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http://dx.doi.org/10.7844/kirr.2018.27.6.3

Hydrometallurgical Processes for the Recovery of Tungsten from Ores and Secondary Resources  

Ahn, Hyeong Hun (Department of Advanced Material Science & Engineering, Institute of Rare Metal, Mokpo National University)
Lee, Man Seung (Department of Advanced Material Science & Engineering, Institute of Rare Metal, Mokpo National University)
Publication Information
Resources Recycling / v.27, no.6, 2018 , pp. 3-10 More about this Journal
Abstract
Tungsten is a metal with high melting point and used as a raw material for the production of super alloys. Tungsten exists as $WO{_4}^{2-}$ in alkaline solution. As solution pH decreases, polymerization reaction of $WO{_4}^{2-}$ occurs to result in the precipitation of tungstic acid. The hydrometallurgical process for the recovery of tungsten from ores or secondary resources can be classified as acid and alkaline leaching. In selecting a process for the recovery of pure tungsten from secondary resources, the nature and concentration of impurities in the secondary resources and the manufactured tungsten materials should be considered.
Keywords
Tungsten; super alloys; hydrometallurgy; recovery;
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