Ferro Silicon 75
Ferro ilicon is produced by smelting in an electric furnace using coke, steel scrap, and quartz (or silica sand) as raw materials. Silicon readily combines with oxygen to form silicon dioxide. Therefore, ferro silicon is commonly used as a deoxidizer in steel making. Simultaneously, the exothermic reaction of SiO₂ generation releases significant heat, enabling temperature elevation in molten steel during deoxidation while reducing energy consumption in steel making. As an alloying element additive, ferro silicon is extensively used in low-alloy structural steels, spring steels, bearing steels, heat-resistant steels, and electrical silicon steels.
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Product Introduction
Product Description
- Ferro ilicon is produced by smelting in an electric furnace using coke, steel scrap, and quartz (or silica sand) as raw materials. Silicon readily combines with oxygen to form silicon dioxide. Therefore, ferro silicon is commonly used as a deoxidizer in steel making. Simultaneously, the exothermic reaction of SiO₂ generation releases significant heat, enabling temperature elevation in molten steel during deoxidation while reducing energy consumption in steel making. As an alloying element additive, ferro silicon is extensively used in low-alloy structural steels, spring steels, bearing steels, heat-resistant steels, and electrical silicon steels.
- Ferro silicon 75 contains 72%–75% silicon, with the remainder primarily iron and trace impurity elements. Its key advantages include high silicon content with low impurities, high deoxidation and alloying efficiency, making it a critical raw material for high-end steelmaking, electrical steels, and precision casting.
Primary grades of ferro silicon
|
Grade |
Silicon Content (%) |
Maximum Allowable Impurity Content (%) |
Application Scenario |
|
FeSi75Al0.5 |
72.0~80.0 |
C≤0.10, S≤0.02, P≤0.02, Al≤0.5 |
High-end steelmaking deoxidation, special steel alloying |
|
FeSi75Al1.0 |
72.0~80.0 |
C≤0.10, S≤0.02, P≤0.02, Al≤1.0 |
Regular steelmaking deoxidation, cast iron inoculation |
|
FeSi75Al1.5 |
72.0~80.0 |
C≤0.10, S≤0.02, P≤0.02, Al≤1.5 |
Low-cost steelmaking deoxidation, casting inoculation |
|
FeSi65 |
60.0~70.0 |
C≤0.20, S≤0.03, P≤0.04 |
Low-end steelmaking, casting inoculation |
|
FeSi45 |
40.0~47.0 |
C≤0.20, S≤0.03, P≤0.04 |
Cast iron inoculation, low-silicon steel alloying |
Selection and Usage Guidelines
Grade selection
- Electrical steel: Prioritize FeSi75Al0.5 (low Al to reduce core loss).
- General deoxidation: FeSi75Al1.0 balances performance and cost.
- Cost-sensitive casting: FeSi75Al1.5 is economical.
Dosage control
- Steelmaking: ~3–5 kg per ton of steel (varies by steel grade and target Si content).
- Casting: 0.2%–0.5% of molten iron weight (adjust based on casting material and section thickness).
Feeding method
- Direct addition to ladle/tundish; use granular/pelletized FeSi75 for uniform distribution and rapid reaction.
- Avoid excessive moisture to prevent splashing during addition.
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