Silicon Iron 65/75 | High Purity FeSi Flakes & Granules for Alloy Steel, Foundry

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.

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.

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.

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

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.

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.

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

• 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

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.

• 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

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.

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.