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White Silica Fume (Microsilica) for High-Strength Concrete & Refractories
92%-95% SiO₂ | 88+ Whiteness | Factory Direct Supply | Stable Bulk Stock | 24h Quotation | Export to 30+ Countries
Why Global Buyers Choose Our Silica Fume
Stable Quality | Bulk Export | Professional Technical Support
High Purity
SiO₂ up to 95%, stable quality for high-performance concrete.
Stable Supply
Large-scale production, consistent monthly output.
Fast Delivery
3–7 days shipping for bulk orders worldwide.
Applications of Our Ultra-Pure White Silica Fume
Our white silica fume is engineered for high-performance applications across multiple industries
High-Strength Concrete
150 MPa compressive strength for extreme conditions
GFRC / UHPC
Improve density and durability for architectural concrete.
Refractory Materials
Enhance thermal resistance and stability.
Technical Specifications
| Item | Typical | Guaranteed |
| SiO2 (%) | 91-95 | ≥90 |
| SiO2+ZrO2 (%)+HfO2 (%) | 96-98 | ≥96 |
| Residue (+45 μm) | 0.1-0.2% | <1.0% |
| Moisture | 0.5-1.0% | —— |
| Loss on Ignition | 0.1-0.6 | —— |
| pH | 2-4 | —— |
| BET | 6-15 | —— |
| Whiteness | 90 | ≥88 |
Reliable Global Silica Fume Supplier
We are a professional exporter of white silica fume (microsilica) serving global construction, refractory, and high-performance concrete industries.
Strict Production Control
Every batch is controlled from raw material selection to furnace production and final packaging. Particle size, SiO₂ content, and moisture are tested before shipment.
Verified Testing System
Each shipment can be provided with COA (Certificate of Analysis), MSDS, and third-party inspection reports upon request.
Stable Bulk Supply
Continuous production capacity ensures stable monthly supply for long-term industrial contracts.
Global Export Experience
Export experience to USA, Europe, Middle East, and Southeast Asia with full documentation support.
Frequently Asked Questions
Find quick answers to common inquiries about our silica fume products.
What is silica fume used for?
Used in concrete, UHPC, GFRC and refractory applications.
Do you supply microsilica in bulk?
Yes, we support bulk and long-term contracts.
Can I get a sample?
Yes, free sample is available for evaluation.
What is your delivery time?
Usually 7-15 days depending on order size.
What is the minimum order quantity (MOQ)?
Free sample (1 kg) available, customer pays shipping. Bulk order MOQ is 20 tons.
What are the packaging options?
25kg / plastic bags, 500 kg/ jumbo bags, OR as per customer requirement.
Can I get bulk discount for large order?
Yes, of course.
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Minghong – China’s Premier Building Material Supplier, Free Samples Available.