FeSi

 

Ferrosilicon is an iron-silicon ferroalloy used as a silicon-bearing material in steelmaking, foundry production and other metallurgical processes.

Compared with large FeSi lumps, smaller granules provide a more controlled particle-size range and can be easier to weigh or feed in processes that require smaller additions. The correct size should be selected according to your charging method, treatment process and required dissolution behavior.

For high-silicon FeSi product information, you can also review our high-purity ferrosilicon product page.

 

The following grades and chemical limits are based on the current product specification. Final batch chemistry should be confirmed according to the agreed purchase specification and inspection results.

Specification note: These values follow the current product-page reference. If your production requires tighter impurity limits, send the required maximum values with your inquiry.

 

Particle size is one of the main characteristics that distinguishes this product from standard large ferrosilicon lumps. The current size ranges include:

When particle-size consistency is important, specify the required range together with acceptable fines or oversize limits before production.

 

The main difference between FeSi70, FeSi72 and FeSi75 is the silicon concentration. A higher-Si grade supplies more silicon per kilogram of alloy, so the required alloy addition can change even when the target silicon input is the same.

The grade should not be selected from silicon content alone. Actual recovery, impurity limits, particle size, addition method and total cost should also be considered.

 

For processes where ferrosilicon is used to increase silicon content, a basic mass-balance estimate can be used before final production adjustment.

Because FeSi75 contains more silicon per kilogram than FeSi70 or FeSi72, a smaller alloy mass may be required for the same theoretical silicon input. Actual consumption depends on your process conditions.

 

Ferrosilicon granules are suitable where a small and controlled FeSi particle size is preferred. Typical metallurgical uses include:

• Silicon addition in steelmaking
• Deoxidation applications
• Cast iron chemistry adjustment
• Foundry treatment where controlled FeSi particle size is required
• Blending with other metallurgical materials

For foundry applications involving smaller ferrosilicon particles, see our ferrosilicon particle and inoculant guide .

 

The particle-size range affects weighing, handling, feeding and dissolution behavior. Fine and coarse ferrosilicon should therefore not automatically be treated as equivalent products.

Very fine material can create more dust and handling loss, while excessively large particles may not suit a process designed for small controlled additions. The correct range depends on the charging equipment and metallurgical process.

For repeat orders, buyers should also confirm fines and oversize control so the delivered size distribution remains consistent from batch to batch.

 

Packing can be selected according to the product size, order quantity and handling requirements.

 

For small-size ferrosilicon, both chemistry and particle-size distribution should be checked before shipment.

• Actual silicon content
• Agreed impurity limits
• Particle-size distribution
• Fines and oversize when specified
• Batch consistency
• Packing condition
• Batch inspection or COA confirmation

 

We can confirm the required FeSi grade, particle size, impurity limits, packing and regular purchasing plan according to your process requirements.

 

We support ferrosilicon production, processing, particle-size control, inspection and packing for metallurgical applications. Before shipment, the agreed chemistry and particle-size requirements can be confirmed according to the order.