Industrial Ferrosilicon 75 | High-Silicon FeSi 75 Alloy
Ferrosilicon 75 serves as a high-efficiency silicon source for demanding metallurgical processes, addressing challenges like silicon recovery volatility, oxidation losses, and inconsistent particle sizing that impact steel cleanliness, alloy yield, and furnace stability.
Key Advantages of Ferrosilicon 75
Industrial Ferrosilicon 75 (FeSi 75) is preferred by steel mills and alloy producers requiring high silicon content (approximately 75%), fast dissolution, and predictable metallurgical behavior. ZhenAn supplies industrial-grade Ferrosilicon 75 in fine and coarse grain sizes from 10–220mm.
Why Choose FeSi 75 Over Lower-Silicon Grades
Compared with FeSi 55 or FeSi 65, Ferrosilicon 75 offers:
- Higher effective silicon yield per ton added
- Faster melting and reaction in EAF, BOF, and ladle metallurgy
- Reduced total alloy addition volume
- More accurate silicon targeting in alloy steel grades
For producers of spring steel, bearing steel, stainless precursors, and special alloy steels, FeSi 75 minimizes correction additions and improves process repeatability.
Chemical Composition
FeSi 75 Standard Specification for Steelmaking and Alloy Production
| Element |
Content (%) |
| Silicon (Si) |
74.0 – 80.0 |
| Iron (Fe) |
Balance |
| Aluminum (Al) |
≤ 2.0 |
| Carbon (C) |
≤ 0.20 |
| Phosphorus (P) |
≤ 0.04 |
| Sulfur (S) |
≤ 0.02 |
Chemical ranges can be customized to meet specific steel grades or chemical-industry requirements.
Particle Size Options
FeSi 75 Fine and Coarse Grain Sizes Available
- 10–50mm – rapid dissolution for ladle and secondary metallurgy
- 10–100mm – standard steelmaking and foundry applications
- 10–220mm – bulk furnace charging and large-scale alloying
Accurate screening reduces fines, limits oxidation loss, and improves silicon recovery efficiency.
Applications Across Industries
Steelmaking Deoxidation and Alloy Adjustment
- Strong deoxidizer in carbon and alloy steel
- Silicon control in low-oxygen steel grades
- Support for clean steel and inclusion reduction
Foundry and Cast Iron Production
- Graphitization enhancement in gray and ductile iron
- Improved casting fluidity and surface quality
- Stable silicon source for repeatable melt chemistry
Chemical and Industrial Applications
- Raw material for magnesium and silicon-based chemicals
- Reducing agent in specialized chemical processes
- Silicon carrier in metallurgical reactions
Production Technology
ZhenAn Ferrosilicon 75 is produced in submerged electric arc furnaces using high-purity quartz as silicon source and low-impurity carbon reductants. After smelting, the alloy undergoes crushing, grading, magnetic separation, and batch chemical analysis, ensuring consistency required by continuous steel production lines.
Quality Control Standards
Each FeSi 75 batch is monitored for stable silicon content, low sulfur and phosphorus, controlled aluminum levels, and uniform particle size distribution. This reduces furnace fluctuations, slag instability, and downstream alloy correction costs.
Packaging and Supply Options
- 1 MT jumbo bags
- 25 kg bags on pallets
- Bulk shipment for long-term contracts
Packaging is designed to protect FeSi 75 from moisture absorption and oxidation during storage and transport.
Why Choose ZhenAn
- 30 years of ferroalloy manufacturing experience
- Focus on steelmaking and alloy-grade consistency
- Customizable chemistry and sizing
- Reliable supply for long-term industrial buyers
ZhenAn supports procurement teams seeking process stability, not spot-market variability.
Frequently Asked Questions
What is Ferrosilicon 75 mainly used for?
FeSi 75 is primarily used for steel deoxidation, silicon adjustment, and alloy production, as well as in foundry and chemical industries.
How does FeSi 75 compare with FeSi 65?
FeSi 75 provides higher silicon concentration, faster melting, and higher silicon recovery, making it suitable for high-precision alloy steel production.
Which FeSi 75 size is best for electric arc furnaces?
10–100mm or 10–220mm sizes are commonly selected for EAF charging, depending on furnace capacity and charging method.
Can Ferrosilicon 75 be used in cast iron?
Yes. It improves graphitization and melt fluidity in both gray iron and ductile iron casting.
Does ZhenAn offer customized Ferrosilicon 75 specifications?
ZhenAn can adjust Si content, impurity limits, and particle size distribution to match specific furnace and product requirements.
