Product Description
Ferrosilicon is an alloy composed of iron and silicon (with a silicon content of 7%-90%). Its core uses are as a deoxidizer and alloy additive in steelmaking, and it is also a key inoculant in the casting industry.
- Strong Deoxidizing Ability: At high temperatures, silicon bonds with oxygen to form SiO₂ (melting point: 1723℃), effectively removing oxygen from molten steel and reducing pores/inclusions.
- Physical Properties: Melting point (1200-1300℃) is higher than pure iron; hard, brittle, unforgeable/unrollable, usually lumpy or granular.
- Alloying Effect: Adds to steel: boosts hardness, wear/corrosion resistance; adds to cast iron: enhances mechanical properties.
Applications
- Steelmaking (over 70% usage): Preferred deoxidizer (3-5 kg/ton of steel); also alloying agent for special steels (e.g., silicon steel, spring steel) to boost magnetic permeability or elasticity.
- Casting: Inoculant for cast iron – refines grains, reduces shrinkage cracks, and improves strength/toughness.
- Others: Makes silicon-based alloys (e.g., silicomanganese); acts as a reducing agent (e.g., auxiliary for ferrochrome production).
Specifications
| Grades | Chemical Composition(%) | ||||
| Si | Al≤ | Ca≤ | P≤ | C≤ | |
| FeSi45 | 40.0 – 47.0 | 2.0 | 0.7 | 0.04 | 0.20 |
| FeSi65 | 65.0 – 72.0 | 1.5 | 0.6 | 0.04 | 0.20 |
| FeSi72 | ≥72.0 | 1.0 | 1.0 | 0.04 | 0.20 |
| FeSi75-A | 74.0 – 80.0 | 0.5 | 1.0 | 0.035 | 0.20 |
| FeSi75Al1.5-A | ≥75.0 | 1.5 | 1.0 | 0.035 | 0.10 |
| FeSi75-B | 72.0 – 80.0 | 1.0 | 1.0 | 0.04 | 0.20 |
| FeSi90Al1.5 | 87.0 – 95.0 | 1.5 | 1.5 | 0.04 | 0.20 |
| TFeSi75-A | 74.0 – 80.0 | 0.03 | 0.03 | 0.02 | 0.015 |