High Carbon Ferro Silicon 70
Product Overview
Ferrosilicon 70 (FeSi70) is a silicon-iron alloy containing approximately 68%–72% silicon, widely used in steelmaking and iron foundries as a deoxidizer and silicon addition material.
It is positioned between FeSi65 and FeSi75, offering a practical balance between:
• Silicon content efficiency
• Process stability in furnace operations
• Cost per ton of steel treatment
FeSi70 is commonly used in EAF, BOF, and ladle refining processes, especially in large-scale continuous steel production.
Key factors in selecting FeSi70
Stable Deoxidation in Steel Tapping
During tapping and ladle transfer, oxygen control is critical for steel cleanliness.
FeSi70 reacts with dissolved oxygen to form stable silica compounds that move into slag, helping steelmakers:
• Reduce gas porosity in billets and slabs
• Improve internal steel cleanliness
• Maintain more stable oxygen levels between heats
Consistent Silicon Behavior in Furnace Operations
In industrial steelmaking, silicon recovery varies depending on:
• Furnace temperature
• Slag condition
• Feeding timing
FeSi70 is widely used because it provides more predictable silicon absorption compared to irregular silicon scrap materials, helping reduce adjustment work during refining.
Controlled Carbon Input for Steel Chemistry Balance
FeSi70 contains low carbon levels, allowing silicon addition without significantly affecting final carbon control.
It is widely used in:
• Structural steel
• Medium carbon steel
• HSLA steel grades
• Ductile iron production
Cost Efficiency for Bulk Steel Production
For steel mills and distributors, FeSi70 is often selected as a cost-performance grade between FeSi65 and FeSi75.
When ultra-low impurity specifications are not required, FeSi70 helps:
• Optimize alloy consumption per ton of steel
• Reduce over-spec material cost
• Maintain stable production output
Chemical Composition
|
Element |
Content |
|
Silicon (Si) |
68% – 72% |
|
Iron (Fe) |
Balance |
|
Carbon (C) |
≤ 0.15% |
|
Aluminum (Al) |
≤ 1.5% |
|
Calcium (Ca) |
≤ 0.8% |
|
Phosphorus (P) |
≤ 0.04% |
|
Sulfur (S) |
≤ 0.02% |
Values may vary slightly depending on furnace type and production batch.
Industrial Applications
Steelmaking Industry
Ladle deoxidation during tapping
Silicon adjustment in molten steel
Improving steel cleanliness and structural stability
Foundry Industry
Promotes graphite formation in cast iron
Reduces carbide formation (chill risk)
Improves mold filling and reduces casting defects
Particle Size & Packaging
To match different feeding systems:
10–100 mm lumps: furnace charging
3–10 mm granules: controlled addition systems
Custom sizing available for distributors
Packaging:
1MT / 1.25MT jumbo bags
PE inner liner for moisture protection during sea shipment
Quality Control & Traceability
Each production batch is controlled through:
Heat number tracking system
XRF chemical analysis per batch
Particle size inspection before shipment
COA provided for every delivery
SGS / BV / Intertek inspection available upon request
Certificate
FAQ
Q: What is the main difference between FeSi70 and FeSi75?
A: FeSi75 has higher silicon content and is used for higher purity requirements. FeSi70 provides a better balance between cost and performance for large-scale steel production.
Q: Can FeSi70 be used in EAF and BOF processes?
A: Yes. It is commonly used in both processes, mainly during tapping and ladle refining stages.
Q: What particle size is recommended?
A: Lumps are used for furnace charging, while granules are used for controlled ladle addition. Selection depends on feeding system.
Q: What quality documents are provided?
A: Each shipment includes COA, batch chemical report, and optional third-party inspection reports (SGS/BV/Intertek).
Q: Is silicon recovery fixed?
A: No. Recovery depends on furnace conditions, slag composition, and feeding timing. FeSi70 provides more stable behavior under normal industrial conditions.
Q: How is FeSi70 packaged for export?
A: Standard export packaging is 1MT or 1.25MT jumbo bags with moisture-resistant inner liners for sea transport.
Hot Tags: high carbon ferro silicon 70, China high carbon ferro silicon 70 manufacturers, suppliers, factory, Export Grade Standard Ferro Silicon, High Purity Ferro Silicon Lump, High Purity High Carbon Ferro Silicon, Inoculant Ferro Silicon for Ductile Iron, Refined Inoculant Ferro Silicon, Standard Ferro Silicon Briquette
You Might Also Like
Send Inquiry