Silicon metal 2202 also known as crystalline silicon or industrial silicon, is mainly used as a non-ferro alloy additive. Silicon metal is produced by smelting quartz and coke in an electric heating furnace. The content of silicon is about 98% (in recent years, 99.99% is also contained in silicon metal). Other impurities are iron, aluminum and calcium.
Most metallurgical silicon metal 2202 is used as an alloy additives 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 2202 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 2202 is typically Si 98% pure and is notably produced in China, Russia, Brazil, Norway, South Africa and USA.
| SPECS | CHEMICAL CONTENT% | ||
| Impurity elements % max | |||
| Fe | Al | Ca | |
| 2202 | 0.2 | 0.2 | 0.02 |
Adding silicon metal 2202 to aluminium alloys makes them stronger and lighter. As a result they are increasingly used in the automotive industry to replace heavier cast iron components. This allows weight reductions, a reduction in fuel consumption, increased efficiencies and subsequent benefits to the environment by reducing the greenhouse gas emissions and conserving fossil fuels. There is increasing demand for silicon metal 2202 used in the manufacture of solar panels, currently a buoyant industry. Silicon based polymers are also used as alternatives to hydrocarbon based products. They can appear in many everyday products such as lubricants, greases, resins, skin and hair products. Another common use of silicon is silicon chips, produced from semi-conductor grade silicon, which are components used in many every day electronic devices.
High quality 2202 silicon manufacturers are rare, few manufacturers will provide customers with thoughtful service and high quality silicon metal 2202 products. This is mainly because there are only a handful of genuine 2202 silicon manufacturers, many customers purchase silicon metal 2202 from distributors. Because distributors are not professional in the production process of silicon metal 2202, it is difficult for customers to obtain technical guidance from distributors after purchasing silicon metal 2202.
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