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Meeting 2020 TMS Annual Meeting & Exhibition
Symposium Rare Metal Extraction & Processing
Presentation Title Application of Microwave Pretreatment for Rare Earth Element Recovery from Phosphogypsum
Author(s) Adrian Lambert, John Anawati, Mugdha Walawalkar, Jason Tam, Gisele Azimi
On-Site Speaker (Planned) Adrian Lambert
Abstract Scope The increasing importance of rare earth elements (REEs) in modern electronics and green energy applications, coupled with rising geopolitical supply risks, has generated interest for developing secondary REE supply chains. Phosphogypsum (PG), a waste from fertilizer production containing 0.03 – 0.4 wt% REEs, is identified as a secondary resource for REEs. Here, a novel process utilizing microwave pretreatment was developed to increase PG porosity by heating and releasing water therein, improving lixiviant diffusion into the PG particles. Optimal microwave conditions were found at low power and short duration (600 W, 5 min), which increases PG porosity with minimal conversion of gypsum to less soluble phases, and at high power and long duration (1200 W, 15 min), in which thermal PG degradation and REE release occur at the expense of gypsum conversion to less soluble phases. The highest REE extractions (80% Nd, 99% Y, 99% Dy) were achieved with the latter.
Proceedings Inclusion? Planned:

OTHER PAPERS PLANNED FOR THIS SYMPOSIUM

A Fundamental Investigation of Li2CO3 Crystallization from Li2SO4 System
An Innovative Process for Extracting Scandium from Nickeliferous Laterite Ore
Application of Microwave Pretreatment for Rare Earth Element Recovery from Phosphogypsum
Co-precipitation of Impurity (Ti, Fe, Al, Zr, U, Th) Phases during the Recovery of (NH4)3ScF6 from Strip Liquors by Anti-solvent Crystallization
Development of a Physiochemical Model Combined with an Engineering Model for Predicting Solvent Extraction Performances within the Context of Lithium-ion Battery Recycling
Electrodialysis in Hydrometallurgical Proceses
Extraction of Rare and High-valued Metals from Blast Furnace Dust
Impurity Uptake during Cooling Crystallization of Nickel Sulfate
Indian Coal Ash: a Potential Alternative Resource for Rare Earth Metals (REMs)
Leaching of Eudialyte –The Silicic Acid Challenge
M-80: A Novel Depressant of Sodium Polyacrylate for Magnesite Flotation
M-82: PRICE - PRocess Industries in the Circular Economy
Molecular Recognition Approach to REE Extraction, Separation and Recycling
Optimizing Zr and REE Recovery from Zircon through a Better Understanding of the Mechanisms Governing its Decomposition in Alkali Media
Potential of a Nigerian Cassiterite Ore for Industrial Steel Coatings
Reclamation of Precious Metals from Small Electronic Components of Computer Hard Disks
Recovery of Manganese and Cobalt from Discarded Batteries of Toys
Recovery of Platinum Group Metals from Secondary Sources by Selective Chlorination from Molten Salt Media
Recovery of Rare Earths from Waste Permanent Magnets Leach Liquors
Recovery of Strategic Materials from Canadian Bauxite Residue by Smelting Followed by Acid Baking – Water Leaching
Recycling of End-of-life Lithium-ion Battery of Electric Vehicles
Review on Removal of Impurities from REE Processing Solutions
Secondary and Byproduct Sources of Rare Earth Metals
Selective Lithium Recovery from Brines Using Hydrothermally Treated Titania Slag
Selective Recovery of Scandium from Nickel Laterite Ore by Acid Roasting - Water Leaching
Separation of Neodymium and Dysprosium by Molten Salt Electrolysis Using an Alloy Diaphragm
Supercritical Fluid Extraction of Rare Earth Elements from a Canadian Ore
Supercritical Fluid Extraction of Rare Earth Elements from Waste Fluorescent Lamp
The Dynamics of the Circular Economy of Rare Earth Elements
The Iron Precipitate from Primary Zinc Production – A Potential Future Source for Indium and Silver

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