magnets by melting and rapid solidification
US11611266B2 (en) 2018-12-18 2023-03-21 Ut-Battelle, Llc Automated recovery of rare earth permanent magnets from electric machines
US11230752B2 (en) 2019-02-25 2022-01-25 Ut-Battelle, Llc Hard disk drive dismantlement for critical material recovery
US10860009B1 (en) 2019-05-18 2020-12-08 Jack Harper Apparatus for dismantling a plurality of hard disk drives
CN115747611B (en) * 2022-10-13 2023-10-20 包头金山磁材有限公司 Auxiliary alloy cast sheet, high-remanence high-coercivity neodymium-iron-boron permanent magnet and preparation method

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5143560A (en) * 1990-04-20 1992-09-01 Hitachi Metals, Inc., Ltd. Method for forming Fe-B-R-T alloy powder by hydrogen decrepitation of die-upset billets
US5091020A (en) * 1990-11-20 1992-02-25 Crucible Materials Corporation Method and particle mixture for making rare earth element, iron and boron permanent sintered magnets
US5354040A (en) * 1991-11-28 1994-10-11 Mitsubishi Materials Corporation Apparatus for closed cycle hydrogenation recovery and rehydrogenation
DE19843883C1 (en) * 1998-09-24 1999-10-07 Vacuumschmelze Gmbh Method for recycling of permanent magnets forming part of scrap material
CN1231754C (en) * 2001-03-16 2005-12-14 昭和电工株式会社 Quality assessment method and production method of rare earth magnet alloy ingot
KR100516512B1 (en) * 2003-10-15 2005-09-26 자화전자 주식회사 The making method of high coercive micro-structured powder for bonded magnets and The magnet powder thereof
JP2012062532A (en) * 2010-09-16 2012-03-29 Mitsubishi Materials Corp Collection method of rare earth alloy powder from used product

Also Published As

Publication number Publication date
GB2487656A (en) 2012-08-01
WO2012101398A8 (en) 2012-09-07
WO2012101398A1 (en) 2012-08-02
GB201101201D0 (en) 2011-03-09

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Legal Events

Date Code Title Description
WAP Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1)