The chromism and coating quality of tungsten nickel alloy target produced by the existing technology are still not stable enough, resulting in low yield and high cost of electrochromic glass, more wastes such as waste acid and other pollutants are produced.

In order to optimize the technological process, energy saving and emission reduction, the researchers put forward a far infrared hot press decomposition of tungsten mineral raw materials to achieve a clean production process for the full decomposition of tungsten minerals in wet tungsten smelting. The characteristics of the process are as follows:

Separation of tungsten and molybdenum has been the focus of tungsten and molybdenum smelting technology research and development. Some researchers have proposed a method of extraction and separation of tungsten and molybdenum by extraction and separation of ammonium tungstate solution by N263- paraoctanol - kerosene system, which consists of 20% N263, 20% isooctanol and 60% kerosene, O/A=1:1.

The traditional tungsten concentrates bake converter is heating through the drying oven. The main fuel of the oven is coal or dry wood. This drying method shows the following shortcomings in the production practice: first, it causes environmental pollution and consumes a lot of wood; Second, it is that both coal and dry wood need a larger fuel yard, and the effect is affected.