REE Extration.pptx Ni extraction. pptx ppt presentation

REE Extration.pptx Ni extraction.pptx

1. Introduction to REE Wikipedia photo = Assortment of lanthanide group elements. Scandium Wikipedia photo = Gibe, free documentation license Yttrium Wikipedia photo = Tomihahndorf , free documentation license Periodic table of the elements showing the division between LREEs and HREEs (Schuler et al., 2011 ).

2. Rare Earth Element Applications

3. Rare Earth Elements’ Processing Current and Emerging Technologies, and evolving needs within the Manufacturing Sector, Workshop B: Resource efficiency: production, reuse, recovery, recycling > Session B1: Materials and processes for environmentally sound, economical separation of rare earths in diverse ore bodies and recycling streams (Tuesday, October 4, 2011 15:00-18:00) > Organic solvents > Supercritical solvents > Membranes > Biological processes > Ion exchange The next slides are: 1. A view of a solvent exchange facility in Baotou, China, and 2. A (Solid Phase Exchange) column used to separate and purify REEs. A bench-top SPE separation system

4. REE Extraction methods solvent exchange facility in Baotou . A (Solid Phase Exchange) column used to separate and purify REEs. A bench-top SPE separation system

5. REE chlorides La purification column Water LaCl 3 NaCl REECl 3 Separation of Ce, La, Pr, Nd, Eu, Dy, Tb Chelating column Ce purification column Water REECl 3 Ce(OH) 4 NaCl 0.35% HCl 10% Na 2 CO 3 Acid recycle Pr+Nd+Eu+Dy+TbCl 3 Water PrCl 3 Pr+Nd+Eu+Dy+TbCl 3 raffinate Dy +TbCl3 Chelating column Water PrCl 3 Pr+Nd+Eu+Dy+TbCl 3 raffinate Dy +TbCl3

6. REECl 3 Separation (cont’d) Pr Chelating column Water PrCl 3 Nd+Eu+Dy+TbCl 3 raffinate Dy +TbCl3 Water Dy+TbCl 3 raffinate TbCl3 Nd Chelating column (3 times) Water NdCl 3 Eu+Dy+TbCl 3 raffinate Dy +TbCl3 Eu Chelating column (3 times) EuCl 3

7. Chelating column (3 X) Water TbCl 3 DyCl 3 Dy +TbCl3 raffinate

8. Hydrogen Decrepitation: Sintered NdFeB Magnets Multi-Step Process 9 High-value recovered magnet powders 1. Used as a primary alloy feedstock 2. Processed for re-sintering into commodity grade magnets

9. Thanks