Silicon metal 1101 2202 3303 is a product smelted from quartz and coke in an electric furnace. The main component silicon content is about 98%. Its main use is as an additive to non-ferrous alloys and as a starting material for the production of semiconductor silicon and organic silicon.
| Grade | Composition | |||
| Impurities(%) | ||||
| Si | Fe | AI | Ca | |
| ≥ | ≤ | |||
| 1101 | 99.79 | 0.1 | 0.1 | 0.01 |
| 2202 | 99.58 | 0.2 | 0.2 | 0.02 |
| 3303 | 99.37 | 0.3 | 0.3 | 0.03 |
| 441 | 99.1 | 0.4 | 0.4 | 0.1 |
| 553 | 98.7 | 0.5 | 0.5 | 0.3 |
The production of metal silicon 1101 2202 3303 adopts the carbothermal method, that is, the method of smelting in submerged arc furnaces with silica and carbonaceous reducing agents. The silicon obtained in this way has a purity of 97% to 98%, and such silicon can generally be used in metallurgical applications. If higher-grade silicon is to be obtained, it needs to be refined to remove impurities to obtain metallic silicon with a purity of 99.7% to 99.8%.
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