Your browser is no longer supported

For the best possible experience using our website we recommend you upgrade to a newer version or another browser.

Your browser appears to have cookies disabled. For the best experience of MRW, please enable cookies in your browser

We'll assume we have your consent to use cookies, so you won't need to log in each time you visit our site.
Learn more

  • You are here:Kit

Acid-free dissolving to get at rare-earths

A rare-earth magnet recycling process developed by the US based Critical Materials Institute (CMI) – led by Ames Laboratory – can dissolve magnets in an acid-free solution and recover high-purity rare-earths.

For shredded magnet-containing electronic wastes such as computer hard drives, the process does not require pre-sorting or demagnetisation.

Rare-earths are vital to many technologies and are critical ingredients in the world’s strongest magnets, but they are subject to supply shortages. Recycling until now has faced serious economic and ecological challenges.

Lead researcher Ikenna Nlebedim said: “The difficulty with traditional hydrometal-lurgical methods for rare-earth magnet recycling is that they rely on the use of hazardous mineral acids. This produces toxic fumes, the acids need to be contained and so do acid-contaminated wastes.”

The new process has been adapted for the recovery of rare-earths from both neodymium-iron-boron and samarium-cobalt magnets. Other valuable by-products of WEEE can be recovered for recycling including copper, chromium, nickel, other metals or their composites.

Science Daily http://bit.ly/2jjKIJt

Have your say

You must sign in to make a comment

Please remember that the submission of any material is governed by our Terms and Conditions and by submitting material you confirm your agreement to these Terms and Conditions. Links may be included in your comments but HTML is not permitted.