Ferrosilicon is an alloy of iron and silicon with a typical silicon content by weight of 15–90%. It contains a high proportion of iron silicide’s. It is produced by reduction of silica or sand with coke in the presence of iron. Typical sources of iron are scrap iron or millscale. It is also made in blast furnaces lined with acid fire bricks.
Usage : Ferrosilicon is used as a source of silicon to reduce metals from their oxides and to deoxidize steel and other ferrous alloys. This prevents the loss of carbon from the molten steel. It is also used for manufacture of silicon, corrosion-resistant and high-temperature-resistant ferrous silicon alloys, and silicon steel for electromotors and transformer cores. In the manufacture of cast iron, ferrosilicon is used for inoculation of the iron to accelerate graphitization.
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| Ferro Silicon ( FeSi) | |||||
| Material Type | Type 1 | ||||
| Si | Ai | C | S | P | |
| Type 1 | 70% – 75% | 2% max | 2% max | 0.05% max | 0.05% max |
| Type 2 | 72% min | 1.5% max | 2% max | 0.05% max | 0.05% max |
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