Industrial Silicon Iron FeSi 65/55
Deoxidizer for Steelmaking, Casting & Alloying | Fine & Coarse Grain 10–220mm
Industrial Challenge: Controlling Silicon Addition and Alloy Efficiency
Steelmakers and foundries often face difficulties with silicon addition, including:
- Uneven silicon distribution due to fines or improper particle sizing
- Oxidation losses during furnace charging leading to low recovery
- Graphitization and melt consistency issues in cast iron
- Increased costs from repeated alloy corrections
Industrial Silicon Iron FeSi 65/55 from ZhenAn addresses these challenges by providing precise silicon content, uniform granule sizes, and industrial-grade reliability, ensuring predictable results in steelmaking, alloying, and casting operations.
FeSi 65 vs FeSi 55: Choosing the Optimal Silicon Iron Grade
FeSi 55 – Cost-Effective Deoxidizer
- Silicon (Si): ~55%
- Moderate deoxidation capacity
- Suitable for carbon steel, low-alloy steel, and conventional foundry iron
- Optimized for cost-sensitive operations
FeSi 65 – Higher Purity for Improved Alloying
- Silicon (Si): ~65%
- Faster melting and higher recovery than FeSi 55
- Supports ductile and gray iron casting
- Preferred in secondary metallurgy and alloy steel production
Selecting the appropriate grade ensures stable steel chemistry, consistent melt behavior, and controlled alloy costs.
Chemical Composition of Industrial FeSi 65/55
| Element |
FeSi 55 (%) |
FeSi 65 (%) |
| Silicon (Si) |
53.0–58.0 |
63.0–68.0 |
| Iron (Fe) |
Balance |
Balance |
| Aluminum (Al) |
≤ 2.0 |
≤ 2.0 |
| Carbon (C) |
≤ 0.30 |
≤ 0.25 |
| Phosphorus (P) |
≤ 0.04 |
≤ 0.04 |
| Sulfur (S) |
≤ 0.02 |
≤ 0.02 |
Composition can be tailored to meet specific furnace types and steel grades.
Particle Size Options: Fine & Coarse Grain FeSi 65/55 (10–220mm)
- 10–50mm – fine granules for rapid melting and ladle metallurgy
- 10–100mm – standard size for EAF, BOF, and foundry charging
- 10–220mm – coarse granules for bulk furnace addition with slower silicon release
Consistent particle sizing improves silicon recovery, melt uniformity, and furnace efficiency.
Applications of Industrial FeSi 65/55
Steelmaking: Deoxidation & Alloying
- Primary and secondary deoxidation in carbon and alloy steels
- Silicon adjustment for low-oxygen steel grades
- Supports inclusion control and clean steel production
Foundry & Cast Iron Production
- Enhances graphitization in gray and ductile iron
- Stabilizes melt fluidity and casting surface quality
- Provides predictable silicon input for repeatable foundry results
Metallurgical & Chemical Applications
- Base silicon source for specialty alloys
- Reducing agent in metallurgical reactions
- Raw material for silicon-based chemical processes
Production Process: ZhenAn Industrial FeSi 65/55
ZhenAn produces FeSi 65/55 using submerged electric arc furnace technology, combining:
- High-purity quartz
- Low-impurity carbon reductants
- Controlled smelting, tapping, and cooling parameters
Post-production processes include crushing, grading, magnetic separation, and batch-level chemical verification, ensuring industrial-grade consistency.
Quality Control for FeSi 65/55
Each batch of Industrial Ferrosilicon FeSi 65/55 is monitored for:
- Stable silicon content
- Low phosphorus and sulfur
- Controlled aluminum and carbon content
- Uniform particle size distribution
This guarantees furnace efficiency, alloy yield optimization, and metallurgical reliability.
Packaging & Supply Options
- 1 MT jumbo bags
- 25 kg bags palletized
- Bulk shipment for long-term contracts
Packaging prevents moisture absorption and oxidation, maintaining FeSi 65/55 quality during storage and transport.
Why Choose ZhenAn FeSi 65/55
- 30+ years of ferroalloy manufacturing expertise
- Focus on steelmaking, foundry, and alloy-grade FeSi
- Flexible specifications and particle sizing
- Reliable long-term industrial supply
ZhenAn partners with customers who prioritize process stability, predictable silicon recovery, and metallurgical consistency.
FAQ: Industrial Silicon Iron FeSi 65/55
What is the difference between FeSi 55 and FeSi 65?
FeSi 55 has moderate silicon content for cost-effective deoxidation, while FeSi 65 offers higher silicon and faster melting, suitable for alloy steel and cast iron applications.
Which particle size is recommended for ladle or secondary metallurgy?
10–50mm granules are ideal for rapid and uniform dissolution in ladle treatment.
Can FeSi 65/55 be used in ductile iron casting?
Yes. Both grades improve graphitization, melt stability, and casting quality.
How does ZhenAn ensure consistent FeSi quality?
Through submerged electric arc furnace smelting, batch chemical verification, and controlled particle sizing.
Can specifications be customized?
Yes. ZhenAn can adjust silicon content, impurity limits, and granule sizes to meet specific furnace types and metallurgical requirements.
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