Tungsten in Industry

Tungsten in industry

Tungsten is a non-ferrous metal and an important strategic metal. Tungsten ore was called "heavy stone" in ancient times. In 1781, Swedish chemist Carl William Scheyer discovered scheelite and extracted a new element acid - tungsten. Acid was discovered in 1783 by the Spaniard De Puerya, who also extracted tungsten acid from wolframite.

In the same year, tungsten powder was obtained for the first time by reducing tungsten trioxide with carbon, and the element was named. The content of tungsten in the earth's crust is 0.001%. There are 20 kinds of tungsten-containing minerals that have been discovered. Tungsten deposits are generally formed along with the activity of granitic magma. After smelting, tungsten is a silver-white shiny metal with a very high melting point and great hardness.

Atomic number 74. Steel gray or silvery white, with high hardness, high melting point, and is not corroded by air at room temperature; its main use is to manufacture filaments and high-speed cutting alloy steel, super-hard molds, and is also used in optical instruments and chemical instruments. Element symbol W. Tungsten rod The drawn filaments can be used as filaments in light bulbs, electron tubes, etc.