Industrial Silicon Iron 55/65 | FeSi for Steel, Electric Arc Furnace & Chemical

In electric arc furnace (EAF) steelmaking and chemical-grade metallurgy, unstable silicon recovery, excessive slag formation, and impurity contamination remain persistent challenges. Inaccurate silicon addition can directly impact steel cleanliness, alloy consistency, and downstream processing efficiency.

Industrial Silicon Iron 55/65 (FeSi 55–65%) supplied by ZhenAn is engineered to address these issues. With controlled silicon content, low impurity levels, and a wide particle size range from 10–220mm, this grade delivers predictable deoxidation behavior and reliable silicon input for steel, alloy, and chemical applications.

Silicon Iron 55/65 is a medium-silicon ferroalloy containing 55–65% silicon (Si) with iron as the balance. It is specifically designed for industrial users requiring stable silicon yield rather than maximum Si concentration, making it ideal for controlled EAF operations and chemical-grade applications.

Typical Specification Overview

In EAF steelmaking, excessive silicon content may cause over-oxidation reactions and slag instability. FeSi 55/65 offers a balanced solution by providing sufficient silicon for deoxidation without excessive reactivity.

Key EAF Benefits:

• Predictable silicon recovery
• Reduced oxygen-related defects
• Improved steel cleanliness
• Better control of ladle metallurgy stages

For alloy steel producers, consistency is more critical than peak silicon content. Silicon Iron 55/65 enables precise silicon adjustment in:

• Structural steels
• Engineering steels
• Low-alloy steels

Its moderate Si level supports strength improvement and oxidation resistance without destabilizing alloy chemistry.

In the chemical industry, FeSi 55/65 is widely used as:

• A reducing agent
• A silicon source for chemical synthesis
• A raw material for silicate and specialty compound production

The low impurity profile ensures compatibility with chemical reactions requiring controlled metallurgical inputs.

ZhenAn supplies Industrial Silicon Iron 55/65 in multiple size ranges to match different industrial feeding systems:

• 10–50mm – Fast dissolution and fine control
• 10–100mm – Balanced melting and reaction rate
• 10–220mm – Controlled silicon release for large furnaces

This flexibility reduces material loss and improves furnace efficiency.

• Stable 55–65% Silicon Content – Designed for controlled metallurgical reactions
• Wide Size Range (10–220mm) – Adaptable to EAF, ladle, and chemical processes
• Low Sulfur & Phosphorus – Supports clean steel and chemical-grade use
• Electric Arc Furnace Production – Ensures uniform composition
• 30+ Years of Industry Experience – Trusted by global steel and alloy producers

ZhenAn manufactures Silicon Iron 55/65 using selected quartz and iron sources in electric arc furnaces. Strict control of:

• Smelting temperature
• Reduction time
• Granulation and screening

ensures consistent chemistry, stable particle size distribution, and industrial-grade reliability.

• Improved silicon utilization efficiency
• Reduced alloy over-consumption
• Enhanced steel and alloy consistency
• Lower risk of impurity-related defects
• Optimized EAF and ladle operation performance

Q1: What does 55/65 mean in Silicon Iron 55/65?
A1: It refers to the silicon content range, 55–65%, suitable for controlled deoxidation and alloying.

Q2: Why choose FeSi 55/65 instead of FeSi 75?
A2: FeSi 55/65 offers better control and lower reactivity, making it ideal for EAF steelmaking and chemical applications.

Q3: Is Silicon Iron 55/65 suitable for chemical industry use?
A3: Yes. Its low impurity content and stable silicon level make it suitable for metallurgical and chemical processes.

Q4: What particle size is best for EAF steelmaking?
A4: 10–100mm is commonly preferred, while larger furnaces may benefit from 10–220mm sizes.

Q5: How should FeSi 55/65 be stored?
A5: Store in a dry, covered environment to prevent oxidation and moisture absorption.

Industrial Silicon Iron 55/65 from ZhenAn delivers controlled silicon input, flexible particle sizing, and industrial-grade consistency. Designed for steelmakers, alloy producers, and chemical manufacturers, it supports efficient EAF operation, precise alloying, and dependable chemical processing. Backed by decades of metallurgical expertise, ZhenAn remains a trusted global supplier of ferroalloys.