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Meeting Extraction 2018
Symposium Part C-3: Processing of Critical Metals
Presentation Title Hydrometallurgical Extraction of Rare Earth Elements from Coal Sources
Author(s) Rick Honaker, Xinbo Yang, Alind Chandra, Wencai Zhang
On-Site Speaker (Planned) Rick Honaker
Abstract Scope Rare earth elements (REEs) contained in coal and associated mineral matter exist in several forms including micro-dispersed minerals, ion adsorption onto clay surfaces, and chemically bound. Tests found that REEs can be effectively recovered from certain components of three coal sources by leaching under mild conditions followed by solvent extraction. A range of pH values were evaluated at solution temperatures of 25 degrees C and 75 degrees C. When using 1 mol/L of sulfuric acid, nearly 85% recovery of the REEs was extracted from the middlings material collected from an operating plant. Acid leaching of a second middling source from another plant resulted in 60% of the total REEs being recovered under the same leaching conditions. Solvent extraction treatment of the leachate produced from six different coal sources resulted in products containing up to 50% total REEs from feedstocks starting with around 300 ppm.
Proceedings Inclusion? Planned: At-meeting proceedings

OTHER PAPERS PLANNED FOR THIS SYMPOSIUM

A Chlorine-free Protocol for the Processing of Germanium and Tin
A Comparison Between Batch and Continuous Processes in Impurity Removal from REE Water Leach Solution by Lime and Limestone Neutralization
A Process Flowsheet for the Extraction of Niobium, Titanium and Scandium from Niocorp’s Elk Creek Deposit
Alternatives to 2-Ethylhexyl Phosphonic Acid, Mono-2-Ethylhexyl Ester for the Separation of Rare Earths
Assessment of Some Lithium Pegmatite Ore Bodies to Determine their Amenability to Processing for the Extraction of Lithium
Challenges with the Use of Lime and Limestone for Impurity Removal in Rare Earth Elements Hydrometallurgical Treatment; A Fundamental Look
Critical Materials Traceability: More Important than Metallurgy
Crystallization of a Pure Scandium Solid Phase from Solvent Extraction Strip Liquors
Development of a Metallurgical Process for Eramet's Mabouniť Nb-REE Project
Development of Scandium-Recovery Process from Titanium-Smelting Residue
Development of Sileach® Technology for the Extraction of Lithium from Silicate Minerals
Early Separation of Cerium from Mixed Rare Earths: A Review of Methods and Preliminary Economic Analyses
Efficient Recovery of Neodymium from Neodymium-Iron-Boron Magnet
Efficient Recovery of Rare Earth Elements From Coal Based Resources
Electrochemical and Frequency Assisted Separation Methods for Lithium-7 Enrichment From Liquid Media
Extraction and Purification of Rare Earth Elements and Cobalt from NdFeB Magnet Wastes
Extraction of Cobalt and Nickel from a Pyrrhotite Rich Tailings Sample via Bioleaching
Extraction of Lithium from Brine - Old and New Chemistry
Extraction of Scandium (Sc) using a Task-Specific Ionic Liquid Protonated Betaine bis(trifluoromethylsulfonyl)imide [Hbet][TF2N].
Flowsheet Development for Benefication of Lithium Minerals from Hard Rock Deposits
Fundamental Understanding of the Flotation Surface Chemistry of Rare Earth Minerals
Hydrometallurgical Extraction of Rare Earth Elements from Coal Sources
Hydrothermal Modification of Phosphogypsum to Improve Subsequent Recovery of Rare Earths
Hydrothermal Production of Lithium Metal Silicate Powders with Controlled Properties for Application to Li-Ion Batteries
Impurities Analysis of a Magnetic Waste before Leaching and Extraction of Neodymium and Praseodymium: Elaboration of Fe-Nd Alloys
Influence of substrate properties on the selective leaching performance of Co from cemented carbides
Innovative and Sustainable Valorization Process to Recover Scandium from Canadian Bauxite Residue
Innovative Coupled Hydrometallurgical and Pyrochemical Processes for Rare Earth Recycling
Leaching Kinetics of Rare-Earth Elements from Complex Ores by Acidic Solutions
Lithium and Boron Extraction from the Rhyolite Ridge Ore, Nevada USA
Lithium Extraction and Utilization: A Historical Perspective
Material Criticality: Comparing China, the EU, Japan and the USA
Natural Graphite Purification through Chlorination in Fluidized Bed Reactor
Oxidative Removal of Cerium from Rare Earth Elements Mixed Chloride Solution
Production of Purified Lithium Salts with a One-Stage Solid Phase Extraction (SPE) System
Production of Separated Rare Earth Elements (REE) from a Quebec Deposit
Radionuclide Removal from Ore and REE-bearing Minerals by Leaching and Ion Exchange Separation
Rapid and Selective Leaching of Actinides and Rare Earth Elements from Rare Earth-Bearing Minerals and Ores
Rare-Earth Elements Recovery from Nd-Fe-B Hard Magnets by Hydrometallurgical Processes
Recovery of Lithium from the Great Salt Lake Brine
Recovery of Phosphorous and Rare Earth Elements from an Apatite Concentrate
Recovery of Rare Earth Elements from Coal Fly Ash and Recovery from PLS with IX
Recovery of Rare Earths from Phosphoric Acid Production
Recovery of REEs from End-of-Life Permanent Magnet Scrap Generated in WEEE Recycling Plants
Recovery of Tungsten from Spent V2O5-WO3/TiO2 Catalyst
Recycling of Li-Ion and Li-Solid State Batteries: The Role of Hydrometallurgy
REE recovery from the fern D. dichotoma by acid oxalic precipitation after direct leaching with EDTA
Research on the Behavior of Germanium in the Leaching Process of Germanium-bearing Zinc Oxide by Sulfuric Acid
Revisiting the Traditional Process of Spodumene Conversion and Impact on Lithium Extraction
Scrap Recycling of Tungsten-Based Secondary Material for the Recovery of Tungsten Monocarbide (WC) and Other Valuable Constituents Using an Acid Leach Process: A Preliminary Study
SCRREEN - A European Expert Network on Critical Raw Materials
Selective Adsorption of Rare Earth Elements Using Polymeric Adsorbents with Diglycolamic Acid Ligands
Selective Extraction and Recovery of Rare Earth Metals (REMs) from NdFeB Magnet Grinding Sludge
Selective Extraction of Rare Earth Elements from Rich Iron Ores
Separation and Purification of Rare-Earth Elements Based on Electrophoretic Migration (Part II)
Solubility of Germanium Dioxide in Commonly Used Acids – Effect of Acid Strength, Temperature and Water Activity
Study of the Deportment of REEs in Ion Adsorption Clays towards the Development of an In-situ Leaching Strategy
Sulfuric Acid Baking and Leaching of Rare Earth Elements, Thorium and Phosphate from a Monazite Concentrate
Supercritical Fluid Extraction of Rare Earth Elements from NiMH Battery
The Simulation and Preliminary Studies on Bear Lodge Ore Flotation
Thermodynamics of Tungsten Ores Decomposition Process Options
Vanadium Extraction from Low Concentrated Iron Bearing Sources by a New Method

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