FeSi 68 Powder – Fine Ferro Silicon Powder for Heavy Media Separation & Welding
High-quality Ferro Silicon 68% in fine powder form. Specifically engineered for dense medium separation in mineral processing, welding electrode coatings, and chemical applications. Controlled particle size distribution for optimal performance.
| Main Composition | Si 68-71%, Al ≤2.0%, C ≤0.2%, P ≤0.04%, S ≤0.02% (typical impurities – fully customizable) |
| Form | Fine powder: -100 mesh, -200 mesh, -325 mesh. Custom particle size distributions available. |
| Application | Heavy media separation (coal, diamonds, iron ore), welding electrode coatings, chemical synthesis, powder metallurgy |
| Standard | GB/T 2272-2020, ASTM A100, ISO 5445 (customizable) |
FeSi 68 Powder – Product Overview
FeSi 68 Powder is a specialized fine-grade Ferro Silicon product with a silicon content between 68% and 71%. It is produced by milling high-quality ferrosilicon lumps to precise particle size distributions. Our FeSi 68 Powder is engineered for applications requiring fine particles, including dense medium separation in mineral processing, welding electrode coatings, and chemical synthesis. The controlled particle size and consistent chemistry ensure reliable performance in these demanding applications.
Product Core Advantages
- Controlled Particle Size: Available in multiple mesh sizes (-100, -200, -325) with tight distribution control for optimal performance.
- High Density: Ideal for creating stable heavy media slurries with specific gravity up to 3.5.
- Fully Customizable: Chemical composition and particle size distribution can be tailored to match your specific requirements.
- Consistent Quality: Produced under strict quality control to ensure uniform particle size and chemistry.
- Oxidation Resistant: Properly stabilized to minimize oxidation during storage and handling.
- Stable Supply: Produced in modern facilities with strict quality control from raw material to finished product.
Typical Application Areas
FeSi 68 Powder is essential in many specialized industrial processes:
- Heavy Media Separation (Dense Medium Separation): Used to create a heavy slurry for separating minerals based on density differences. Critical in coal beneficiation, diamond recovery, and iron ore processing.
- Welding Electrode Coatings: Added to electrode coatings to improve arc stability, deoxidation, and weld metal properties.
- Chemical Industry: Raw material for the production of silicon-based chemicals and intermediates.
- Powder Metallurgy: Used in the production of sintered components and magnetic materials.
- Briquetting: Fine powder can be briquetted for easier handling in steelmaking applications.
For specific application guidance or custom formulations, contact our technical team for personalized recommendations based on your production requirements.
Technical Specifications – FeSi 68 Powder & 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 68 Powder | 65-72 | ≤2.0 | ≤0.2 | ≤0.04 | ≤0.02 | Fine powder for heavy media, welding – fully 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 | Versatile for steel/foundry |
| FeSi 72 | 72-74 | ≤2.0 | ≤0.2 | ≤0.04 | ≤0.02 | Preferred for nodulizers |
| FeSi 75 | 75-80 | ≤1.5 | ≤0.2 | ≤0.04 | ≤0.02 | High-purity steelmaking |
| FeSi 85 | 83-88 | ≤1.0 | ≤0.1 | ≤0.03 | ≤0.01 | Special alloys, high-end applications |
| 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 |
* 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 | 1250-1380 (varies with Si content) | °C |
| Density (at 20°C) | 3.0-5.0 (depending on Si%) | g/cm³ |
| Appearance | Silvery-gray fine powder | - |
| Bulk Density (powder) | 2.0-3.0 (varies with mesh size) | g/cm³ |
Available Particle Sizes – Fully Customizable
- Standard mesh sizes: -100 mesh (≤150µm), -200 mesh (≤75µm), -325 mesh (≤45µm)
- Custom distributions: Available upon request, including narrow cuts or specific D10/D50/D90 values
- Other powder options: 0-2mm, 0-10mm for briquetting or specialized applications
Application Guidelines – FeSi 68 Powder
FeSi 68 Powder is a specialized material with the following primary applications:
Heavy Media Separation (Dense Medium Separation)
In mineral processing, FeSi powder is mixed with water to create a dense slurry with specific gravity typically between 2.5 and 3.5. This slurry is used in cyclones or baths to separate valuable minerals from gangue based on density differences. Key applications include coal beneficiation, diamond recovery, and iron ore processing. The controlled particle size and high density of our FeSi 68 Powder ensure stable slurry viscosity and sharp separation.
Welding Electrode Coatings
Added to the coating of welding electrodes (SMAW) and fluxes (SAW) to provide deoxidation, improve arc stability, and enhance weld metal properties. The fine particle size ensures homogeneous mixing and consistent coating application.
Chemical Synthesis
Used as a raw material for the production of silicon-based chemicals, including silanes and silicones. The fine particle size increases surface area for faster reaction kinetics.
Powder Metallurgy
Incorporated into powder metal blends for the production of sintered components requiring silicon alloying.
Briquetting
FeSi powder can be compacted into briquettes for easier handling and addition in steelmaking and foundry applications, reducing dust losses and improving recovery.
Typical Usage Parameters (Heavy Media)
For heavy media separation, FeSi powder is typically used at concentrations of 50-60% by weight in water to achieve the desired specific gravity. Our technical team can assist with optimal particle size selection for your specific separation process.
Packaging & Logistics – FeSi 68 Powder
Packaging Options
We offer various packaging solutions to meet different customer requirements and ensure product integrity during transportation:
- 1‑ton Jumbo Bags: Common option for large-volume users, easy to handle.
- 25kg / 50kg Bags: For smaller operations or precise batching.
- Moisture-Proof Liners: Available for all packaging options to prevent oxidation.
- Custom Packaging: We can accommodate special packaging requests, including steel drums or FIBCs with discharge spouts.
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 |
Download Center
Access our technical documentation for detailed product information:
Frequently Asked Questions – FeSi 68 Powder
What is the typical particle size distribution for FeSi 68 Powder used in heavy media separation?
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For heavy media separation, -100 mesh (≤150µm) is commonly used. For finer control and faster settling, -200 mesh (≤75µm) or -325 mesh (≤45µm) may be preferred. The optimal size depends on the specific application (cyclones vs. baths) and the desired separation density. We can provide custom distributions to match your process requirements.
Can you customize the silicon content or impurity levels in FeSi 68 Powder?
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Yes, absolutely. While our standard FeSi 68 Powder has Si 65-72% and standard impurity levels, we can adjust the chemistry to meet your specific requirements. For welding applications, lower Al and Ca may be desired. Please discuss your needs with our technical team.
How is FeSi Powder different from FeSi lumps for heavy media?
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FeSi lumps (typically 10-100mm) are used for melting in steelmaking. FeSi Powder is specifically milled for heavy media separation, where the fine particles create a stable suspension in water. The powder must have the correct particle size distribution to maintain the desired slurry density without excessive settling.
Is it possible to entrust a third-party inspection to check the quality before shipment?
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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?
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Absolutely. Every batch of FeSi Powder is tested in our ISO 17025 accredited laboratory, and a Certificate of Analysis (COA) showing Si, Al, Ca, C, P, S, and particle size distribution is provided with the shipping documents.
What is your production capacity for FeSi 68 Powder?
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We have an annual production capacity exceeding 30,000 metric tons of ferrosilicon powder across various grades and mesh sizes. We can accommodate both containerized and bulk vessel shipments.
Why Choose Our Ferro Silicon
20+ Years Experience
Specialized in ferroalloy production with deep industry knowledge
Strict Quality Control
Every batch tested to ensure consistent composition and performance
Global Delivery
Reliable logistics network ensuring timely delivery worldwide
Quality & Production Showcase
Explore our quality control process, production facilities, and customer interactions
Various Ferro Silicon Grades Comparison
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