Specifications | Content（%） | Particle size (mm) |
553 | Fe≤0.5%,Al≤0.5%,Ca≤0.3% | 10-70 |
441 | Fe≤0.4%,Al≤0.4%,Ca≤0.1% | 10-70 |
421 | Fe≤0.4%,Al≤0.2%,Ca≤0.1% | 10-70 |
3303 | Fe≤0.3%,Al≤0.3%,Ca≤0.03% | 10-70 |
2202 | Fe≤0.2%,Al≤0.2%,Ca≤0.02% | 10-70 |
97Si | 1.2%≤Fe≤2.0%，0.2≤Ca≤1.5% | 10-70 |
Silicon metal, also known as crystalline silicon or industrial silicon, is mainly used as an additive for non-ferrous alloys. Silicon metal is a product smelted by quartz and coke in an electric heating furnace. The content of the main component silicon is about 98% (in recent years, the silicon content of 99.99% is also included in silicon metal), and the remaining impurities are iron and aluminum. , calcium, etc.
The classification of silicon metal is usually classified according to the content of three main impurities of iron, aluminum and calcium contained in the composition. According to the content of iron, aluminum and calcium in metal silicon, metal silicon can be divided into 553, 441, 411, 421, 3303, 3305, 2202, 2502, 1501, 1101 and other different grades
Silicon metal is a trade name that emerged in the mid-1960s. Its emergence is related to the rise of the semiconductor industry. The international common practice is to divide commodity silicon into silicon metal and semiconductor silicon. Silicon metal is a product smelted by quartz and coke in an electric heating furnace. The content of the main component silicon is about 98% (the silicon content of 99.99% is also included in silicon metal), and the remaining impurities are iron, aluminum, calcium, etc. . Semiconductor silicon High-purity metal silicon used to make semiconductor devices. It is sold in the form of polycrystalline and single crystal, the former is cheap and the latter is expensive. It is divided into various specifications due to different uses. According to statistics, in 1985, the world consumed about 500,000 tons of silicon metal, of which about 60% was used for aluminum alloys, less than 30% was used for organic silicon, about 3% was used for semiconductors, and the rest was used for Steel smelting and precision ceramics, etc.
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