Ferrosilicon FeSi 65/75 | Fine & Coarse Grain Silicon Iron
Introduction: Ensuring Superior Steel Quality with High-Purity Ferrosilicon
In modern steelmaking, challenges such as non-uniform deoxidation, inconsistent alloying, and defects in castings can compromise product quality, increase costs, and reduce efficiency. Ferrosilicon FeSi 65/75 from ZhenAn addresses these issues by providing high-purity silicon iron in fine and coarse granules, enabling precise silicon addition, effective deoxidation, and improved metallurgical performance across steel, foundry, and alloy production processes.
What is Ferrosilicon FeSi 65/75?
Ferrosilicon FeSi 65/75 is a high-quality ferroalloy consisting primarily of silicon (Si) and iron (Fe), with silicon content ranging from 65% to 75%. Available in 10–220mm particle sizes, the alloy is suitable for both fine and coarse grain applications, making it versatile for:
- Electric arc furnace (EAF) steelmaking
- Ladle metallurgy
- Foundry cast iron and steel production
- High-silicon alloy manufacturing
Key Specifications
| Property |
Typical Value |
| Silicon (Si) |
65–75% |
| Iron (Fe) |
Balance |
| Grain Size |
Fine & Coarse 10–220mm |
| Impurities |
Low Sulfur & Phosphorus |
| Form |
Industrial-grade FeSi |
Applications of Ferrosilicon FeSi 65/75
1. Steel Deoxidation
Excess oxygen in molten steel can result in blowholes, inclusions, and uneven mechanical properties. FeSi 65/75 acts as a potent deoxidizer, forming stable silicon oxides and producing cleaner, higher-quality steel.
2. Alloying for High-Performance Steels
Precise silicon adjustment is critical for producing low-alloy, high-strength, and corrosion-resistant steels. Ferrosilicon 65/75 ensures uniform silicon content, enhancing tensile strength, hardness, and ductility without compromising process efficiency.
3. Foundry and Cast Iron Production
FeSi 65/75 improves cast iron fluidity, reduces shrinkage and porosity, and refines graphite structures, resulting in durable, machinable castings with superior surface finish.
4. High-Silicon Alloy Production
Used in specialty alloys, Silicon Iron 65/75 provides consistent silicon supply for metallurgical reactions and chemical processes that demand high-purity FeSi.
Why Choose ZhenAn's Ferrosilicon FeSi 65/75?
- High Purity & Consistency – Silicon content strictly controlled at 65–75% for predictable performance.
- Fine & Coarse Grain Sizes (10–220mm) – Optimized for rapid dissolution and precise alloying.
- Low Impurities – Minimal sulfur and phosphorus ensure superior steel and cast iron quality.
- Industrial-Grade Reliability – Produced in electric arc furnaces from premium raw materials under stringent quality control.
- Decades of Metallurgical Expertise – ZhenAn has served global steel mills, foundries, and alloy manufacturers for over 30 years.
Production Process: High-Quality EAF Ferrosilicon
ZhenAn produces Ferrosilicon FeSi 65/75 using high-purity quartz and iron in electric arc furnaces with controlled temperature and reaction conditions. This ensures:
- Uniform silicon content across batches
- Controlled particle size distribution for fine and coarse applications
- Minimal contamination by sulfur, phosphorus, and other trace elements
This precise production method guarantees consistent performance in deoxidation, alloying, and foundry processes.
Industrial Advantages of FeSi 65/75
- Enhanced Steel and Cast Iron Quality – Reduces inclusions, porosity, and surface defects.
- Efficient Alloying – High silicon yield reduces the total quantity needed, lowering production costs.
- Optimized Melting and Dissolution – Wide particle size range (10–220mm) accelerates reactions in molten metal.
- Versatility Across Industries – Suitable for steelmaking, cast iron production, and high-silicon alloys.
FAQ: Ferrosilicon FeSi 65/75
Q1: What does "65/75" mean in Ferrosilicon FeSi 65/75?
A1: It indicates the silicon content range (65–75%) of the alloy, suitable for deoxidation and alloying in steel and cast iron production.
Q2: Can FeSi 65/75 be used in both fine and coarse grain applications?
A2: Yes. With particle sizes from 10–220mm, it is versatile for both rapid dissolution in molten steel and controlled addition in foundries.
Q3: How does FeSi 65/75 improve steel and cast iron properties?
A3: Silicon strengthens the metal matrix, enhances hardness and tensile strength, refines graphite in cast iron, and reduces non-metallic inclusions.
Q4: What are the storage and handling requirements?
A4: Store in dry, covered areas to prevent oxidation. Follow standard industrial safety protocols to avoid dust exposure.
Q5: How do I select the right FeSi grade for my steelmaking process?
A5: Select based on desired silicon content and particle size requirements. FeSi 65/75 is ideal for medium to high silicon needs, while FeSi 55/65 or 75/80 may be better for lower or higher silicon specifications.
Conclusion: Trusted Ferrosilicon FeSi 65/75 for Professional Metallurgy
ZhenAn's Ferrosilicon FeSi 65/75 delivers high-purity silicon, controlled particle size for fine and coarse applications, and industrial-grade reliability. Designed for steelmakers, foundries, and alloy producers, it ensures precise deoxidation, superior alloying performance, and consistent metal quality. With over 30 years of global experience, ZhenAn is a trusted partner for ferroalloy supply worldwide.
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