Tungsten is a metal element with the symbol W and the atomic number 74, belonging to the VIB group of the sixth period in the periodic table. Tungsten is mainly present as a hexavalent cation in nature, with an ionic radius of 0.68×10-10m. Since the W6+ ion has a small radius, high charge, strong polarization ability, and is easy to form complex anions, tungsten is mainly in the form of complex anions [WO4]2-, which combines with cations such as Fe2+, Mn2+, and Ca2+ in the solution to form wolframite or scheelite precipitation.

PRODUCT USE

Basic Use: About 50% of the tungsten ore mined in the world is used for the smelting of high-quality steel, about 35% is used to produce hard steel, about 10% is used to make tungsten wire, and about 5% is used for other purposes. Tungsten can be used to make guns, rocket propulsion nozzles, armor-piercing bullets, metal-cutting blades, drills, superhard molds, wire drawing dies, etc. Tungsten is widely used in mining, metallurgy, machinery, construction, transportation, electronics, chemicals, light industry, textiles, military industry, aerospace, science and technology, and various industrial fields.

Tungsten is widely used in modern technology in pure metal state and alloy state. The most important alloy state is alloy steel, tungsten carbide-based cemented carbide, wear-resistant alloy and strong heat alloy. Tungsten is mainly used in the following industrial fields:

Steel industry: Most of tungsten is used to produce special steel. Tungsten-containing steel is used to make various tools: such as drills, milling cutters, wire drawing dies, female and male dies, gas-supported tools and other parts.