The composition of tungsten waste is complex, difficult to extract and complicated to remove. This kind of APT is manufactured by traditional method with long technological process, narrow adaptability of raw materials, large investment in equipment, unstable products and poor economic benefits. In recent years, the preparation of ammonium paratungstate from tungsten waste has been explored and some results have been achieved.

Electrical contacts are the key components of switchgear, which bear the function of conducting current. Their performance directly affects the reliability and service life of switchgear. Therefore, switchgear requires electrical contacts to have good conductivity and thermal conductivity, low contact resistance and temperature rise, high resistance to fusion welding and electrical erosion.

There has always been a low (poor) grade tungsten-tin associated ore in the tungsten-tin production industry, which is particularly common in Yunnan. Because the material and chemical properties of the two metal compounds are similar, the separation of the two metals in the industrial production process has always been a difficult problem that puzzles the industrial production technology. The traditional production method has been characterized by high pollution and high energy consumption, which makes it difficult to conform to the national industrial policy.

Tungsten oxide nanowires are a kind of magical one-dimensional material, which can also be used to absorb radar electromagnetic wave, such as stealth fighter coatings, strategic missile concealment and so on.