Selective catalytic reduction (SCR) technology and its key equipment denitration catalyst industry have been vigorously developed for the treatment of thermal power plants. Vanadium tungsten (molybdenum) titanium catalyst is the most widely used SCR denitration catalyst in SCR technology.

The main method of producing super coarse grained cemented carbide is the use of super coarse tungsten carbide powder and cobalt powder as raw materials. It is pressed and sintered to become a product after batching, ball milling, drying and granulation. However, the ultra coarse tungsten carbide powder will break in the process of ball milling, and the grain size will decrease greatly. During the sintering process, the WC grain can not grow into an ultra coarse grained WC grain.

Molybdenum and tungsten are strictly controlled impurities in tungsten and molybdenum metallurgical products. The national standard GB10116-88 of our country stipulates that molybdenum is not more than 20ppm in the 0 grade ammonium paratungstate, the national standard GB/T3480-2007 stipulates that MSA-0 molybdenum acid is not more than 150ppm in the product. When dealing with molybdenum scheelite, waste catalyst and other raw materials, they are faced with the task and difficult problem of separating tungsten from molybdenum in solution.

TFT film has the advantages of high responsivity, high brightness and high contrast. It is one of the basic materials in many industries. Therefore, it is widely used in the fields of solar cells, liquid crystal displays and plasma displays. In recent years, along with the rapid development of high-end displays, tungsten molybdenum alloy rotating target is an important material for preparing TFT film.