|About this Abstract
||2016 TMS Annual Meeting & Exhibition
||Rare Metal Extraction & Processing Symposium
||Production of Tungsten by Pulse Current Reduction of CaWO4
||Furkan Özdemir, Metehan Erdoğan, İshak Karakaya, Mustafa Elmadağlı
|On-Site Speaker (Planned)
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.
||Planned: A print-only volume