Although tungsten carbide has platinum-like catalytic performance and strong anti-CO poisoning ability, its dispersibility is poor, its specific surface area is small, it is easy to agglomerate, and its conductivity is poor, and its catalytic activity is not ideal. Compared with platinum and other noble metal catalysts, there is still a big gap.

In the process of scheelite flotation, a large amount of sodium silicate was added as gangue inhibitor or dispersant. The presence of sodium silicate makes it difficult to clarify tailings water, especially for a large number of fine suspended solids to settle under gravity.

The results show that the one-dimensional tungsten oxide nanostructures have large specific surface area, surface activity and strong gas adsorption capacity, which can accelerate the reaction between gases, further improve the sensitivity and effectively lower the working temperature. In order to obtain such a high performance gas sensor, the first step is to prepare nanomaterials that can meet these requirements.

In the traditional recovery and treatment of waste tungsten powder, the powder waste tungsten powder is first oxidized into tungsten oxide, and then tungsten oxide is dissolved by alkali to form tungstate. In this way, not only the process is complex, but also the efficiency is very low. The oxidation rate of waste tungsten powder is usually less than 50%. Unoxidized tungsten powder needs to be recycled by other methods again.