Introduction: Solving Steelmaking and Alloying Challenges with FeSi 75
Steelmakers and alloy producers often face issues such as inconsistent silicon content, poor deoxidation, and defects in castings or alloys. High-Quality Ferrosilicon 75 (75% Si FeSi) from ZhenAn provides a reliable solution. With controlled silicon content and industrial-grade particle sizes, it ensures precise alloying, efficient deoxidation, and enhanced metallurgical performance across steelmaking, foundry, and specialty alloy applications.

Ferrosilicon 75 is a high-purity ferroalloy consisting of 75% silicon (Si) and 25% iron (Fe), designed for industrial applications where high silicon content is critical. Available in 10–50mm and 10–100mm granules, this FeSi grade is suitable for:

• Electric arc furnace (EAF) and converter steelmaking
• Foundry casting and cast iron production
• Alloying for high-strength and corrosion-resistant steels

Key Specifications:

Excess oxygen in molten steel can cause blowholes, inclusions, and poor mechanical properties. FeSi 75 acts as a strong deoxidizer, forming stable silicon oxides to produce cleaner, higher-quality steel with consistent properties.

For cast iron and other metal castings, Ferrosilicon 75 improves fluidity, refines graphite morphology, reduces shrinkage and porosity, and ensures smooth surface finish and machinability.

High silicon content is essential in low-alloy and high-strength steels. Adding FeSi 75 optimizes hardness, tensile strength, and corrosion resistance while maintaining ductility and process control.

Ferrosilicon 75 is also used in chemical processes and high-silicon alloy production, providing a consistent source of silicon for metallurgical reactions and specialty alloys.

1. High Purity & Consistent Silicon Content – Guaranteed 75% Si for predictable deoxidation and alloying.
2. Dual Particle Size Options (10–50mm / 10–100mm) – Optimized for fast melting and uniform distribution in molten steel.
3. Low Impurity Levels – Minimal sulfur and phosphorus prevent adverse effects on steel and cast iron properties.
4. Industrial-Grade Reliability – Produced in electric arc furnaces from premium raw materials under strict quality control.
5. 30+ Years of Experience – ZhenAn has supplied ferroalloys to global steelmakers, foundries, and alloy manufacturers for decades.

ZhenAn manufactures High-Quality Ferrosilicon 75 using high-purity quartz and iron in electric arc furnaces, ensuring:

• Uniform silicon content and batch-to-batch consistency
• Controlled particle sizes for fine and coarse applications
• Minimal contamination from sulfur, phosphorus, and other trace elements

This precision ensures reliable performance in steelmaking, foundry, and alloying processes.

• Improved Metal Quality – Reduces inclusions, porosity, and defects in steel and cast iron.
• Cost-Efficient Alloying – High silicon yield reduces the total FeSi required per ton of metal.
• Fast Dissolution & Optimized Reaction – Dual granule sizes accelerate melting and alloying in molten metal.
• Versatile Applications – Suitable for EAF, ladle metallurgy, foundry casting, and high-strength alloy production.

Q1: What does “75% Si" mean in Ferrosilicon 75?
A1: It indicates that the alloy contains 75% silicon, optimized for deoxidation, alloying, and metallurgical processes requiring high silicon content.

Q2: Can FeSi 75 be used in both steelmaking and foundry applications?
A2: Yes. Its purity and particle size (10–50mm / 10–100mm) make it versatile for electric arc furnace steelmaking, ladle addition, and cast iron applications.

Q3: How does FeSi 75 improve steel and casting quality?
A3: Silicon strengthens the metal matrix, improves tensile strength and hardness, reduces non-metallic inclusions, and refines graphite structures in cast iron.

Q4: What storage and handling measures are recommended?
A4: Store in dry, covered areas to prevent oxidation. Follow standard safety protocols to minimize dust exposure.

Q5: How do I select the appropriate FeSi grade for my process?
A5: Select based on target silicon content and particle size. FeSi 75 is ideal for high-silicon requirements; lower silicon grades like FeSi 55/65 or 65/75 may suit medium-silicon applications.

Q6: Is dual particle size (10–50mm / 10–100mm) beneficial?
A6: Yes. Fine granules dissolve quickly for rapid deoxidation, while coarse granules provide controlled silicon addition for slower processes.

ZhenAn’s High-Quality Ferrosilicon 75 delivers consistent 75% silicon, dual particle size versatility, and industrial-grade reliability, ensuring precise deoxidation, superior alloying performance, and enhanced steel and casting quality. Trusted by steel manufacturers, foundries, and alloy producers worldwide, ZhenAn provides over 30 years of experience in ferroalloy supply and metallurgical expertise.