Silicon Metal is known as a semi-metallic or metalloid, having several of the characteristics of metals. It is the second most abundant element in the Earth's crust after oxygen, naturally occurring in various forms of silicon dioxide or silicates and very rarely in its pure form in volcanic exhalations.
Most metallurgical silicon metal is used as an alloying agent in the aluminium industry due to its ability to increase the strength of aluminium. Demand from the aluminium industry has grown steadily in recent years due to increased usage of aluminium in structural engineering, aircraft manufacture and the automotive industry. Aluminium alloys are lighter and more resistant to corrosion than carbon-steel and can be made by addition of metals such as copper, zinc, magnesium, manganese as well as silicon.
On a commercial scale metallurgical silicon metal is produced by the carbothermic reaction of silica (quartz) in an electric arc furnace using carbon electrodes where the temperature in the main reaction zone exceeds 1800°C. Commercially produced metallurgical grade silicon metal is typically Si 98% pure and is notably produced in China, Russia, Brazil, Norway, South Africa and USA.
Application: Silicon is used an alloying element in production of Aluminium. It imparts strength and reduces weight of the metal. Silicon is also used in manufacture of solar panels. Besides, silicon is used in many day to day products like lubricants, greases etc. Silicon chips (made from semi-conductor grade silicon) are used in many electronic devices. It is also used in ceramics, pyrotechnics, ammunition, refractories, vapor deposition etc.
Size: 0-1mm, 0-2mm, 0-5mm, 0-8mm, 2-10mm, 1-12mm, 10-100mm, 200 mesh
Packing: 50Kgs bag, 250Kg steel drums and 1 Ton bags or as per customer requirement
Variations: Silicon Metal 553, 2202, 3303, 411, 421 & 441
Typical chemical composition of Silicon metal is shown below:
|Si: 97.0 – 99.5%
|Fe: 0.5% Max
|Al: 0.5% Max
|Ca: 0.3% Max