Application of the HDDR method for recycling of Nd-Fe-B magnets

Author

Szymanski, M. ; Michalski, B. ; Leonowicz, M. ; Miazga, Z.

Author_Institution

Fac. of Mater. Sci. & Eng., Warsaw Univ. of Technol., Warsaw, Poland

fYear

2015

fDate

11-15 May 2015

Firstpage

1

Lastpage

1

Abstract

In the light of tremendous technological development, rapidly grows the demand for raw materials. The Rare Earth Elements have been recognized by the US and Europe as critical ones [1]. The waste of electrical and electronic equipment becomes an urban ore - an important source of precious metals. Nd-Fe-B magnets, widely used in hard disc drives, electric motors and other devices, are considered to be very valuable for recovery because their chemical composition is based mostly on the critical elements (Nd, Dy, Pr). The HD (Hydrogen Decrepitation) and HDDR (Hydrogenation, Disproportionation, Desorption and Recombination) methods are widely tested as a prospective procedure for processing of scrap sintered Nd-Fe-B magnets into new, resin-bonded magnets [2].

Keywords

iron compounds; neodymium compounds; permanent magnets; recycling; sintering; HDDR method; NdFeB; electric motors; hard disc drives; hydrogen decrepitation; magnet recycling; rare earth elements; scrap sintering; Chemicals; High definition video; Hydrogen; Magnetic properties; Magnetic resonance imaging; Magnetic separation; Powders;

fLanguage

English

Publisher

ieee

Conference_Titel

Magnetics Conference (INTERMAG), 2015 IEEE

Conference_Location

Beijing

Print_ISBN

978-1-4799-7321-7

Type

conf

DOI

10.1109/INTMAG.2015.7156670

Filename

7156670