70 Ferro Silicon Powder

70 FeSi Powder is a premium ferrosilicon powder with a silicon (Si) content of approximately 70%, primarily composed of silicon (Si) and iron (Fe), along with trace impurities such as aluminum (Al), calcium (Ca), manganese (Mn), phosphorus (P), sulfur (S), and carbon (C). It is processed into fine powder form through professional crushing, grinding, and screening, featuring uniform size distribution for excellent reactivity and mixing performance. Available in customizable sizes (e.g., 0~1mm, 1~3mm, 3~5mm, or fine powder grades as per requirements) and packaged in ton bags or customized packaging to meet customer storage and transportation needs. Widely used in steelmaking, casting, and alloy production, it is a key functional additive for improving product quality.

Core Properties

 High Silicon Content: With ~70% silicon, it exhibits strong oxygen affinity, enabling efficient deoxidation in molten metal.

 Powder Form Advantage: Larger specific surface area compared to lump ferro silicon, ensuring faster reaction speed, thorough mixing with molten steel/iron, and improved utilization rate.

 Low Impurity Level: Strict control over harmful impurities (P, S, etc.) avoids adverse effects on the performance of finished products such as steel and castings.

 Stable Performance: Consistent chemical composition and size ensure reliable application effects across batches.

Steelmaking Deoxidizer:

Quickly reacts with oxygen in molten steel to form silicon dioxide, effectively reducing oxygen content, minimizing oxide inclusions, and improving steel purity and mechanical properties (strength, toughness, etc.).

Casting Inoculant:

Promotes graphitization in cast iron, refines graphite structure, reduces casting defects (pores, slag inclusions), and enhances the strength, wear resistance, and castability of cast iron products.

Alloy Additive:

Used as a silicon source in the production of various ferroalloys and non-ferrous alloys, adjusting alloy composition to improve high-temperature resistance, corrosion resistance, and other specific properties.

Other Fields:

Can be used as a raw material in refractory materials (enhancing high-temperature stability) and welding materials (as a deoxidizer and flux to improve welding quality).

Our Ferro Silicon 70 Powder is manufactured and tested to meet or exceed stringent international specifications, ensuring its reliable performance in steelmaking, foundry, and alloy production. customer-defined requirements for silicon and trace elements.

Our commitment to quality, underpinned by an ISO 9001:2015 certified management system, includes:

Raw Material Control: We select high-purity quartz and iron sources to ensure consistency and minimize undesirable tramp elements like P and S.

Process Monitoring: Smelting parameters are precisely controlled to achieve the target silicon range (68-72%) and alloy homogeneity. The subsequent crushing, grinding, and screening processes are carefully managed to produce the exact particle size distribution required.

Finished Product Verification: Every batch undergoes comprehensive analysis. We verify the chemical composition (Si, Al, Ca, Mn, P, S, C) using advanced spectroscopic methods and confirm the size distribution using sieve analysis.

Full Traceability & Certification: A detailed Mill Test Certificate reporting the complete chemical analysis and size verification is provided with each shipment, ensuring full traceability and compliance with your specifications.

Supplying high-performance 70% Ferro Silicon Powder requires more than just meeting specifications; it demands a deep understanding of how our product performs in your specific process. Our team possesses extensive, hands-on experience in steelmaking and foundry operations, enabling us to act as a technical partner, not just a supplier.

Application-Specific Guidance: Whether you need to optimize deoxidation efficiency in your electric arc furnace or achieve the perfect inoculation result in your ductile iron, our metallurgists can provide guidance on addition rates, methods, and size selection.

Tailored Solutions: We recognize that your process may require a specific particle size distribution not listed. We offer flexible customization-from coarse powders for injection to finer grades for coreless furnaces-to perfectly match your handling and mixing equipment.

Problem-Solving Support: If you encounter challenges with dissolution rates, recovery, or final product quality, our technical team is available to collaborate and find solutions.

Q: Why should I choose 70% ferrosilicon powder over lumpy ferrosilicon for my application?
A: The choice depends on your process. 70 Ferro Silicon Powder is ideal when rapid reaction and thorough mixing are critical. Its high surface area allows it to dissolve and react much faster in molten metal, which is a key advantage for ladle injection, fine-tuning in refining stations, or as an inoculant where quick, uniform dispersion is needed. Lumpy ferrosilicon is typically used for additions during furnace tapping. We can help you determine the best form for your specific process.

Q: How do I select the right particle size for use as a casting inoculant?
A: For foundry inoculation, the goal is uniform dispersion and rapid dissolution without generating smoke or being carried away by the air. A common and effective size range is 1-3mm or 3-8mm. This ensures the powder sinks into the molten iron stream and dissolves evenly to promote effective graphite nucleation. For injection systems, a finer, tightly controlled size like 0-1mm is often required. We can customize the size to match your specific inoculation method (ladle, in-stream, mold).

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