Molybdenum and molybdenum alloy composite plates are widely used as boat or cushion material for the sintering industry of electronic ceramic substrate because of their advantages of high melting point, good heat resistance, low evaporation pressure, good thermal conductivity and small coefficient of thermal expansion.

Tungsten is a very important strategic resource. With the development of the following products, tungsten wire, tungsten powder, tungsten strip and other high-end cemented carbide require continuous improvement of ammonium para tungstate. The existing national standard zero grade ammonium para tungstate can not meet the requirements of high end cemented carbide, which not only deals with the impurities and physical properties of ammonium para tungstate. A certain requirement can be put forward, and the enterprises that produce some high-end products have put forward special strict requirements for individual impurity elements. Therefore, the high purity tungsten powder is more popular in the market.

With the development of electronic industry, the demand for pure tungsten special-shaped parts is increasing. Tungsten shaped parts are of great importance in aerospace, military industry and nuclear industry. Especially in the field of semiconductor technology, Bluetooth, Wi-Fi, 3G and other applications are booming. The ion implantation machine is the main equipment for the production of semiconductor crystal garden. 

Industrial wastes containing heavy metals such as copper, nickel, cobalt, manganese, tungsten, and other heavy metals are treated by proper methods, and the valuable components of the industrial waste can be recycled, the harmless and resource utilization of industrial waste can be realized. At present, the method of metal recycling for such industrial wastes is usually used by alkali leaching, using sodium hydroxide or sodium carbonate as leach agents. The tungsten is leached under normal pressure or pressure condition, and tungsten is separated from other metals, and the tungstate solution is obtained by ion exchange and enrichment in the next step, the alkali leaching residue is then soaked in acid. Removal of impurities, separation and purification of copper, nickel, cobalt and manganese products.

The alkaline decomposition method of high calcium tungsten ore is first grinding with high calcium tungsten minerals (tungsten concentrates, wolwolwoltungsten medium ore, wolframite, high calcium tungsten fine mud, calcium containing 3%), and then the grinding high calcium tungsten minerals and high concentration alkali are added together in the ordinary stirred autoclave, at the temperature of 130-200°C and pressure 0.15-1.0MPa. Under the conditions of heat preservation and pressure cooking, after the pressure cooking is unloaded, the filtration and washing are carried out at a certain temperature and NaOH concentration, and the sodium tungstate solution is purified. The sodium tungstate solution contains WO₃ 80-300g/L and the free NaOH is 90-280g/L.

Nanocrystalline WC-Co cemented carbide has been widely used in cutting tools, impact tools and wear resistant parts, because of its high hardness and high strength. Nano tungsten powder with uniform particle size and good dispersibility is the key technology for the preparation of high performance nanocrystalline WC-Co cemented carbide.

Tungsten carbide is black hexagonal crystal which has metallic luster, the hardness is closer to diamond. Since 1973, Levy R B firstly brought up the idea of catalytic effect of tungsten carbide like Pt, researchers started using it in multiphase catalytic and electro catalytic field to take place of precious metal catalyst.

China is a main tungsten producing country with more than 20 thousand exportation of coarse tungsten products every year. Over 50% of tungsten consumption in the world is supplied by China. Domestic tungsten metal products output is around 1000~1200 tons. However, high quality tungsten material producing technique and intelligent property are extremely lack in China.

In recent years, due to its excellent electrical conductivity, heat dissipation and expansion coefficient, it is used in large scale integrated circuits and high power microwave devices to make substrate, hot pillow chimera, package connector and heat dissipation element. Because of the high thermal conductivity and heat resistance of the tungsten copper alloy, the power of the microelectronic devices is greatly improved, and the device can be miniaturized. The expansion coefficient can match well with the silicon, gallium arsenide and other semiconductor materials in microelectronic devices, so it is an ideal packaging material.

China is a big country in energy production and consumption. Coal is the main source of energy supply. Coal-fired power generation mainly through direct combustion, coal combustion produced a large number of smoke, nitrogen oxides (NOx), sulfur oxide (SOx), mercury and other heavy metal oxides and a large number of carbon dioxide gas.