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Meeting 2022 TMS Annual Meeting & Exhibition
Symposium Rare Metal Extraction and Processing
Presentation Title Extraction and Recovery of Rare-earth Elements and Critical Materials from Coal Waste Using Low Cost Processing Methods
Author(s) Prasenjit Podder, Michael L. Free, Prashant K. Sarswat
On-Site Speaker (Planned) Michael L. Free
Abstract Scope Acid is an essential component for effective leaching of REEs (rare earth elements) bearing minerals and other sources. Acid can be generated using pyrite found with REE bearing materials. In the presence of A. Ferroxidans, pyrite (FeS2) is used as a source to generate ferric sulfate and sulfuric acid. Such microorganism-based bio-oxidation needs proper conditions for continuous acid generation. In this study, which involved pyrite to generate acid for leaching, a step-by-step analysis and associated details are presented. An automated bioreactor was used for bio-oxidation of pyrite of different level of purity. Morphology and elemental composition of precipitates were analyzed using scanning electron microscopy equipped with energy-dispersive X-ray spectroscopy, and the phase purity was identified using X-Ray diffraction analysis. Eh and pH measurements have been performed for different pyrite powders. FeS2 and Fe2+ reaction rate measurements were also done and pyrite usage efficiency was also estimated.
Proceedings Inclusion? Planned:

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Development of Antagonistic Solvent Extraction Systems for Selective Separation of Copper, Cobalt and Nickel in Ammoniacal Solution
Development of Molten Salt Electrolysis of MgO Using a Metal Cathode and Vacuum Distillation to Produce Ultra-high Purity Mg Metal
Development of New Extractants for Platinum Group Metal Ions in Hydrochloric Acid Solutions
Direct Synthesis of Intermetallic Compounds through Thermo-reduction and Electrochemical Deposition
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Extraction and Recovery of Rare-earth Elements and Critical Materials from Coal Waste Using Low Cost Processing Methods
Extraction Behaviors of Vanadium(V) with Unacidified- and Acidified-N1923 from a Real Leachate of Vanadium-titanomagnetite
Extraction for Neodymium from NdFeB Magnet Using Supercritical Carbon Dioxide and Organophosphorus Ligands
Extraction of Cerium, Lanthanum, and Neodymium from Alluvial Gold Mining Waste from the Bagre-Nechí Mining District in Colombia
Extraction of Rare Earth Metals from Coal Ash Using Mild Lixiviants in a Single Step Process
Fundamental Study of a Novel Electrolytic Process Using a Cu Cathode in MgF2–LiF–KCl Molten Salt for Producing Mg Metal from MgO
Low-cost Distillation Technology for Rare Earth Recycling
Method for Producing High Purity LiOH.H2O Using Ba(OH)2
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Physicochemistry in Service of Process Design: Case of Uranium Recovery by Liquid-liquid Extraction
Purification of a Low-grade Molybdenite Ore for Industrial Steel Production
Rare Earth Elements Adsorption to Gypsum in Hydrometallurgical Processes
Research Progress in Biohydrometallurgy of Rare Metals and Heavy Nonferrous Metals with an Emphasis on China
Selective Sulfidation for Rare Earth Element Separation
Study on Pre–removal Antimony from Antimony–gold Concentrate Using Slurry Electrolysis
Tellurium Recovery – Development of a Novel Hydrometallurgical Process
Two-phase Rare-earth Alloys as Reference Electrodes in Molten Chlorides for Reliable Electrochemical Measurements
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