Tungsten electron emitter is a key material for vacuum electronic components, inert gas shielded welding, plasma welding, cutting, spraying, smelting and special electro-optic sources. At present, the most of the materials are thorium and tungsten and cerium tungsten materials.

Tungsten electrode material is one of the key materials used in tungsten inert gas protection welding and plasma technology. With the development of high and new technology, the properties of tungsten electrodes are becoming higher and higher in the fields of mechanical electronics, petroleum, chemical, aerospace, ship, atomic energy and other fields. The tungsten yttrium electrode has long life, long arc beam and compression. It is popular because of its large degree and good arc performance.

With the continuous development of cemented carbide industry, the demand for tungsten carbide is increasing. The tungsten carbide powder prepared by the traditional method has a high aggregation degree, which is liable to cause the larger average particle size and the smaller particle size. As a result, the difficulty in manufacturing high-quality cemented carbide is increased, making it difficult for the cemented carbide products to achieve a high degree of uniformity in wear resistance and toughness.

In the existing technology, the production of ammonium para tungstate is not recycled, and the consumption of auxiliary materials is large, and the environmental pollution is heavy. The main reason is that a large amount of high salt waste liquid is produced during the transformation process of tungstate solution, and the evaporation crystallization mother liquor is difficult to recycle economically and produce ammonia nitrogen wastewater. In the existing technology, if the enterprise is changed to "cycle" model, then the enterprise will lose money, so the tungsten metallurgical enterprises all over the world have to choose sewage discharge.