What is another name for ferrosilicon

Jul 23, 2025

It's also sometimes referred to simply as FeSi, based on its chemical symbols (Fe for iron and Si for silicon).

Additionally, depending on its silicon content, it may be specified as:

Ferrosilicon 75 (containing ~75% silicon)

Ferrosilicon 72 (containing ~72% silicon)

These names are commonly used in metallurgy and industrial applications.

1. Steelmaking & Metallurgy

Deoxidizer: Removes oxygen from molten steel to prevent porosity and improve quality.

Alloying Agent: Adds silicon to steel, enhancing properties like strength, hardness, and corrosion resistance (e.g., in stainless steel, electrical steel).

Inoculant: Used in cast iron production to improve graphite formation, enhancing machinability and durability.

2. Foundry Industry

Used in cast iron production to control graphite formation, improving mechanical properties.

Helps produce ductile iron (nodular cast iron) by promoting spherical graphite structures.

3. Magnesium Production

Acts as a reducing agent in the Pidgeon process to extract magnesium from dolomite.

4. Welding Electrodes

Added to welding rods to improve arc stability and weld quality.

5. Semiconductor & Solar Industry

High-purity ferro silicon is used in solar-grade silicon production for photovoltaic cells.

6. Other Applications

Military & Explosives: Used in some incendiary devices due to its heat-generating properties.

Hydrogen Production: Can be used in reactions to produce hydrogen gas.

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