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Silicon Metal
Silicon Metal
Silicon
Silicon is the second most common chemical element with a share of 25% in the earth crust after oxygen. It is mostly found as silicates or oxides in different minerals like quartz, feldspar or mica. Elementary silicon is very rare in nature.The most important raw material for silicon metal production is very pure quartz, either in form of gravel or quartzite. According to his chemical formula pure quartz has about 47% of silicon, of which about 80% can be recovered in an industrial process.
Large scale production of silicon is done by reduction of quartz with carbon. The necessary high temperatures of about 2000 °C are processed by an electric arc in a reduction furnace.
Silicon Production
A mixture of quartz and different carbon materials (coal, coke or charcoal) is continuously fed into the furnace. From the furnace tap hole liquid silicon is extracted with a temperature of about 1600°C. The metal is further processed by oxidative refining, casting, crystallization and crushing.
The purity of metallurgical silicon is about 99%. Typical impurities that come from the raw materials are iron, aluminum, calcium and titanium.
Product: | Silicon Metal |
Colour: | Silver gray or dark gray with metallic luster |
Property: | High melting point, good heat resistance, high resistivity and superior oxidation resistance, it's called "industrial glutamate". |
Size: | 10-100mm, 90% Min or can customize as per requirements. |
Packing: | 1MT per woven bag or can customize as per requirements. |
Application: | Silicon metal is used as a feedstock in the production of silicones, aluminum alloys, and semiconductor materials. Based on its application, silicon metals are offered in various grades, the production of various grades of silicon metal starts with the refining process of silica within quartz rock or sand, followed by a carbothermic reduction of silica that occurs in an arc furnace to produce metallurgicalgrade silicon. This is then further refined through a hydro-metallurgical process to produce chemical-grade silicon. Chemical-grade silicon metal is majorly used in the production of silicones and silanes. Metallurgical silicon is 99% pure and is used in steel smelting and aluminum alloys. |
| BASIC TYPE | CHMICAL PERCENTAGE % | NORMAL SIZE | ||||
| ≥ | IMPURITY ( ≤ ) | |||||
| SI（%） | FE（%） | AL（%） | CA（%） | P（ppm） | ||
| 2202 | 99.0 | 0.20 | 0.20 | 0.02 | 25-30 | 10-100MM,90%MIN |
| 3303 | 99.0 | 0.30 | 0.30 | 0.03 | 25-50 | 10-100MM,90%MIN |
| 331 | 99.0 | 0.40 | 0.30 | 0.10 | 50-100 | 10-100MM,90%MIN |
| 4402 | 99.0 | 0.40 | 0.40 | 0.02 | 50-100 | 10-100MM,90%MIN |
| 441 | 99.0 | 0.40 | 0.40 | 0.10 | 50-100 | 10-100MM,90%MIN |
| 553 | 98.5 | 0.50 | 0.50 | 0.3 | - | 10-100MM,90%MIN |
| OTHER ELEMENTS AND SIZE ARE AS PER REQUIREMENTS | ||||||
Chemical Grade Silicon Metal
| BASIC TYPE | CHMICAL PERCENTAGE % | NORMAL SIZE | ||||
| ≥ | IMPURITY ( ≤ ) | |||||
| SI（%） | FE（%） | AL（%） | CA（%） | P（ppm） | ||
| 421 | 99.0 | 0.40 | 0.20 | 0.10 | 50 | 10-100MM,90%MIN |
| 411 | 99.0 | 0.40 | 0.10 | 0.10 | 50 | 10-100MM,90%MIN |
| 4105 | 99.0 | 0.40 | 0.10 | 0.05 | 50 | 10-100MM,90%MIN |
| OTHER ELEMENTS AND SIZE ARE AS PER REQUIREMENTS | ||||||
Silicon Powder
Product: | Silicon Metal Powder |
Colour: | Silver gray or dark gray |
Property: | Heat resistance, wear resistance, oxidation |
Size distribution: | As per customer’s specification |
Packing: | 10KG/ package,25KG/ package,50KG/ package in 1mt plastic woven bag |
Application: | Silicon metal powder is widely used in refractory, metallurgy industry, is a good antioxidant.The addition of metallic silicon powder to refractory materials can first react with oxygen to form a new ore phase to close pores, improve density, prevent the penetration of slag iron, in order to improve the product's resistance to high temperature, wear and oxidation.Therefore, metal silicon powder is widely used in steel furnaces, kilns, kilns and other refractory materials.In metallurgical casting industry, metal silicon powder is used as non-ferrous alloy additive and silicon steel alloy agent to improve the hardenability of steel.It can also be used as a reducing agent for some metals, for new ceramic alloys, etc. |
Sillicon Metal Powder | ||||||
Chemical industry | Composition% | Specification | ||||
Si | Fe | AI | Ca | Size in mesh | Size in um | |
≥ | ≤ | |||||
99.6 | 0.2 | 0.15 | 0.05 | 30-120mesh | 590um-124um | |
99.2 | 0.4 | 0.2 | 0.1 | 40-140mesh | 590um-124um | |
99 | 0.4 | 0.4 | 0.2 | 40-160mesh | 420um-92um | |
98.5 | 0.5 | 0.5 | 0.3 | 40-120mesh | 420um-124um | |
98 | 0.6 | 0.5 | 0.3 | 40-425mesh | 420um-36um | |
| Metallurgical | 99.6 | 0.2 | 0.15 | 0.05 | -150mesh | 100um |
99.2 | 0.4 | 0.2 | 0.1 | -200mesh | 74um | |
99 | 0.4 | 0.4 | 0.2 | -325mesh | 44um | |
98.5 | 0.5 | 0.5 | 0.3 | -400mesh | 38um | |
98 | 0.6 | 0.5 | 0.3 | -600mesh | 25um | |
| Low grade sillicon | 95-97 | impurity content≤4.0% | 40-140mesh | 420um-104um | ||
90-95 | -200 | 74um | ||||
