Xu, L.; Zhao, B. A Fundamental Study on the Preparation of Sodium Tungstate from Wolframite via the Smelting Process. Metals2024, 14, 299.
Xu, L.; Zhao, B. A Fundamental Study on the Preparation of Sodium Tungstate from Wolframite via the Smelting Process. Metals 2024, 14, 299.
Xu, L.; Zhao, B. A Fundamental Study on the Preparation of Sodium Tungstate from Wolframite via the Smelting Process. Metals2024, 14, 299.
Xu, L.; Zhao, B. A Fundamental Study on the Preparation of Sodium Tungstate from Wolframite via the Smelting Process. Metals 2024, 14, 299.
Abstract
Tungsten is a high-value resource with a wide range of applications. The end-products of tungsten industry are tungsten metal and alloys that are produced through many steps from high-grade concentrates. Pyrometallurgical extraction of tungsten from complex and low-grade ores has great potential to overcome the problems associated with the hydrometallurgical process. In this study, sodium carbonate and silica were used to extract tungsten from wolframite at high temperatures. Sodium tungstate can be obtained directly from the smelting reaction between 1100 and 1300 oC. The smelting slag is further water-leached to recover sodium tungstate in the solution. The effects of Na2CO3/Ore and SiO2/Ore ratios, temperature and reaction time on the recovery of tungstate and the purity of sodium tungstate were systematically studied, which provides a theoretical basis for the pyrometallurgical smelting process of tungsten extraction.
Keywords
wolframite; smelting; sodium tungstate; recovery
Subject
Engineering, Metallurgy and Metallurgical Engineering
Copyright:
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
