Fine Silicon Metal Powder
Overview
Premium Industrial Silicon Metal Powder: Engineered for High-Yield Metallurgy & Chemical Synthesis
Fine Silicon Metal Powder is produced from high-purity silicon metal through controlled crushing, milling, and classification processes. It is designed for industrial applications where both chemical stability and predictable particle behavior are required, especially in metallurgical, chemical, and refractory systems.
Unlike coarse silicon lumps or irregular crushed material, fine silicon powder is engineered to provide stable reactivity and consistent particle distribution, which directly affects downstream reaction efficiency and product quality.
Technical Specifications
Our Fine Silicon Metal Powder is manufactured from high-purity silicon ingots via inert-gas milling and advanced air classification. We eliminate batch-to-batch volatility by adhering strictly to ISO 9001:2015 quality management systems.
|
Element / Property |
Chemical Grade (High Purity) |
Metallurgical Grade (Standard) |
Refractory / PM Grade |
|
Silicon (Si) Min |
99.5% – 99.9% |
98.5% – 99.0% |
97.0% – 98.5% |
|
Iron (Fe) Max |
0.10% |
0.40% |
0.50% |
|
Aluminum (Al) Max |
0.10% |
0.20% |
0.30% |
|
Calcium (Ca) Max |
0.02% |
0.10% |
0.15% |
|
Moisture |
≤ 0.1% (inert dried) |
≤ 0.1% |
≤ 0.15% |
Precise Particle Size Distribution (PSD) Options
Rather than offering broad nominal mesh sizes, we define performance through predictable D50 and D90 parameters, ensuring stable reactivity profiles:
10–40 Mesh: Coarse reactive grade for specialized reduction
40–80 / 80–200 Mesh: General metallurgical alloy additives
200–325 Mesh (D50 ≈ 45 μm): High-surface-area chemical processing grade
Custom Micron / Sub-micron Powder: Tailored laser diffraction PSD profiles available upon request
Application Areas and Functional Roles
Organosilicon & Silane Synthesis (Chemical Grade)
In the Direct Synthesis (Rochow Reaction) of methylchlorosilanes, impurity control is critical.
• Catalyst poisoning prevention: Ultra-low Pb, Ca, and Al levels reduce catalyst deactivation and extend batch runtime
• Stable surface reactivity: Controlled ultra-fine fraction (<10 μm) reduces localized overheating and byproduct formation
• Higher silane yield consistency: Supports stable conversion efficiency in fluidized bed systems
Aluminum Alloy Production (Al-Si System)
• Homogeneous dissolution: Reduces silicon segregation and hard spot formation
• Higher recovery efficiency: Tight PSD control reduces slagging and burning losses during furnace charging
• Stable silicon recovery: Helps maintain recovery rates up to 95%+ under controlled process conditions
Refractories & Powder Metallurgy (PM)
• Antioxidant performance: In carbon-containing refractories, silicon reacts to form β-SiC or Si₃N₄, improving HMOR
• Improved sintering density: Enhances compaction behavior and reduces shrinkage variation during firing.
Strict Quality Assurance & Global Supply Chain Compliance
We mitigate international procurement risks through a transparent and audited manufacturing chain.
Raw material traceability: Each batch originates from verified quartz and carbon reduction sources
Advanced analytics: Every shipment is tested via ICP-OES and laser diffraction particle size analysis (Malvern)
Regulatory compliance: Fully compliant with REACH, RoHS, and supplied with GHS-aligned SDS documentation
Export packaging:
25kg multi-layer moisture-barrier valve bags
1 MT jumbo bags with PE liners
Optional nitrogen flushing for high-purity grades to reduce oxidation risk
Certificate
Packaging and Export Readiness
To prevent oxidation and moisture absorption during transport, the material is packaged in:
• 25 kg moisture-proof laminated bags
• 1-ton jumbo bags for bulk shipment
• Optional sealed drum packaging for high-purity grades
All packaging is designed for long-distance ocean freight and warehouse storage stability.
FAQ
Q: How do you ensure consistent particle size distribution (PSD) across shipments?
A: We use online laser diffraction particle sizing combined with multi-stage air classification. Instead of only mesh screening, each batch is controlled by D10, D50, and D90 tolerances, recorded in the COA for full traceability.
Q: How do you prevent oxidation and moisture absorption during ocean transport?
A: Final milling is performed under controlled inert gas conditions. For export packaging, we use multi-layer moisture-proof laminated bags with heat-sealed PE liners. For chemical-grade orders, vacuum sealing or nitrogen flushing in steel drums is available.
Q: Is your product compliant with REACH requirements for EU import?
A: Yes. We provide full REACH-compliant documentation and GHS-aligned Safety Data Sheets (SDS) for all shipments, ensuring smooth customs clearance and regulatory compliance.
Q: How does your silicon powder reduce catalyst poisoning in organosilicon production?
A: Trace elements such as Fe, Al, and Ca significantly affect the Rochow reaction. We control these impurities through high-purity raw ingots and contamination-minimized milling, keeping them below critical thresholds that affect catalyst activity and tar formation.
Q: Do you support third-party inspections like SGS or Intertek?
A: Yes. Buyers may arrange SGS, Intertek, or any accredited third-party inspection before shipment for independent sampling, chemical testing, and weight verification.
Q: What is your lead time for custom micron grades?
A: Standard mesh sizes are available from stock for immediate shipment. For custom micron or sub-micron PSD requirements, production lead time is typically 7–14 days after specification confirmation.
Commercial RFQ Checklist
To prepare a technical and commercial quotation, please provide:
• Required chemical grade (553 / 441 / 3303 or custom specification)
• Particle size range (e.g., 1–3 mm, 3–10 mm)
• Application type (aluminum alloying, steel deoxidation, chemical use)
• Estimated volume (trial + annual consumption)
• Preferred Incoterms and destination port
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