Tungsten belongs to non-ferrous metals and is also an important strategic metal. Tungsten ore has been called "heavy stone" in ancient times. The content of tungsten in the earth's crust is 0.001%. There are 20 kinds of tungsten-containing minerals that have been found.
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 for tungsten wire, and about 5% is used for other purposes. Tungsten can be used to manufacture firearms, rocket thruster nozzles, metal cutting blades, drill bits, superhard molds, wire drawing dies, etc. Tungsten is widely used in mining, metallurgy, machinery, construction, transportation, electronics, chemicals, light industry. , textile, military, aerospace, science and technology, various industrial fields.
