Rare Earth extraction;Rare Earth;Molten Salt Electrolysis;NdFeB Magnet Scrap

Categories:
Categories:
Unit processes/Materials production/Metals and semimetals
Location:
CN - China
Reference year: 2013 - 2016
Description

The process is designed for the recovery of rare earth metals, specifically neodymium (Nd) and praseodymium (Pr), from NdFeB magnet scrap. This process is applicable in the recycling sector, targeting the extraction and production of Nd-Pr alloy, which is critical in manufacturing high-strength permanent magnets used in various advanced technological applications, such as electric motors, wind turbine generators, and hard disk drives. When utilizing this data, users should consider the experimental nature of the process, currently developed at a laboratory scale. Applicability for scaling up to industrial levels may require consideration of technological adaptations and efficiency changes. The updated allocation of environmental flows to Nd and Pr based on value allocation reflects the economic considerations given to byproducts during the beneficiation and solvent extraction stages. The instructions also highlight the necessity of separately modelling the allocation for multi-output stages accurately based on recent data (2013–2016). Users should ensure the functional unit—production of 1 kg Nd-Pr alloy from NdFeB magnet scrap—is consistent with the goal and scope of their assessment.

Technology

The one-step recycling process to extract rare earth metals from scrap magnets is being developed on a laboratory scale at TU Delft. Nonmagnetized, uncoated magnet samples were used in the experiment. The magnets were ball milled under inert atmosphere to increase the surface area to facilitate the electrochemical reactions, and the powder was inserted into the salt bath.

Process type
Unit
LCI modeling approach
Attributional
Multifunctional modeling
NONE
Format
ILCD
Aggregation type
NOT_APPLICABLE
Data provider
TianGong
Review status
Internal
Cost
Free
Contact
Tiangong LCI Data Working Group