Tungsten is a metal with high density, high melting point, and good electrical conductivity, which is widely used in various fields such as lighting, electronics, transportation, aerospace, etc. In the field of lighting, tungsten is mainly used for halogen lamps and light bulbs. In the field of electronics, tungsten is mainly used as a wire and electrode material for circuit boards and integrated circuits. In the field of transportation and aerospace, tungsten is mainly used as a weight material for aircraft and missiles. In addition, tungsten is also widely used in the fields of nuclear energy, military industry, etc.