Tungsten carbide slitting circular blade has a long working cycle as it has characteristics of high hardness, high strength, sharp cutting edge, good wear resistance, acid resistance, alkali resistance, corrosion resistance, oxidation resistance, rust resistance and high temperature resistance. The service life of such a tungsten carbide blade is more than 10 times the life of high speed steel blade. And the service life of tungsten carbide slitting circular blade after coating is dozens or even hundreds of times that of high speed steel slitting circular blade.

The researchers proposed a preparation method of ammonium paratungstate (APT) using tungsten-contained soft waste material. And the obtained APT can be directly used in the production of tungsten alloys or be applied as additives for chemical products.

The researchers proposed a new process for recovering ammonium tungstate from APT crystallization mother liquor. This process improved the existing problems of high consumption of auxiliary materials, high production cost and large energy consumption in the prior art.

Researchers have proposed a method for producing ammonium paratungstate using tungsten-contained waste material, which has the advantages of short production process. Evaporated and crystallized waste ammonia gas and wastewater can be recycled and reused. And it significantly reduces emissions of waste gas and wastewater. Also, it improves the tungsten recovery rate.