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Meeting 2021 TMS Annual Meeting & Exhibition
Symposium Rare Metal Extraction & Processing
Presentation Title Uranium and Thorium Removal from Rare Earth Sulfate Solutions by Ion Exchange and Solvent Extraction
Author(s) David Dreisinger, Mike Johnson, Niels Verbaan, Greg Andrews
On-Site Speaker (Planned) David Dreisinger
Abstract Scope The Search Minerals Direct Extraction Process involves direct acid treatment of crushed ore, water leaching and neutralization for iron and impurity removal and mixed carbonate precipitation. The rare earth carbonate is redissolved in sulfuric acid and treated by pH adjustment to remove silica and aluminum followed by ion exchange for uranium removal and solvent extraction for thorium removal. The treated solution is then sulfidized to remove zinc and subsequently processed to make either a mixed oxide rare earth or a mixed carbonate rare earth product for separation into high purity individual rare earths. The bench and pilot plant processing of rare earth sulfate solutions derived from the Foxtrot Deposit for uranium and thorium removal is described.
Proceedings Inclusion? Planned:

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Effect of Synthesis Method on the Electrochemical Performance of LiNixMnCo1-x-yO2 (NMC) Cathode for Li-ion Batteries: A Review
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Experimental Determination of Liquidus Temperature and Phase Equilibria of the CaO-Al2O3-SiO2-Na2O Slag System Relevant to E-waste Smelting
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Extraction of Platinum Group Metals from Spent Catalyst Material by a Novel Pyro-metallurgical Process
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Extraction of Zn, Ga, Ge and In from Zinc Plant Residues
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Innovative Reactors for Recovery of Rare Earth Elements (REE)
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Lithium Adsorption Mechanism for Li2TiO3
Preparation of High-grade Ammonium Metatungstate (AMT) as Precursor for Industrial Tungsten Catalyst
Rare Earth Elements Extraction from Coal Waste Using Biooxidation Approach
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Recovery of Valuable Metals from End-of-life Lithium-ion Battery Using Electrodialysis
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Rethinking Mineral Processing and Extractive Metallurgy Approaches to Ensure a Sustainable Supply of High-tech and Critical Raw Materials
Scandium Extraction from Bauxite Residue Using Sulfuric Acid and a Composite Extractant-enhanced Ion-exchange Polymer Resin
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Selective Separation of Co and Ni from REE in Recycling
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Study of the Recovery of Rare Earth Elements from Ion Adsorption Clays through Perolation Leaching Processes
Study on the Enhancement of Iron Removal in the Becher Aeration by a Novel Tubular Reactor
Study on the Production of Lithium by Aluminothermic Reduction Method
Supercritical Extraction of Neodymium from NdFeB Magnet Using Organophosphorus Ligands
The Importance of Spodumene Decrepitation on the Lithium Sulfate Extraction
The Italian National Research Council Operations within the EIT Raw Materials Framework
Tool and Workflow for Systematic Design of Reactive Extraction for Separation and Purification of Valuable Components
Understanding the Feasibility for Secondary and by Product Sources to Supply Rare Earth Metals
Uranium and Thorium Removal from Rare Earth Sulfate Solutions by Ion Exchange and Solvent Extraction

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