Tungsten Ore Information-II

Tungsten contained in the tungsten ore used in many areas.

Tungsten is mainly used in the production of hard materials based on tungsten carbide, one of the hardest carbides, with a melting point of 2870 ℃. Tungsten carbide is an efficient electrical conductor, but W₂C is less so. Tungsten carbide is used to make wear-resistant abrasives and cutters and knives for drills, circular saws, milling and turning tools used by the metalworking, woodworking, mining, petroleum and construction industries and accounts for about 60% of current tungsten consumption, and there does not appear to be any slackening in the demand. A secondary use to which tungsten is put is as a steel hardening agent. The hardness and density of tungsten are applied in obtaining heavy metal alloys. A good example is high speed steel, which can contain as much as 18% tungsten. Tungsten steels hold their temper at high temperatures and are therefore valuable for the making of high speed tools, etc. Tungsten is planned for steel alloys is usually produced in the form of ferro-tungsten alloys produced in the electric furnace. The alloys are also used for tool steels. Other uses are for the manufacture of electric light bulb filaments. Tungsten salts are used as mordants and for fire-proofing purposes. Two oxides of tungsten are known WO₂ and WO₃. WO₃ is known by the name of tungstic acid, and from it are formed various salts called tungstates, several of which occur as minerals. Tungstic acid, WO₃, occurs as the mineral tungstic ochre, found as an alteration product of the mineral tungstates.



 

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