Ferrosilicon FeSi 75/65 | High-Purity Silicon Iron for Steel Deoxidation, Alloying & Foundry | 10–50mm / 10–100mm
In modern steelmaking and alloy production, silicon yield instability remains a critical cost and quality risk. Common issues faced by mills and foundries include:
- Unpredictable deoxidation results during tapping
- Excessive oxidation loss caused by fines or uneven particle size
- High impurity carryover affecting steel cleanliness
- Frequent chemistry corrections increasing alloy consumption
Ferrosilicon FeSi 75 / FeSi 65 is engineered to address these challenges by delivering stable silicon content, controlled particle size, and reliable melting behavior across different furnace types.
- Silicon (Si): approx. 75%
- Strong deoxidizing capability
- Higher silicon recovery per ton
- Ideal for alloy steel, clean steel, and secondary metallurgy
- Silicon (Si): approx. 65%
- More gradual silicon release
- Suitable for carbon steel and foundry iron
- Optimized cost-to-performance ratio
Using the correct FeSi 75 or FeSi 65 grade reduces over-addition and stabilizes downstream chemistry control.
| Element | FeSi 75 (%) | FeSi 65 (%) |
|---|---|---|
| Silicon (Si) | 74.0–80.0 | 63.0–68.0 |
| Iron (Fe) | Balance | Balance |
| Aluminum (Al) | ≤ 2.0 | ≤ 2.0 |
| Carbon (C) | ≤ 0.20 | ≤ 0.25 |
| Phosphorus (P) | ≤ 0.04 | ≤ 0.04 |
| Sulfur (S) | ≤ 0.02 | ≤ 0.02 |
Customized chemistry control is available for specific steel grades or furnace practices.
FeSi 75 / FeSi 65 Standard Sizes: 10–50mm & 10–100mm
- 10–50mm FeSi granules
- Fast dissolution
- Ideal for ladle treatment and secondary refining
- 10–100mm FeSi lumps
- Controlled melting in EAF and induction furnaces
- Reduced oxidation loss during charging
Uniform sizing improves silicon recovery efficiency and minimizes slag instability.
- Primary and secondary deoxidation
- Silicon trimming for structural and alloy steels
- Improved inclusion control and steel cleanliness
- Enhanced graphitization in gray iron
- Improved nodularity support in ductile iron
- Better casting surface finish and consistency
- Base alloy input for silicon-bearing alloys
- Stable silicon source for controlled alloy chemistry
ZhenAn produces FeSi 75 and FeSi 65 using submerged electric arc furnace smelting, combined with:
- Selected high-grade quartz
- Low-impurity carbon reductants
- Controlled tapping and cooling cycles
Post-smelting, all material undergoes crushing, screening, magnetic separation, and batch chemical analysis, ensuring suitability for continuous industrial use.
Each batch of Ferrosilicon FeSi 75 / FeSi 65 is evaluated for:
- Silicon content stability
- Low sulfur and phosphorus
- Consistent particle size distribution
- Reduced fines percentage
This approach helps steelmakers avoid process fluctuations, yield loss, and re-alloying costs.
- 1 MT jumbo bags
- 25 kg bags with palletized loading
- Bulk shipment for long-term supply agreements
Packaging is designed to minimize moisture exposure and oxidation during transport and storage.
- Over 30 years of ferroalloy manufacturing experience
- Focus on steelmaking-grade consistency
- Flexible specifications for FeSi 75 and FeSi 65
- Long-term supply stability for mills and alloy plants
ZhenAn supports buyers who value process reliability over short-term price fluctuations.
FeSi 75 offers higher silicon concentration and stronger deoxidation, while FeSi 65 provides a more economical solution for standard alloying and foundry use.
Both 10–50mm and 10–100mm are suitable. The choice depends on furnace capacity, charging method, and desired melting speed.
In some carbon steel applications, yes. However, high-precision alloy steels typically require FeSi 75 for accurate silicon control.
Yes. Both FeSi 75 and FeSi 65 support graphitization and melt consistency in ductile and gray iron.
ZhenAn can adjust silicon content, impurity limits, and particle size distribution to meet specific production requirements.
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