For a long time, China's tungsten concentrate mining is dominated by wolframite ore resources, and the output once accounted for more than 90% of tungsten concentrate production. At present, the reserves of wolframite ore have been depleted, and the replacement of black tungsten ore with scheelite concentrate is of great significance and imminent. 

Tungsten oxide is a new type of semiconductor material and one of the few oxide semiconductors which are easy to achieve quantum size effect. It has the characteristics of electrochromic, absorption and catalysis. It has been widely used in fuel cells, chemical sensors, optoelectronic devices and other fields.

Tungsten has the advantages of high melting point, high strength, high hardness and high wear resistance. In addition, it has low thermal expansion coefficient, good corrosion resistance and oxidation resistance, and good conductivity and thermal conductivity. Therefore, tungsten has been widely used in cutting-edge scientific fields, national defense industry and civil industry.

Tungsten carbide (WC) has been widely used in catalysis because of its platinum-like catalytic activity, high hardness, high thermal stability and good wear resistance. As a catalyst, WC has not only good catalytic activity for hydrogenation and dehydrogenation, but also selective catalysis for some reactions.

Ammonium paratungstate is an important intermediate product in tungsten hydrometallurgical process. The production process of tungsten concentrate decomposition-ammonium paratungstate mainly includes ore decomposition, transformation to obtain crude ammonium tungstate solution, impurity removal from crude ammonium tungstate solution, crystallization to obtain ammonium paratungstate and crystallization mother liquor, recycling of crystallization mother liquor, etc.

Foamed metal tungsten is a kind of material with double properties of function and structure. It has certain strength, high temperature resistance and corrosion resistance, and has low density, high porosity and large surface area. It is widely used in modern defense and military, atomic energy, aeronautical and aerospace, electronic information and other fields.

Molybdenum and tungsten resources are China's dominant resource minerals. China's reserves of molybdenum and tungsten resources, mining and processing volume, and trade volume occupy an important position in the world, while tungsten is in the first place. Tungsten mainly exists in the form of black tungsten and scheelite. The scheelite often contains a certain amount of molybdenum, which is usually in the form of molybdenum sulfide, which can be separated by conventional flotation methods. The tungsten resource containing molybdenum oxide is difficult to process. It is rarely used.

China's reserve of scheelite-fluorite associated ore is in enormous quantity. This type of ore presents in fine-grained inlays, complex ore composition, and symbiotic with a variety of minerals such as sulfide ore and calcite. calcium-bearing mineral scheelite-fluorite-calcite has a difficulty in flotation, the traditional scheelite flotation process is not good for subsequent fluorite flotation, and the fluorite extraction rate is not high.

Tungsten-tin ore is brittle and easy to over-grind during the grinding process, which causes some tungsten-tin ore to be muddy during the grinding process. It is difficult to re-elect the fine-grained tungsten-tin ore. At the same time, both black tungsten ore and cassiterite are minerals that are difficult to float, which are more demanding on flotation reagents and flotation conditions. The flotation process recovers tungsten tin ore flotation reagents, which consumes a lot of money and has high production costs and not suitable for flotation.

Ammonium paratungstate (APT) is an important intermediate in tungsten metallurgy and tungsten chemicals. The common material to prepare APT is a crude sodium tungstate solution obtained by treating a tungsten raw material (including a mineral raw material and a secondary raw material). The crude solution mainly contains sodium tungstate Na₂WO₄, and impurities such as NaOH, P, As, Si, Sn and so on.