In recent years, with the development of industrialization and the rapid improvement of people's living standards, environmental pollution has become the main problem facing human beings, especially water pollution, which has attracted more and more attention. Industrial waste water accounts for a large part of the water pollution sources. Because of its dark color and strong toxicity, it is difficult to treat.

Violet tungsten oxide with good reducibility and high hydrogen reduction rate is used to prepare ultrafine tungsten powder, so as to obtain high-quality tungsten carbide powder. Carbonization is an extremely important procedure in the preparation process.

To produce tungsten powder from ammonium paratungstate, it is usually necessary to first burn tungsten oxide in a weak reducing atmosphere, and then carry out hydrogen reduction to produce tungsten powder. Most of the tungsten powders prepared by this process are very regular polycrystalline, which are the main raw materials for the preparation of tungsten alloy and tungsten carbide.

With high chemical activity and hydrogen reduction rate, violet tungsten oxide has become a significant raw material for preparing tungsten carbide powder. High-quality tungsten carbide powder is usually prepared by carbonization of ultra-fine tungsten powder, which is obtained from violet tungsten oxide.