Ferrosilicon 55/65/75 | Industrial Grade FeSi for Steelmaking, Deoxidation & Alloy Production | Multi-Size 10–220mm
In modern steel production, silicon plays a dual role as both a deoxidizer and an alloying element. Common operational challenges include:
- Silicon recovery fluctuations due to fines or uneven particle sizes
- Over-addition of high-silicon alloys increasing costs without improving steel quality
- Inconsistent graphitization and melt fluidity in cast iron
- Frequent re-alloying to meet target chemistry
Ferrosilicon FeSi 55/65/75 from ZhenAn is engineered to address these challenges by providing precisely controlled silicon content, flexible granule sizes, and industrial-grade consistency, supporting reliable steelmaking, alloying, and foundry processes.
Selecting the Right FeSi Grade: FeSi 55, FeSi 65, and FeSi 75
FeSi 55 – Cost-Efficient Silicon Source
- Silicon (Si): ~55%
- Moderate deoxidation strength
- Suitable for carbon steel, low-alloy steel, and basic foundry applications
- Optimized for cost-effective alloying
FeSi 65 – Balanced Silicon Iron for Standard Alloying
- Silicon (Si): ~65%
- Faster melting and higher recovery than FeSi 55
- Supports gray and ductile iron production
- Suitable for secondary metallurgy and alloy steel
FeSi 75 – High-Purity Silicon for Precision Alloying
- Silicon (Si): ~75%
- Strong deoxidizer for alloy and high-grade steels
- Fast melting, high silicon yield
- Ideal for stainless, special alloys, and low-oxygen steel
Choosing the right grade ensures stable metallurgical performance, controlled costs, and efficient furnace operation.
Chemical Composition of Industrial Ferrosilicon FeSi 55/65/75
| Element | FeSi 55 (%) | FeSi 65 (%) | FeSi 75 (%) |
|---|
| Silicon (Si) | 53.0–58.0 | 63.0–68.0 | 74.0–80.0 |
| Iron (Fe) | Balance | Balance | Balance |
| Aluminum (Al) | ≤ 2.0 | ≤ 2.0 | ≤ 2.0 |
| Carbon (C) | ≤ 0.30 | ≤ 0.25 | ≤ 0.20 |
| Phosphorus (P) | ≤ 0.04 | ≤ 0.04 | ≤ 0.04 |
| Sulfur (S) | ≤ 0.02 | ≤ 0.02 | ≤ 0.02 |
Composition can be tailored for specific furnace or alloying requirements.
Particle Size Options for FeSi 55/65/75: 10–220mm
Multi-Size Granules to Match Industrial Metallurgical Needs
- 10–50mm – fast melting, suitable for ladle metallurgy and secondary refining
- 10–100mm – standard size for EAF, BOF, and foundry charging
- 10–220mm – coarse granules for bulk furnace charging with slower silicon release
Consistent sizing reduces fines, improves silicon recovery, and stabilizes furnace operations.
Applications of Ferrosilicon FeSi 55/65/75
Steel Deoxidation & Alloy Adjustment
- Primary and secondary deoxidation in carbon and alloy steel
- Silicon trimming for precise chemistry control
- Supports clean steel with reduced inclusion formation
Foundry & Cast Iron Production
- Graphitization promoter in gray and ductile iron
- Improved melt fluidity and casting surface quality
- Stable silicon input for repeatable foundry results
Metallurgical & Chemical Uses
- Base silicon for specialty alloys
- Reducing agent in metallurgical reactions
- Raw material for silicon-based chemicals
Production Process: High-Quality FeSi Manufacturing
ZhenAn produces FeSi 55/65/75 using submerged electric arc furnace technology, including:
- High-purity quartz as the silicon source
- Low-impurity carbon reductants
- Controlled smelting, tapping, and cooling cycles
Post-smelting processes include crushing, grading, magnetic separation, and batch chemical analysis, ensuring consistent industrial performance.
Quality Control for Industrial-Grade Ferrosilicon
Each batch of FeSi 55/65/75 is rigorously tested for:
- Stable silicon content
- Low sulfur and phosphorus
- Controlled aluminum and carbon content
- Consistent particle size distribution
This ensures furnace efficiency, optimized alloy use, and reliable metallurgical outcomes.
Packaging & Supply Options
- 1 MT jumbo bags
- 25 kg bags palletized
- Bulk shipment for long-term contracts
Packaging minimizes moisture exposure and oxidation, preserving FeSi quality throughout transport and storage.
Why Choose ZhenAn for FeSi 55/65/75 Supply
- 30+ years of ferroalloy manufacturing expertise
- Focus on steelmaking-grade, foundry-grade, and alloying FeSi
- Flexible specifications and particle sizing
- Long-term industrial supply reliability
ZhenAn partners with buyers seeking stable metallurgical performance and predictable silicon recovery.
FAQ: Ferrosilicon FeSi 55/65/75
What is the difference between FeSi 55, FeSi 65, and FeSi 75?
- FeSi 55 – moderate silicon, cost-effective, suitable for carbon steel and basic foundry iron
- FeSi 65 – balanced silicon for standard alloying and foundry use
- FeSi 75 – high silicon content for alloy steel, stainless, and high-purity applications
Which FeSi size is best for ladle or secondary metallurgy?
10–50mm granules are preferred for rapid dissolution and uniform reaction.
Can FeSi 55/65/75 be used in ductile iron casting?
Yes. All grades support graphitization, melt stability, and casting quality.
How does ZhenAn ensure consistent quality?
Through controlled electric arc furnace smelting, batch-level chemical verification, and precise particle sizing.
Can FeSi specifications be customized?
Yes. ZhenAn can adjust silicon content, impurity limits, and granule sizes based on furnace type and process requirements.
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