my country is rich in ammonium paratungstate resources and is an important exporting country.

Ammonium paratungstate is mainly used in the manufacture of tungsten trioxide, metal tungsten powder and other products. It is used to produce tungsten wires, tungsten strips and other electric vacuum materials; tungsten carbide, alloy molds and other alloy products; it can also be used as a petrochemical additive. The upstream raw materials of ammonium paratungstate…