ndfeb waste disposal

Recycling of Rare-Earth Magnets - Fraunhofer Materials

In particular, only few promising approaches exist for the processing of old magnets and magnet waste that, on the one hand, exploit the full potential of the already separated rare earth elements they contain and, on the other, are able to remove unwanted impurities (e. g. oxide, organic compounds).

Recycling of neodymium iron boron magnet scrap. Report of ...

@article{osti_5525319, title = {Recycling of neodymium iron boron magnet scrap. Report of Investigations/1993}, author = {Lyman, J.W. and Palmer, G.R.}, abstractNote = {The U.S. Bureau of Mines investigated methods of separating valuable rare-earth materials from Fe in neodymium iron boron (NdFeB) magnet scrap. The best separation of rare earths from bulk NdFeB magnet scrap was …

Recycling Potential of Neodymium: The Case of Computer ...

Recycling Potential of Neodymium: The Case of Computer Hard Disk Drives ... (Nd) and dysprosium (Dy) from the waste NdFeB magnets is one of the key REE ... Recycling NdFeB magnets is …

Safety Information - MAGCRAFT

Rare-earth magnets should be disposed of in compliance with local, state, and Federal law. All strong permanent magnets should be thermally demagnetized prior to disposal. Alternatively, all strong permanent magnets should be placed in a steel container prior to disposal so the magnets do not attract waste disposal equipment or refuse containers.

Hydrometallurgical Treatment of Neodymium Magnet Waste

Hydrometallurgical recovery of REEs from NdFeB waste, currently mostly performed on a research level, is an attractive way of recycling since it is efficient and high purity fractions can be achieved. This method is also not as energy intensive as the pyrometallurgical methods [3, 4, 14-17].

Characterization and Leaching of Neodymium Magnet …

Characterization and Leaching of Neodymium Magnet Waste ... Ideally, in the recycling process, selective dissolution of the rare-earths (and the valuable boron), except iron, would ... REEs out of the leachate formed from NdFeB magnet waste is TODGA ( N, 0, N0-tetraoctyl-diglycolamide).

New Service: Recycling Magnets - Magnet Sales

Magnet Sales now offers a NdFeB recycling service to help prevent the unnecessary disposal of rare earth metals. We are able to accept scrap, end of life, NdFeB in most conditions to be recycled, reworked or re-processed into new magnets. Giving companies the chance to set up a clean and green end of life, waste […]

Recycling of ultrafine NdFeB waste by the selective ...

Request PDF | Recycling of ultrafine NdFeB waste by the selective precipitation of rare earth and the electrodeposition of iron in hydrofluoric acid | In this work, a simple and sustainable ...

(PDF) Recycling Decisions in 2020, 2030, and 2040—When Can ...

Recycling potentials achievable for REEs used in NdFeB magnets, namely neodymium (Nd), praseodymium (Pr), terbium (Tb) and dysprosium (Dy), were …

REE Recovery from End-of-Life NdFeB Permanent Magnet Scrap ...

Sep 20, 2016· NdFeB permanent magnets contain about 31–32 wt% of rare-earth elements (REEs). Recycling of REEs contained in this type of magnets from the End-of-Life (EOL) products will play an important and complementary role in the total supply of REEs in the future.

US20120137829A1 - Magnet Recycling - Google Patents

The present invention discloses a method for recovering rare earth particulate material from an assembly comprising a rare earth magnet and comprises the steps of exposing the assembly to hydrogen gas to effect hydrogen decrepitation of the rare earth magnet to produce a rare earth particulate material, and separating the rare earth particulate material from the rest of the assembly.

Efficient reuse of the waste sintered NdFeB magnet with ...

Sep 15, 2018· In this paper, the efficient recycling method of sintered NdFeB waste was studied. The production process can be greatly simplified by crushing the recovered waste magnet into hundreds of micron-sized magnetic powder and preparing the magnet directly with orientating, molding and sintering.

Recycling of ultrafine NdFeB waste by the selective ...

Recycling of REEs from ultrafine NdFeB waste 3.1.1. Leaching of iron from ultrafine NdFeB waste. The ultrafine NdFeB waste was identified as Nd(OH) 3, Fe 2 O 3 and Fe by XRD analyses (Fig. 1a). Therefore, the average elemental composition of the waste was given according to rare-earth hydroxides and total iron (TFe).

Recycling of Neodymium and Dysprosium from Permanent …

Recycling of Neodymium and Dysprosium from Permanent Magnets Abstract This project seeks to recycle neodymium and dysprosium from used neodymium-iron-boron, NdFeB, permanent magnets. Our alternative recycling strategy is based on a method developed by Dr. Eric Schelter of the University of Pennsylvania Department of Chemistry and his research ...

NdFeB magnet recycling: Dysprosium recovery by non ...

Apr 03, 2018· NdFeB magnet recycling: Dysprosium recovery by non-dispersive solvent extraction employing hollow fibre membrane contactor. ... J. Yu, T. MotegiThe extraction of Nd from waste NdFeB alloys by the glass slag method. J. Alloys Compd., 353 (2003), pp. 189-193. Google Scholar.

Recycling of NdFeB Magnets Using Sulfation, Selective ...

Recycling of NdFeB Magnets Using Sulfation, Selective Roasting, and Water Leaching Mehmet Ali Recai O¨nal1 • Chenna Rao Borra2 • Muxing Guo1 • Bart Blanpain1 • Tom Van Gerven2 Published online: 7 July 2015 The Minerals, Metals & Materials Society (TMS) 2015 Abstract NdFeB magnets currently dominate the magnet market.

New Service: Recycling Magnets - Magnet Sales

Magnet Sales now offers a NdFeB recycling service to help prevent the unnecessary disposal of rare earth metals. We are able to accept scrap, end of life, NdFeB in most conditions to be recycled, reworked or re-processed into new magnets. Giving companies the chance to set up a clean and green end of life, waste …

Recycling Potential of Neodymium: The Case of Computer ...

Neodymium, one of the more critically scarce rare earth metals, is often used in sustainable technologies. In this study, we investigate the potential contribution of neodymium recycling to reducing scarcity in supply, with a case study on computer hard disk drives (HDDs). We first review the literature on neodymium production and recycling potential.

Comparative Life Cycle Assessment of NdFeB Magnets: ...

Comparative Life Cycle Assessment of NdFeB Magnets: Production versus Magnet-to-Magnet Recycling ... For recycled magnet production via the magnet-to-magnet recycling process, waste EOL NdFeB magnets are collected and cleaned of impurities so they may be used as a feedstock in the recycling process. The magnet-to-magnet recycling ...

The use of hydrogen to separate and recycle neodymium–iron ...

Oct 01, 2015· With regard to recycling, option (d), much of the current stock of scrap NdFeB magnets is contained in obsolete HDDs, as the magnets used in electric vehicles and wind turbines are expected to be in service for at least 10 and 25 years respectively, and therefore as yet, unlikely to be available in significant quantities.

SCENARIO ESTIMATES OF RARE EARTH RECYCLING …

actual recycling processes were based on information from life cycle assessment studies (Sprecher et al., 2014; Walachowicz et al., 2014). The most important NdFeB application groups in terms of recycling potentials were identified. Scenario estimates for the respective percentages of heavy and light rare earth demand which can be

Hydrometallurgical Treatment of Neodymium Magnet Waste

Recycling of REEs out of end-of-life products and E-scrap has become an alternative to mining them out of primary ores due to their supply risk in some countries and the development towards circular economies. Neodymium (NdFeB) magnets are of special interest since they are present in various technological waste streams.

Estimates of global REE recycling potentials from NdFeB ...

The magnets which do not enter the recycling process (flows 2,4 and 6) are lost to other waste management routes, which can be other recycling routes not aimed at REE recovery. The distinction between alternative waste treatment routes (other than NdFeB recycling routes) is not of interest for this study.

Efficient reuse of the waste sintered NdFeB magnet with ...

Abstract In this paper, the efficient recycling method of sintered NdFeB waste was studied. The production process can be greatly simplified by crushing the recovered waste magnet into hundreds of micron-sized magnetic powder and preparing the magnet directly with orientating, molding and sintering.