Ferrosilicon 65/75 | Industrial Grade FeSi for Steelmaking, Deoxidation, Foundry & Alloy Steel Applications
Available in 10–100mm and 10–220mm particle sizes to meet diverse industrial requirements.
Industrial Challenge: Ensuring Precise Silicon Addition in Steel and Alloy Production
In modern steelmaking and foundry processes, controlled silicon input is essential for:
- Effective steel deoxidation, preventing oxygen-related defects
- Maintaining consistent alloy chemistry across carbon, alloy, and specialty steels
- Stabilizing graphitization and melt quality in ductile and gray iron
- Minimizing costs caused by re-alloying, overuse of silicon, or variable silicon recovery
ZhenAn Ferrosilicon 65/75 delivers high-purity industrial-grade FeSi with reliable particle size distribution, ensuring efficient steel refining, precise alloying, and consistent foundry outcomes.
FeSi 65 vs FeSi 75: Selecting the Right Silicon Iron Grade
FeSi 65 - Balanced Silicon for Standard Steel and Foundry Applications
- Silicon (Si): approximately 65%
- Moderate deoxidation strength for carbon and low-alloy steel
- Supports gray iron and ductile iron casting
- Optimized for cost-effective, predictable furnace performance
FeSi 75 - High-Purity Silicon for Specialty and Alloy Steels
- Silicon (Si): approximately 75%
- Strong deoxidizer for medium-to-high alloy steels
- Fast melting with higher silicon recovery
- Ideal for stainless steel, low-oxygen steels, and specialty alloy production
Selecting the correct FeSi grade ensures stable steel chemistry, optimized alloying, and predictable metallurgical performance.
Chemical Composition of Ferrosilicon 65/75
| Element |
FeSi 65 (%) |
FeSi 75 (%) |
| Silicon (Si) |
63.0-68.0 |
74.0-80.0 |
| Iron (Fe) |
Balance |
Balance |
| Aluminum (Al) |
≤ 2.0 |
≤ 2.0 |
| Carbon (C) |
≤ 0.25 |
≤ 0.20 |
| Phosphorus (P) |
≤ 0.04 |
≤ 0.04 |
| Sulfur (S) |
≤ 0.02 |
≤ 0.02 |
Specifications can be tailored for steel grade, furnace type, or foundry requirements.
Particle Size Options: FeSi 65/75 Granules
- 10-100mm - standard granules suitable for EAF, BOF, and ladle treatment
- 10-220mm - coarse granules for bulk furnace addition and slower silicon release
Controlled particle sizing reduces fines, improves silicon recovery, and ensures uniform melting, supporting industrial consistency and process reliability.
Applications of FeSi 65/75
Steelmaking: Deoxidation & Alloy Adjustment
- Primary and secondary deoxidation in carbon, alloy, and specialty steels
- Silicon trimming for precise chemical control
- Reduces inclusions and supports clean steel production
Foundry & Cast Iron Production
- Promotes graphitization in gray and ductile iron
- Stabilizes melt fluidity and improves casting surface quality
- Ensures consistent silicon input for repeatable foundry results
Alloy Steel & Metallurgical Uses
- Base silicon source for specialty alloys
- Reducing agent in metallurgical reactions
- Raw material for silicon-based chemical and metallurgical applications
Production Process: ZhenAn Industrial FeSi 65/75
ZhenAn produces Ferrosilicon 65/75 using submerged electric arc furnace smelting, combining:
- High-purity quartz as silicon source
- Low-impurity carbon reductants
- Controlled smelting, tapping, and cooling cycles
Post-production processes include crushing, grading, magnetic separation, and batch chemical verification, ensuring industrial-grade consistency and reliable silicon recovery.
Quality Control for FeSi 65/75
Every batch undergoes strict quality assurance:
- Stable silicon content
- Low phosphorus and sulfur levels
- Controlled aluminum and carbon content
- Uniform particle size distribution
This guarantees efficient furnace operation, optimized alloy usage, and consistent metallurgical performance.
Packaging & Supply Options
- 1 MT jumbo bags
- 25 kg palletized bags
- Bulk shipment for long-term industrial supply
Packaging ensures protection against moisture and oxidation, maintaining FeSi 65/75 quality during storage and transport.
Why Choose ZhenAn FeSi 65/75
- 30+ years of ferroalloy manufacturing expertise
- Specialized in steelmaking-grade, foundry-grade, and alloying FeSi
- Flexible specifications and particle sizing
- Reliable long-term industrial supply
ZhenAn partners with industrial buyers who require stable metallurgical performance, high silicon recovery, and consistent industrial-grade quality.
FAQ: Ferrosilicon FeSi 65/75
What is the difference between FeSi 65 and FeSi 75?
FeSi 65 provides moderate silicon content for standard alloy steel and cast iron, while FeSi 75 offers higher silicon content, faster melting, and stronger deoxidation for high-grade and specialty steels.
Which particle size is best for ladle or secondary metallurgy?
10-100mm granules are ideal for standard furnace charging, while 10-50mm fine granules are preferred for rapid and uniform dissolution.
Can FeSi 65/75 be used in ductile iron casting?
Yes. Both grades enhance graphitization, melt stability, and casting quality.
How does ZhenAn ensure consistent FeSi quality?
Through submerged electric arc furnace smelting, batch chemical verification, and precise particle sizing.
Can specifications be customized?
Yes. ZhenAn can adjust silicon content, impurity limits, and granule sizes according to steel grade, furnace type, or metallurgical process.
