Main Applications, Steelmaking Use, and Production Process of Ferro Silicon 75

ZhenAn High-Quality FeSi 75 for Global Steel & Foundry Industries

Introduction to Ferro Silicon 75

Ferro Silicon 75 (FeSi 75) is one of the most widely used ferroalloys in the metallurgical industry. Containing approximately 75% silicon, it serves as a critical deoxidizer, alloying additive, and inoculant in steelmaking and cast iron production.

As a professional ferroalloy manufacturer and exporter, ZhenAn supplies high-quality Ferro Silicon 75 with stable chemical composition, low impurity levels, and consistent performance, meeting the demanding requirements of modern steel plants and foundries worldwide.

What Are the Main Applications of Ferro Silicon 75?

The main applications of Ferro Silicon 75 are concentrated in steelmaking, cast iron production, and alloy steel manufacturing, where precise silicon control and effective deoxidation are essential.

1. Steelmaking Industry

In carbon steel, alloy steel, and special steel production, Ferro Silicon 75 is primarily used as a powerful deoxidizer. During steelmaking, dissolved oxygen can cause inclusions, porosity, and reduced mechanical properties. Adding FeSi 75 effectively removes oxygen from molten steel, improving steel cleanliness and structural integrity.

2. Cast Iron and Ductile Iron Production

In the foundry industry, Ferro Silicon 75 is widely applied as an inoculant to promote uniform graphite formation. It enhances casting quality, reduces chill tendency, and improves machinability in gray iron and ductile iron.

3. Alloying Additive for Special Steels

For silicon alloy steels, electrical steels, and heat-resistant steels, Ferro Silicon 75 serves as a precise silicon alloying agent, helping achieve targeted chemical compositions while maintaining low carbon and impurity levels.

Thanks to these versatile uses, Ferro Silicon 75 remains a core raw material across multiple metallurgical sectors.

What Is Ferro Silicon 75 Used for in Steelmaking?

Efficient Deoxidation

One of the most important roles of Ferro Silicon 75 in steelmaking is deoxidation. Silicon has a strong affinity for oxygen, and FeSi 75 reacts rapidly with dissolved oxygen to form stable oxides, which can be removed as slag.

Compared with lower-grade ferro silicon, Ferro Silicon 75 offers:

Faster deoxidation reaction

Lower consumption per ton of steel

Reduced impurity introduction

Silicon Adjustment and Alloy Control

In modern steel production, precise control of chemical composition is critical. Ferro Silicon 75 allows steelmakers to accurately adjust silicon content, ensuring consistent mechanical properties such as strength, elasticity, and corrosion resistance.

Improvement of Steel Quality

By reducing oxygen content and non-metallic inclusions, FeSi 75 improves:

Steel cleanliness

Surface quality

Internal structure

Yield rate during rolling and forging

For electric arc furnace (EAF) and basic oxygen furnace (BOF) processes, ZhenAn Ferro Silicon 75 is compatible with various steelmaking routes.

How Is Ferro Silicon 75 Produced?

Raw Materials Selection

The production of Ferro Silicon 75 begins with carefully selected raw materials, including:

High-purity quartz (SiO₂)

Carbonaceous reducing agents (coke, coal)

Iron-bearing materials

At ZhenAn, strict raw material inspection ensures low phosphorus, sulfur, and carbon content in the final product.

Submerged Electric Arc Furnace Process

Ferro Silicon 75 is produced in submerged electric arc furnaces, operating at extremely high temperatures (above 2000°C). Inside the furnace:

Quartz reacts with carbon to release silicon

Silicon combines with molten iron

A stable FeSi 75 alloy is formed

Advanced furnace control systems ensure uniform chemical composition and high silicon recovery.

Crushing, Sizing, and Quality Control

After tapping and solidification, the alloy is crushed and screened into different particle sizes such as:

10–50 mm

10–100 mm

Customized sizes

Each batch of ZhenAn Ferro Silicon 75 undergoes:

Chemical analysis

Particle size inspection

Visual and physical quality checks

Mill Test Certificates (MTC) are provided upon request.

Why Choose ZhenAn Ferro Silicon 75?

As an experienced ferroalloy supplier, ZhenAn offers:

Stable silicon content ≥ 75%

Low carbon, phosphorus, and sulfur levels

Flexible size and composition customization

Reliable export packaging and logistics

Consistent supply for long-term contracts

Our Ferro Silicon 75 is widely exported to steel plants, foundries, and alloy manufacturers across global markets.

Packaging, Storage, and Delivery

Packaging options include:

1 MT / 1.25 MT jumbo bags

25 kg bags on pallets

Customized export packaging

Storage:
Store Ferro Silicon 75 in a dry, ventilated environment to maintain quality and performance.

Conclusion

From steel deoxidation to cast iron inoculation and alloy steel production, Ferro Silicon 75 plays an indispensable role in modern metallurgy. Its high silicon content, excellent deoxidation efficiency, and stable quality make it one of the most preferred ferroalloys worldwide.

With strict quality control and reliable supply capability, ZhenAn is committed to providing high-performance Ferro Silicon 75 tailored to your production needs.

Request a Quote from ZhenAn

Looking for a trusted Ferro Silicon 75 supplier with consistent quality and competitive pricing?

Contact ZhenAn today to receive:

Latest Ferro Silicon 75 price

Technical data sheet

Customized size & composition options

Visit https://www.metal-alloy.com/ to learn more about the product. If you would like to learn more about the product price or are interested in purchasing, please email market@zanewmetal.com. We will get back to you as soon as we see your message.