Ferrosilicon is one of the most widely used ferroalloys, consisting mainly of iron and silicon. It typically contains 15% to 90% silicon, depending on the grade and intended application. This alloy is primarily used as a deoxidizing agent and alloying element in steelmaking and casting operations.
During steel production, oxygen impurities can negatively affect the quality and strength of the final product. Ferrosilicon helps eliminate these impurities by acting as a strong deoxidizer, resulting in cleaner steel with improved mechanical properties.
Key Features of Ferrosilicon
- Excellent deoxidizing capability
- Improves strength and hardness of steel
- Enhances resistance to oxidation
- Improves casting quality
- High thermal stability
- Increases electrical resistivity in certain applications
Typical Applications
Ferrosilicon is widely used in:
- Steelmaking industries
- Iron foundries
- Production of alloy steels
- Manufacturing of cast iron
- Production of silicon-based alloys
- Magnesium production
It is also used in the production of electrical steels, where precise control of magnetic properties is required.
| Ferrosilicon (FeSi) | |||
| Chemical Specification | FeSi 0-3 | FeSi 3-10 | FeSi 10-60 |
| Silicon (Si) | 67-70 % | 70-72% | 72-74% |
| Aluminum (Al) | 2-2.5 % | 1.7-2.3% | 1.4 – 2% |
| Sulphur (S) | 0.01 – 0.03% | 0.01 – 0.03% | 0.01 – 0.03% |
| Carbon (C) | 0.15-0.2% | 0.15-0.2% | 0.15-0.2% |
| Phosphorus (P) | 0.04 – 0.05% | 0.04 – 0.05% | 0.04 – 0.05% |
| Size | 0 – 3 mm (min 90%) | 3 – 10 mm (min 90%) | 10-60 mm (min 90%) |