Cemented-carbide grinding material not only contains a considerable amount of tungsten, but also a small amount of cobalt and nickel and other valuable metals, which can realize comprehensive utilization of secondary resources of tungsten if it is recycled. Currently, as for recovery process of the metal of such waste-tungsten materials there are some common methods, such as oxidation-alkali leaching, saltpetre melting, sodium-sulphate-melting, and so on. The saltpetre smelting and sodium-sulphate-smelting methods has the disadvantages of high-energy consumption and impurities, so oxidation - alkali leaching method is generally used.

In the early tungsten’s extraction, sodium hydroxide was used only to decompose wolframite and did not apply to decomposite scheelite. However, in 1985 Li Honggui's team proposed that alkali hot ball-milling to decompose scheelite and changed the view that sodium hydroxide can’t decompose scheelite thoroughly. However, the method has high equipment-dependence, serious abrasion and salient safety problems.

With the development of microelectronics technology, the requirements of material are higher and higher. According to the famous Moore's Law, when the price is constant, the number of transistors that can be accommodated in an integrated circuit will be doubled about every 24 months, which means that with the substantial increase in unit volume of power, the heat is also greatly increased. According to the U.S. Air Force's investigation, over 70% of the invalidity of electronic components is related to over-heat, and therefore heat-sink material is crucial for microelectronic devices.

Tungsten copper alloy is a kind of alloy composed of tungsten and copper. Because tungsten and copper are completely immiscible, it is a two-phase alloy. It combines high melting point and low coefficient of thermal expansion of tungsten, and high thermal conductivity and high electrical conductivity and other properties of copper, so it is an excellent heat-sink material.

Ion exchange process has become China's chief tungsten smelting process. With the advancement of technology and the improvement of environmental-friendly awareness, most tungsten smelting enterprises have already attached importance to the treatment of effluent wastewater and the improvement of the total recovery of tungsten, especially for the recycling of tungsten in the crystallizing mother liquor and the treatment of ammonia nitrogen. In general, the recovery of tungsten and ammonia in the crystallizing mother liquor treated by independent process respectively.

Ultra coarse tungsten powder is the main raw material for production of coarse grained cemented carbide and its downstream products are widely used in the field of mining tools, stamping die, oil drilling, hard material etc..

Hollow spheres refer to a hollow nanomaterials. Because this kind of material has low density, large surface area, good stability and has the characteristics of surface permeability, so both in chemistry, biology and material science applications, porous hollow spheres and hollow spheres formed by stacking have great potential application value in the field of catalysis coating protection slow release, drug packaging, artificial cell simulation and protein, enzyme, DNA and other bioactive molecules as well as coating or paint etc..

The removal of impurities plays a vital role in the quality of tungsten products in the process of tungsten smelting. As an element similar to tungsten, vanadium is associated with tungsten ore, and it is difficult to separate tungsten and vanadium. In recent years, the raw materials of high grade and high quality tungsten ores have been reduced, and the low grade ore and refractory ores with high impurity content have been increased, the problem of separating impurity elements from tungstate is becoming more and more important, and the separation of vanadium, as an impurity element, is also particularly important.

With tungsten oxide as catalyst active component, because of its acidity and redox properties and is widely used in the selective oxidation of olefins, alkanes isomerization, the selective reduction and other reactions of nitrogen and oxygen compounds. In addition, as a photocatalyst WO₃ has many potential applications, such as energy conversion, virus inactivation, organic pollutant degradation, and so on.

In recent years, metal rhenium compounds have attracted much scientists' attention and research in the field of catalytic application. There are two main reasons: first, the multiple valence states of rhenium provide a precondition for the formation of various stable rhenium compounds. Second, most rhenium compounds are inert to water and oxygen, so they are easily controlled in the organic catalytic reaction.

Tungsten heteropoly acid is a kind of nano scale inorganic cluster which is determined by structure. Especially the tungsten heteropoly acid with Keggin structure is stable and has both acid and redox property. It can be used to design different functional catalysts and is very popular. Its superior catalytic performance is mainly embodied in petrochemical industry, sewage treatment and light industry.