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Meeting 2016 TMS Annual Meeting & Exhibition
Symposium Rare Metal Extraction & Processing Symposium
Presentation Title Production of Tungsten by Pulse Current Reduction of CaWO4
Author(s) Furkan Özdemir, Metehan Erdoğan, İshak Karakaya, Mustafa Elmadağlı
On-Site Speaker (Planned) Furkan Özdemir
Abstract Scope Tungsten is mainly produced by hydrogen reduction of WO3 which makes its production difficult and costly. A promising method was recently reported for direct electrochemical production of tungsten from CaWO4 (scheelite) which is estimated as the seventy percent of the all tungsten reserves of the world. This paper investigates the application of pulse current in the electrochemical reduction of CaWO4 pellets attached to current collector. The electrolyte was composed of calcium chloride and sodium chloride salts at eutectic composition (48 pct mol NaCl at 873 K). Reduced samples were cleaned with dilute hydrochloric acid solutions and characterized by X-ray diffraction and scanning electron microscopy. Examination of the results revealed that metallic tungsten was obtained with a higher yield and increased energy efficiency by pulse current compared to constant current reduction.
Proceedings Inclusion? Planned: A print-only volume

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Fluorination Behavior of Uranium and Zirconium Mixture for Fuel Debris Treatment
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Investigation of Iron Removal from Reduced Upgraded Titania Slag Using Mild Acids
Preparation and Analysis of Nd2O3 Doped Apatite Concentrate for Pyrometallurgical Recovery of Rare Earth Element
Production of Tungsten by Pulse Current Reduction of CaWO4
Recovery and Purification of In3+ from Zinc Hydrometallurgical Process in a T-junction Microchannel
Recovery of Yttrium and Neodymium from Copper Pregnant Leach Solutions by Solvent Extraction
The Search Minerals Direct Extraction Process for Rare Earth Element Recovery
U-1: Thermal Decomposition of Acid Strontium Oxalate
U-2: Treatment of a Complex Rare Earth-niobium-iron Associated Ore by a Novel Metallurgical Process
U-3: Upgrading Platinum from Spent Alumina-supported Catalyst by a Roast-leaching Process

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