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Meeting 2022 TMS Annual Meeting & Exhibition
Symposium REWAS 2022: Poster Session
Presentation Title KIGAM Technology for the Recovery of NdFeB Waste Magnet and Manufacturing Scraps
Author(s) Kyeong Woo Chung, Ho-sung Yoon, Chul-joo Kim, Rina Kim, Byunchul Lim
On-Site Speaker (Planned) Rina Kim
Abstract Scope At KIGAM, the pilot plants have been developed and demonstrated two processes for recycling NdFeB waste magnets and manufacturing scraps. The former process uses thermal oxidation as a pretreatment before. The latter does caustic digestion and the thermal oxidation process. About 35% of the iron in feed was co-leached with REEs upon leaching of thermally oxidized products. Therefore, the separation process of REEs and non-REEs was carried out using the double-salt precipitation method to produce a high purity REEs solution applicable for solvent extraction. Instead, the leaching yield of iron upon leaching of caustic digestion and thermal oxidation products showed a value of 0.01%. Thus the high purity REEs solution was obtained and directly applied to solvent extraction. Finally, REEs-compounds of 99.9% or above could be obtained by solvent extraction using mixer settler and precipitation from raffinate and stripping solutions.
Proceedings Inclusion? Planned:
Keywords Recycling and Secondary Recovery,


Advanced Process of Waste Glass Bottle for the Production of Recycled Glass Aggregate and Cullet
Fe-Si Alloy Preparation and Alumina Extraction from Red Mud and Silica Fume via Vacuum Carbothermal Reduction
Geopolymers Made of Construction and Demolition Waste: Current Trends and Perspectives
KIGAM Technology for the Recovery of NdFeB Waste Magnet and Manufacturing Scraps
Recovery of Lithium from Black Cathode Active Materials of Discarded Lithium-ion Batteries (LIBs)
Recovery of Rare Earth Elements from Nd-Fe-B Magnet through Selective Chlorination Using Zinc Chloride
Recycling of Automobile Discarded Ceramic Converters for Pt-group Metals’ Recovery through Pressure CN-leaching
The Research Status and Progress on the Utilization of Coal Fly Ash: A Review

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