Why Is Ferro Silicon 75 Used as a Deoxidizer in Steel?
Ferro Silicon 75 (FeSi 75) is widely used as a primary deoxidizer in steelmaking due to silicon's strong chemical affinity for oxygen. During steel production, dissolved oxygen in molten steel can cause non-metallic inclusions, internal defects, and reduced mechanical performance if not properly removed.
When Ferro Silicon 75 is added to molten steel, silicon rapidly reacts with oxygen to form stable silicon oxides, which are absorbed into the slag and removed from the steel bath. Compared with lower-grade ferro silicon, FeSi 75 provides:
Faster and more efficient deoxidation
Lower alloy consumption per ton of steel
Reduced slag volume and cleaner steel
Improved yield and production stability
Because of its high silicon content and low impurity levels, ZhenAn Ferro Silicon 75 is suitable for both electric arc furnace (EAF) and basic oxygen furnace (BOF) steelmaking processes.
How Is FeSi 75 Used in Cast Iron Production?
In cast iron production, FeSi 75 is primarily used as an inoculant and alloying additive. Its main function is to promote the formation of uniform graphite structures during solidification.
When added to molten cast iron:
Ferro Silicon 75 increases nucleation sites for graphite
Reduces chill tendency
Improves casting machinability and surface finish
Enhances mechanical properties and consistency
ZhenAn FeSi 75 is commonly used in gray iron and alloy cast iron to stabilize chemical composition and improve casting quality across different foundry processes.
Can Ferro Silicon 75 Be Used in Ductile Iron?
Yes. Ferro Silicon 75 can be effectively used in ductile iron production, particularly as a base inoculant or carrier alloy.
In ductile iron (nodular cast iron):
FeSi 75 helps control graphite morphology
Supports stable nodular graphite formation
Improves tensile strength and elongation
Reduces casting defects and variability
While specialized magnesium-bearing ferro silicon alloys are often used for nodulizing, Ferro Silicon 75 plays an important supporting role in post-inoculation and composition adjustment.
Why Choose ZhenAn Ferro Silicon 75 for Steel and Foundry Use?
ZhenAn supplies high-quality Ferro Silicon 75 with:
Stable silicon content ≥ 75%
Low carbon, phosphorus, and sulfur
Consistent particle sizing
Proven performance in steel plants and foundries
Our technical team supports customers with application guidance, ensuring optimal results in both steelmaking and ductile iron production.
Contact ZhenAn for Application Support
If you require technical recommendations for Ferro Silicon 75 deoxidation, cast iron inoculation, or ductile iron production, contact ZhenAn today.
ZhenAn – Your Reliable Partner for Ferro Silicon 75 Applications.
Visit https://www.metal-alloy.com/ to learn more about the product. If you would like to learn more about the product price or are interested in purchasing, please email market@zanewmetal.com. We will get back to you as soon as we see your message.
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We understand the common pain points in current product procurement:
•High local cost and unstable supply
•Long lead times affecting project schedules
•Incomplete product ranges
•Slow communication and lack of follow-up
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