Pressure leaching and water leaching are two mature methods for industrial leaching of tungsten from tungsten ore. The leachate obtained by the above two leaching methods is a mixed solution of sodium tungstate and sodium carbonate, which usually contains a small amount of impurities such as P, As, Si, etc. and this solution is a soda leaching solution containing a tungsten material.

In ore deposits, tungsten is more or less symbiotic with minerals such as tin, copper, antimony, bismuth or molybdenum. Tungsten ore is separated by gravity concentration method, froth flotation method, or gravity concentration-froth flotation process. However, for the associated tungsten in the complex tin concentrate, it is difficult to separate by using the conventional ore separation methods. When the tin concentrate containing ≥1%, the high melting point of tungsten will affect the smelting of tin concentrate.

Tungsten is a very important non-ferrous metal. It has a series of properties such as high density and high strength. It is commonly used in counterweight materials, shielding materials, military firing materials, semiconductor materials, etc.

Environmental pollution is a major challenge facing by humans today. The use of photocatalytic technology to control environmental problems is one of the most active research fields. Finding high-efficiency photocatalysts is a top priority in this field. Bismuth tungstate (Bi2WO6) photocatalyst is considered to be a potential excellent visible light catalytic material due to its unique electronic structure, excellent visible light absorption capacity and high organic matter degradation ability.