Silicon Iron 65/75 | High Purity FeSi Flakes & Granules
High purity FeSi 65-75% available in flakes and granules (10-50mm / 10-100mm) for alloy steel, foundry, and chemical applications.
Metallurgical Challenge: Inconsistent Silicon Recovery and Alloy Stability
In alloy steelmaking and foundry operations, unstable silicon recovery, inclusion formation, and variable melt behavior are common challenges. Chemical users face similar issues when silicon purity and reaction consistency fluctuate between batches. These problems often originate from impure ferrosilicon, uneven particle size, or uncontrolled silicon content.
Silicon Iron 65/75 (FeSi 65–75%) supplied by ZhenAn is engineered to deliver predictable silicon yield, low impurity levels, and consistent physical form, helping metallurgical and chemical producers stabilize processes and improve final product quality.
What Is Silicon Iron 65/75 FeSi?
Silicon Iron 65/75 is a medium-to-high silicon ferroalloy containing 65–75% silicon, produced via electric arc furnace smelting. It is available as flakes and granules, offering flexibility for different feeding systems and reaction speeds.
Typical Grade Specifications – FeSi 65/75
| Item | Standard Value |
|---|
| Silicon (Si) | 65–75% |
| Iron (Fe) | Balance |
| Form | Flakes / Granules |
| Particle Size | 10–50mm, 10–100mm |
| Sulfur (S) | Low |
| Phosphorus (P) | Low |
Silicon Iron 65/75 for Alloy Steel Production
Controlled Silicon Addition in Structural & Engineering Steels
In alloy steel, silicon contributes to strength, oxidation resistance, and elastic limit. FeSi 65/75 enables precise silicon adjustment without excessive reactivity, making it suitable for:
- Structural steels
- Engineering steels
- Low- and medium-alloy steels
The controlled Si range helps avoid over-deoxidation and slag instability.
FeSi 65/75 Deoxidation Performance in Steelmaking
Clean Steel with Reduced Non-Metallic Inclusions
During steelmaking, dissolved oxygen leads to inclusions and mechanical inconsistency. Silicon Iron 65/75 acts as an effective deoxidizer by forming stable silicon oxides, improving steel cleanliness and downstream processing performance.
Operational Benefits:
- Lower inclusion levels
- Improved surface quality
- Stable ladle chemistry
Silicon Iron 65/75 in Foundry Applications
Improved Fluidity and Graphite Control
For cast iron and steel castings, FeSi 65/75 enhances:
- Molten metal fluidity
- Graphite morphology refinement
- Casting surface finish
- Machinability
Granules and flakes allow foundries to tailor reaction speed to furnace size.
Chemical Industry Use of High Purity FeSi 65/75
Reliable Silicon Source for Chemical Processing
In chemical applications, high purity silicon iron 65/75 is used as:
- A reducing agent
- A metallurgical silicon source
- A feedstock for silicon-based compounds
Low sulfur and phosphorus content ensures compatibility with chemical reaction systems.
FeSi 65/75 Flakes vs Granules | Particle Size 10–50mm & 10–100mm
ZhenAn supplies Silicon Iron 65/75 in multiple physical forms to meet industrial needs:
- Flakes – Fast reaction, precise dosing
- Granules – Controlled melting and stable silicon release
Size Options:
- 10–50mm – Rapid dissolution for precise alloying
- 10–100mm – Balanced melting for large furnaces
Why Choose ZhenAn Silicon Iron 65/75?
Technical Reliability Backed by Experience
- Stable 65–75% Silicon Range – Predictable metallurgical behavior
- Low Impurity Control – Supports clean steel and chemical-grade use
- Electric Arc Furnace Production – Uniform chemistry and structure
- Strict Size Screening – Consistent flakes and granules
- 30+ Years of Ferroalloy Expertise – Trusted by global steelmakers
Manufacturing Process: Electric Arc Furnace FeSi 65/75
ZhenAn produces Silicon Iron 65/75 using selected quartz and iron materials in modern electric arc furnaces. Controlled smelting, crushing, and screening ensure consistent composition and physical properties suitable for metallurgical and chemical industries.
Key Industrial Advantages of FeSi 65/75
- Higher silicon utilization efficiency
- Reduced alloy consumption per ton of metal
- Improved steel and casting consistency
- Reliable chemical reaction performance
- Lower operational risk in alloy adjustment
FAQ – Silicon Iron 65/75
Q1: What does 65/75 mean in Silicon Iron 65/75?
A1: It refers to the silicon content range of 65–75%, balancing reactivity and recovery.
Q2: Is FeSi 65/75 suitable for chemical applications?
A2: Yes. Its high purity and low impurities make it suitable for metallurgical and chemical processes.
Q3: Should I choose flakes or granules?
A3: Flakes react faster and offer precision; granules provide controlled silicon release.
Q4: Which size is better: 10–50mm or 10–100mm?
A4: Smaller sizes suit precise alloying; larger sizes are preferred for large furnaces.
Q5: How does FeSi 65/75 compare to FeSi 75?
A5: FeSi 65/75 offers better control and lower reactivity, suitable for broader applications.
Conclusion: High-Purity Silicon Iron 65/75 for Professional Applications
Silicon Iron 65/75 from ZhenAn delivers controlled silicon content, flexible physical forms, and consistent industrial performance. Designed for alloy steelmakers, foundries, and chemical manufacturers, it supports clean steel production, reliable casting quality, and stable chemical processing—backed by decades of metallurgical expertise.
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