Nickel-tungsten catalysts are widely used in hydrotreating and hydrocracking. The main components are about 25% tungsten trioxide, 2% nickel oxide, 50% alumina, 5% silica, and a small amount of iron, vanadium and other substances. Waste nickel-tungsten catalysts contain metals such as tungsten and nickel. If they are recycled, they will generate huge economic benefits and avoid environmental pollution caused by the waste of nickel-tungsten catalysts.

Tungsten carbide (WC) is the main raw material for the production of cemented alloy. The main production method is one-step method and two-step method. At present, the main method for producing WC powder is two-step method: Firstly reducing the tungsten oxide to tungsten powder with hydrogen. Then, tungsten powder is carbonized to form WC powder at a high temperature. In the production practice, the method is not suitable for producing ultrafine WC powder.

In recent years, the improvement of the metallurgy and the improvement of the concentration capacity of the oxidized tungsten-molybdenum ore have been greatly improved. For example, Gansu, Qinghai, Xinjiang, Inner Mongolia and other provinces now, has the ability to have a froth float on tungsten-molybdenum ore with a tungsten trioxide content of 3 to 8%, and a molybdenum content of 2.5 to 12.5%; The Guangdong and Guangxi regions have the ability to have a froth floatation on tungsten-molybdenum ore containing 20 to 45% of tungsten trioxide and 10 to 25% of molybdenum.

Tungsten Carbide Button has a series of excellent properties, such as high hardness, abrasion resistance, good strength and toughness, heat resistance, corrosion resistance and so on. Meanwhile, the properties of high hardness and abrasion resistance keep the tungsten carbide button in shape basically at 500℃ and maintain the high hardness at 1000℃.