Low Price Ferro Silicon 65 Economical

FerroSilicon 65 (abbreviated as FeSi 65) is a foundational ferroalloy with 63–68% silicon content (Si), balanced iron (Fe ≈30%) and controlled impurities. Distinguished by its cost-efficiency and versatile performance, it outperforms low-silicon grades (e.g., FeSi 45) in reactivity while being more affordable than high-purity FeSi 75.

FeSi 65 is produced via electric arc furnace smelting using three high-purity raw materials :

Silica stone: SiO₂ purity ≥97.5%, size 80–140mm (no dust/impurities).
Coke: Fixed carbon ≥82%, moisture <16%, size 8–18mm (acts as reducer).
Iron ore: Low-phosphorus grade to control impurities.
The core reaction follows:SiO₂ + 2C → Si + 2CO↑

Post-smelting, the alloy undergoes refining to remove excess aluminum (Al), calcium (Ca), and carbon (C), then is crushed into standard lumps (10–50mm) or processed into powder . This process ensures stable silicon content and minimal harmful elements.

FeSi 65% is the most widely used grade in mid-to-low value metallurgical processes, delivering measurable efficiency gains:

Steelmaking: Primary Deoxidation & Alloying

Deoxidation:

Added at 1.5–3.0kg/ton of steel during ladle tapping, Ferro Silicon alloy 65 reacts with dissolved oxygen (O) to form SiO₂ slag. It reduces O content from 80–100ppm to ≤25ppm, with 85%+ deoxidation efficiency .

Alloying:

For low-alloy structural steel (e.g., Q235), controlled Si addition (0.1–0.3%) boosts tensile strength by 10% without sacrificing ductility.

Casting: Inoculation for Gray & Ductile Iron

Gray Iron:

0.3–0.6% 65% FeSi (1–3mm grain) promotes Type A graphite formation, increasing tensile strength from 220MPa to 300MPa-ideal for machine tool beds .

Ductile Iron:

Post-magnesium nodularization, 0.1–0.2% FeSi #65 compensates for Si loss, raising spheroidization rate by 12% .

Metal Magnesium Smelting

FeSi 65 acts as a cost-effective reducer in the Pidgeon process, replacing expensive Ferro Silicon 75. It lowers raw material costs by 12% while maintaining 90%+ magnesium yield .

Match Size to Process:

Steelmaking: 10–50mm lumps (ladle addition, minimal waste).
Casting: 1–3mm grains (stream inoculation, uniform dispersion).
Specialty uses: 200+ Mesh powder (welding rods, flotation agents) .

Control Impurities:

Low-carbon steel: C ≤0.15% (avoid carburization).
Precision casting: Al ≤1.5% (prevent oxide defects).

Verify Quality:

Request third-party (SGS/BV) test reports for Si content and impurities.
Inspect lumps for consistent luster (no rust = fresh product) .

Contact us for a real-time quote-optimize your production costs with FerroSilicon 65!

The Foundry Efficiency Expert – Optimizing Cost & Performance

· Challenge: A large foundry group sought to optimize the cost-efficiency of their gray iron production for engine blocks without affecting machinability and thermal conductivity.
· Solution: Our technical team worked with them to fine-tune the silicon content using our standard FeSi72. We provided a consistent, lump-sized product ideal for their charge calculation and melting process.
· Results & Your Benefits:
· Achieved precise silicon recovery and predictable chemistry, minimizing additive waste.
· Optimized the charge mix, reducing overall alloying costs by 8%.
· Maintained excellent casting performance and machinability.
· Your Benefit: Reliable, cost-effective composition control and predictable melt outcomes.

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