Among all kinds of renewable energy and clean energy, hydrogen energy is one of the ideal clean energy. It has the advantages of high combustion efficiency, rich resources, no pollution and relatively cheap cost. Hydrogen has a variety of preparation methods. Hydrogen production by electrolysis is the most commonly used method at present. In order to make hydrogen production by electrolysis water, For commercial applications, hydrogen evolution catalyst materials with high catalytic activity must be developed.

Tungsten electrodes are the key materials used in inert gas shielded welding and plasma welding, cutting, spraying and other equipment. At present, thorium and tungsten electrodes (including ThO₂) and cerium tungsten electrodes (including CeO₂) are used more. In addition, a small amount of lanthanum tungsten electrodes and yttrium tungsten electrodes are used.

The processing technology of the traditional tungsten ore is ore crushing and grinding. The wolframite concentrate is obtained through the shaking table and strong magnetic field. The scheelite concentrate is obtained by flotation and Petrov method. When the traditional method is used to deal with tungsten ore with more than 30% carbonate content, the ideal index can not be obtained many times, and the ratio of useful metals remaining in the tungsten tailings is still large.

At present, in the process of producing ammonium tungstate solution by tungsten mine, the technology of separating P, As, Si and Mo from tungsten ore to produce high pure ammonium tungstate solution has the classical chemical method, the current extraction method and the ion exchange method. The current extraction process is the free alkali in the inorganic acid neutralization solution, the silicate hydrolysis, most silicon is removed by silicic acid precipitation, then the P, As and the remaining silicon are removed by the magnesium salt or ammonium magnesium salt, and the Mo is separated by the precipitated MoS₃ method, and the purified sodium tungstate solution.