Ferrosilicon 75% Price | Trusted FeSi 75 Supplier for Steel Mills
Reliable exporter of high-purity Ferrosilicon 75 (FeSi 75). Get competitive factory pricing, tailored particle sizes, and on-time worldwide delivery for your deoxidation and alloying needs.
| Main Composition | Si 75-80%, Al ≤1.5%, C ≤0.2%, P ≤0.03%, S ≤0.003% (typical impurities, fully customizable) |
| Form | Lumps (10-50mm), Granules (3-10mm), Powder (0-2mm, 0-10mm, -100 mesh, -200 mesh). Custom sizes available. |
| Application | Deoxidation in high-grade steelmaking, production of electrical steels, alloying agent in stainless steel, foundry inoculants |
| Standard | GB/T 2272-2020, ASTM A100, ISO 5445 |
Ferro Silicon 75 – Product Overview
Ferrosilicon 75 (FeSi 75%) is a high-grade master alloy with a silicon content between 75% and 80%. It is produced by carbothermic reduction of high-purity quartz and iron sources in submerged arc furnaces. Our Ferro Silicon 75 offers a well-balanced impurity profile with lower aluminum and calcium, making it particularly suitable for high-grade steel deoxidation, electrical steel production, and applications requiring minimal non-metallic inclusions.
Product Core Advantages
- High Purity: Minimum 75% Si with tightly controlled impurities (Al ≤1.5%, C ≤0.2%) for consistent performance in critical metallurgical applications.
- Fully Customizable: Chemical composition and particle size can be tailored to match your specific melting or injection requirements.
- Low Impurity: Lower Al and Ca content reduces slag formation and improves steel cleanliness.
- Custom Sizing: Available in lumps, granules, or powder to optimize dissolution rate and recovery.
- High Silicon Content: Ideal for applications where maximum silicon addition with minimal iron introduction is desired.
- Stable Supply: Produced in modern submerged arc furnaces with strict quality control from raw material to finished product.
Typical Application Areas
Ferro Silicon 75 is essential in many industrial processes:
- High-Grade Steel Deoxidation: Added to molten steel for efficient oxygen removal with minimal impurity introduction.
- Electrical Steels (Grain-Oriented & Non-Oriented): Primary silicon source for silicon steels used in transformers and motors.
- Stainless Steel Production: Alloying agent to improve oxidation resistance and mechanical properties.
- Specialty Cast Irons: Used in the production of high-silicon cast irons with enhanced corrosion resistance.
- Welding Electrodes & Fluxes: As a coating component or core wire alloy.
For specific application guidance or custom formulations, contact our technical team for personalized recommendations based on your production requirements.
Technical Specifications – Ferro Silicon Grades (Customizable)
Our Ferro Silicon is produced to meet international standards with strict quality control. Below is the chemical composition of our primary grades. All specifications (Si content, impurities, size) can be adjusted to your needs.
Chemical Composition (Typical Values, % by weight)
| Grade / Designation | Si (%) | Al (%) | C (%) | P (%) | S (%) | Other remarks |
|---|---|---|---|---|---|---|
| FeSi 75 | 75-80 | ≤1.5 | ≤0.2 | ≤0.04 | ≤0.02 | High-purity steelmaking, customizable |
| FeSi 65 | 65-70 | ≤3.0 | ≤0.5 | ≤0.04 | ≤0.02 | Standard grade for bulk use |
| FeSi 70 | 70-72 | ≤2.0 | ≤0.2 | ≤0.04 | ≤0.02 | Higher Si for special alloys |
| FeSi 72 | 72-74 | ≤2.0 | ≤0.2 | ≤0.04 | ≤0.02 | Preferred for nodulizers |
| FeSi 85 | 83-88 | ≤1.0 | ≤0.1 | ≤0.03 | ≤0.01 | Special alloys, FeSiMg |
| High‑Purity FeSi 76-79 (Ultra‑low Al/B/Ti/C) | 76-79 | ≤0.01 | ≤0.015 | ≤0.015 | ≤0.003 | B≤0.002%, Ti≤0.02%, V≤0.003% – for grain-oriented electrical steels, high‑end alloys |
| FeSi 68 Powder | 68-71 | ≤2.0 | ≤0.2 | ≤0.04 | ≤0.02 | Fine powder for injection, welding |
* All values are typical and can be adjusted per customer request. Impurity limits (Al, Ca, C, etc.) are flexible depending on application.
Physical Properties
| Property | Value | Unit |
|---|---|---|
| Melting Point | 1300-1400 (varies with Si content) | °C |
| Density (at 20°C) | 2.8-4.5 (depending on Si%) | g/cm³ |
| Appearance | Silvery-gray metallic lumps / granules / powder | - |
| Bulk Density (lumps) | 2.5-3.5 | g/cm³ |
Available Sizes – Fully Customizable
- Ferro Silicon Lumps: 10-50mm(standard), 10-100mm, 50-100mm, any custom range available
- Granules: 3-10mm, 1-3mm, 0.2-1mm
- Powder: 0-2mm, 0-10mm, -20 mesh, -40 mesh, -100 mesh, -200 mesh, -325 mesh
- Custom Sizes: Available upon request to meet specific process requirements (injection, briquetting, etc.)
Application Guidelines – Ferro Silicon 75
Ferro Silicon 75 is a versatile material with the following primary applications:
High-Grade Steel Deoxidation
Added to molten steel (typically in ladle or furnace) for efficient oxygen removal. The higher silicon content and lower impurities make FeSi 75 ideal for clean steel production where non-metallic inclusions must be minimized.
Electrical Steel Production
Primary silicon source for grain-oriented and non-oriented electrical steels used in transformer cores, motors, and generators. Our FeSi 75 can be supplied with extremely low Al, Ti, and B for these demanding applications.
Stainless & Specialty Steel Alloying
Used to adjust silicon content in stainless steels and heat-resistant alloys, improving oxidation resistance and high-temperature strength.
Foundry Inoculants
Base material for high-performance inoculants used in gray and ductile iron production, particularly when low aluminum content is required.
Production of High-Purity Alloys
Ultra-low Al/B/Ti/C grade (76-79% Si) is specifically designed for grain-oriented electrical steels and specialty magnetic alloys.
Typical Addition Rates (Steel)
In steelmaking, addition rates typically range from 1 to 6 kg per ton of steel depending on the target silicon content and deoxidation practice. Our technical team can assist with optimal sizing and addition practices.
Usage & Best Practices for FeSi 75
Optimizing the addition of Ferro Silicon 75 (FeSi 75) is critical to achieving maximum recovery, consistent steel quality, and cost efficiency. Below are practical guidelines for steelmakers, foundry operators, and metallurgists.
1. Recommended Addition Method
- Timing: Add FeSi 75 to the ladle after tapping (during ladle filling) or during secondary refining. Avoid adding directly into the electric arc furnace (EAF) before tapping, as this leads to excessive oxidation and lower recovery.
- Addition point: Introduce the alloy into the turbulent zone of the molten steel stream to ensure rapid mixing and dissolution.
- Order with other alloys: Add deoxidizers (e.g., Al or Mn) before FeSi 75 to reduce the oxygen potential, which improves silicon recovery.
- For injection systems: Use fine granules (0.2–1mm) with carrier gas (argon or nitrogen) at controlled feed rates to avoid clogging and ensure uniform distribution.
2. Recommended Dosage (Addition Rate)
Typical addition rates per metric ton of liquid steel (based on target silicon increase):
| Steel Type | Target Si Increase (%) | FeSi 75 Addition (kg/t steel) | Note |
|---|---|---|---|
| Plain carbon steel | 0.10 – 0.20 | 1.5 – 3.0 | Deoxidation only |
| Low-alloy / spring steel | 0.30 – 0.60 | 4.0 – 8.0 | For mechanical properties |
| Electrical steel (non-oriented) | 0.50 – 1.50 | 8.0 – 22.0 | High purity grade required |
| Ductile iron (inoculation) | 0.05 – 0.15 | 0.5 – 1.5 | Fine granular (0.2–1mm) preferred |
* The above values are typical starting points. Actual additions depend on initial Si content, furnace type, and target analysis. We recommend conducting a trial heat to fine-tune your specific practice.
3. Temperature Control & Silicon Recovery
- Optimal tapping temperature: 1550°C – 1600°C. Lower temperatures reduce dissolution and recovery; higher temperatures increase oxidation loss.
- Recovery rate expectations: With proper practice, silicon recovery from FeSi 75 typically ranges 85% – 92%. Factors affecting recovery include steel oxygen content, slag basicity, and addition method.
- To maximize recovery:
- Use a deoxidized bath before adding FeSi 75.
- Avoid excessive ladle stirring after addition (prolonged stirring increases re-oxidation).
- Add in one or two large pieces rather than many small ones for better penetration into the melt.
- Fading of inoculation effect: In foundry applications, the inoculation effect of FeSi 75 fades over time. The maximum effectiveness is achieved within 5–8 minutes after addition; pour the metal as soon as possible.
4. Critical Precautions & Troubleshooting
⚠️ Important Storage & Handling Notes
- Moisture sensitivity: FeSi 75 lumps and powder absorb moisture, which can cause steam explosions when added to molten steel. Always store in a dry place and pre-heat at 120–150°C for 1–2 hours before use if any dampness is suspected.
- Aluminum content: High Al (>1.5%) can lead to alumina inclusions in the final steel, affecting cleanliness and mechanical properties. For critical grades, specify low-Al FeSi 75 (≤1.0% or ≤0.5%).
- Sulfur and phosphorus: Excessive S or P will degrade toughness and weldability. Our standard FeSi 75 has S ≤0.02% and P ≤0.04%, meeting most steel specifications. Tighter limits available on request.
- Particle size selection:
- Large furnaces (EAF, BOF): 10–50mm lumps are ideal.
- Ladle injection / wire feeding: 0.2–2mm powder or granules.
- Foundry inoculation: 0.2–1mm for rapid dissolution and uniform distribution.
5. Common Quality Issues & How to Avoid Them
| Issue | Possible Cause | Preventive Action |
|---|---|---|
| Low silicon recovery (<80%) | High oxygen in steel / too low tapping temp | Improve deoxidation before FeSi addition; ensure temp ≥1550°C |
| Inclusions / slag entrapment | High Al or Ca in FeSi; excessive stirring | Specify low-Al/Ca grade; minimise stirring after addition |
| Inoculation fading (foundry) | Long holding time after addition | Add FeSi as late as possible; pour within 5-8 minutes |
| Uneven Si distribution in steel | Lump size too large / poor mixing | Use appropriate lump size (10-50mm) and ensure sufficient stirring |
📌 Need personalized guidance for your specific steel grade or melting practice? Our metallurgical team is available to help you optimize addition rates, select the right particle size, and troubleshoot any quality concerns. Contact our technical support or request a quote with your target chemistry, and we’ll provide a tailored recommendation within 24 hours.
Packaging & Logistics – Ferro Silicon 75
Packaging Options
We offer various packaging solutions to meet different customer requirements and ensure product integrity during transportation:
- 1‑ton Jumbo Bags: Common option, easy to handle with standard equipment.
- 25kg / 50kg Bags: For smaller orders or specific application requirements (e.g., foundries).
- Custom Packaging: We can accommodate special packaging requests, including moisture-proof liners, steel drums, or small boxes for powder.
Logistics Information
| Parameter | Details |
|---|---|
| Minimum Order Quantity | 20 metric tons (trial orders possible, subject to availability) |
| Lead Time | 15-20 days after order confirmation |
| Port of Loading | Main Chinese ports (Tianjin, Shanghai, Qingdao, Huangpu) |
| Shipping Options | FOB, CIF, CFR, DAP (depending on destination) |
| Payment Terms | T/T, L/C at sight, or negotiable |
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Frequently Asked Questions – Ferro Silicon 75
What is the advantage of using Ferro Silicon 75 over lower silicon grades? +
FeSi 75% offers higher silicon content per unit weight, which means less material handling and lower iron introduction into the steel. It also typically has lower impurity levels (Al, Ca, C), making it preferred for clean steel applications and electrical steels where tight chemistry control is required.
Can you supply Ferro Silicon 75 with extremely low aluminum and titanium for electrical steels? +
Yes, absolutely. Our high-purity FeSi 76-79 grade offers Al ≤0.01%, B ≤0.002%, Ti ≤0.02%, and C ≤0.015%, specifically designed for grain-oriented electrical steels and other demanding applications. We can tailor the chemistry to your exact specifications.
What sizes are best for ladle injection in steelmaking? +
For injection, fine granules or powder in the range of 0.2-1mm or 0-2mm are typically used to ensure rapid dissolution and consistent feeding. We can supply any custom size distribution to match your injection equipment.
Is it possible to entrust a third-party inspection to check the quality before shipment? +
Certainly, we support third-party inspections by internationally recognized quality inspection agencies such as SGS and BV to verify product quality before shipment. The inspection covers product appearance, weighing, dimensions, and chemical composition analysis. The entire inspection process will be documented with photos and written records, which will be provided to you together with the final inspection report. This ensures you have no concerns regarding product quality.
Do you provide a certificate of analysis with each shipment? +
Absolutely. Every batch of Ferro Silicon is tested in our ISO 17025 accredited laboratory, and a Certificate of Analysis (COA) showing Si, Al, Ca, C, P, S, and other elements (B, Ti on request) is provided with the shipping documents.
What is your production capacity for Ferro Silicon 75? +
We have an annual production capacity exceeding 80,000 metric tons of ferrosilicon across various grades, including FeSi 75, 65, 70, 72, 85, and high-purity specialties. We can accommodate both containerized and bulk vessel shipments.
What size of ferro silicon lumps is best for my application? +
The most commonly used ferro silicon lumps are 10-50 or 10-60mm for standard furnace and ladle addition. For larger furnaces, 10-100mm lumps may be preferred. The optimal size depends on your furnace type, addition method, and target dissolution rate. Contact our technical team for a personalized recommendation based on your steelmaking process.
What is the current ferro Silicon 75 price today? How to get a quotation? +
Ferro silicon price varies based on silicon content (e.g., FeSi 65,FeSi 68,FeSi 70, FeSi 72, FeSi 75, FeSi 85,high purity FeSi 76-79), quantity, particle size, and delivery terms (FOB/CIF). For the latest ferroSilicon 75 price, please submit a quotation request with your specifications. We respond within 24 hours with a detailed offer including chemical analysis report.
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