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 carbide (WC) is a black hexagonal crystal with metallic luster and similar hardness to diamond. Since Levy R B first pointed out that tungsten carbide has platinum-like (Pt) catalytic effect in 1973, researchers began to try to use tungsten carbide instead of noble metal catalysts in heterogeneous catalysis and electrocatalysis.

The tungsten-containing soft waste referred to in the recovery and treatment of tungsten wastes is a kind of soft waste such as leaching residue in the production process of ammonium metatungstate (AMT), ammonium paratungstate flooring material and yellow tungsten flooring material, air pipe material, ammonium paratungstate evaporation mother liquor produced in the production process of tungsten oxide. Inevitably, tungsten still exists in these tungsten-containing wastes. It can be recycled.

China is a large tungsten-producing country, with more than 20,000 tons of crude tungsten products exported every year. 50% of the tungsten used by the world's major industrial countries is supplied by China. The output of pure tungsten metal products in China is about 1,000-1,200 tons, and the output is also in the forefront of the world. However, in terms of production technology and intellectual property rights of high-quality tungsten materials, China's quantity is rare.