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Meeting 2022 TMS Annual Meeting & Exhibition
Symposium REWAS 2022: Recovering the Unrecoverable
Presentation Title Leaching of Rare Earth Elements from Phosphogypsum Using Mineral Acids
Author(s) Sicheng Li, Monu Malik, Gisele Azimi
On-Site Speaker (Planned) Sicheng Li
Abstract Scope Rare earth elements (REEs) are critical metals for modern and emerging green technologies. The increasing demand and limited supply of them have sparked the research on the recovery from secondary resources. The current study is focused on developing a hydrometallurgical process for the extraction of critical REEs from waste product from fertilizer manufacture (phosphogypsum, PG), and on elucidating the mechanism of the process. Three types of mineral acids are used for the leaching, and systematic study is utilized to assess the effect of operating parameters and to determine the optimum operating conditions. The thermodynamic modeling and solubility investigation show the strong correlation between phosphogypsum solubility and leaching efficiency, and the mechanism behind the leaching process is explored. Characterization results indicate that the REEs can exist as isomorphous substitutions and/or separate phases inside PG crystal. Based on these results, destruction of PG lattice and dissolution is required to achieve improved extraction.
Proceedings Inclusion? Planned:

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Deoxidation of Titanium Using Cerium Metal and Its Oxyhalide Formation
Development of Technology for Recycling Large-capacity Lithium-ion Batteries for EV,ESS
Efficient Steel Mill Dust Recycling – Aiming For Zero Waste
Estimation of the Generation and Value Recovery from E-waste Printed Circuit Boards: Bangladesh Case Study
Extraction of Nickel from Recycled Lithium-ion Batteries
Investigation of Hydrometallurgical Recycling Parameters of WC-Co Cutting Tool Scraps
Leaching of Rare Earth Elements from Phosphogypsum Using Mineral Acids
Maximizing the Efficiency of By-product Treatment by Multi Metal Recovery and Slag Valorization
Physicochemistry of Lithium-ion Battery Recycling Processes
Pre-study of the Dissolution Behavior of Silicon Kerf Residue in Steel
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Recovery of Copper, Iron and Alumina from Metallurgical Waste by Use of Hydrogen
Recovery of Precious Metal Silver from Scrap Computer Keyboards
Recovery of Terbium, Europium, and Yttrium from Waste Fluorescent Lamp Using Supercritical Fluid Extraction
Recycling of Electronic Wastes, Waste Batteries and Rare Metal Wastes in China
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Setting New Standards for Circular Economy in the Cement Industry
Shifting the Burden of Selectivity from Chemical to Physical Separation Processes via Selective Sulfidation
Utilization of Copper Nickel Sulfide Mine Tailings for CO2 Sequestration and Enhanced Nickel Sulfidization
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