Product Description
Silica Fume (Microsilica) is an ultra-fine amorphous silicon dioxide material collected as a by-product during the production of silicon metal or ferrosilicon alloys. Its extremely fine particle size and high reactivity make it widely used in refractory, steelmaking, foundry, and high-performance concrete applications.
Available in two grades—96% and 98% SiO₂—our silica fume products deliver superior performance in demanding applications. The ultrafine particles ensure excellent bonding, improved density, and enhanced durability.
Typical Applications
- Refractory castables and monolithic linings
- Ladle coatings and tundish mixes in steelmaking
- High-performance concrete & ultra-high-performance concrete (UHPC)
- Shotcrete and sprayed refractory applications
- Oil-well cementing and deep-water applications
- Metallurgical slag conditioning
- Anti-permeability improvement in concrete structures
- Anti-abrasion and strength enhancement coatings
Key Product Advantages
- Improves strength and density of refractory mixes
- Enhances fluidity and workability in applications
- Excellent pozzolanic reactivity for long-term strength gain
- Reduces porosity and permeability significantly
- Higher durability in thermal shock environments
- Improves corrosion resistance in steel structures
- Extends service life of refractory linings
- Cost-effective performance enhancement
Technical Specifications
Chemical & Physical Analysis – Silica Fume Comparison
| Property | Silica Fume 96% | Silica Fume 98% | Frequency |
|---|---|---|---|
| SiO₂ (%) | >96.0 | >98.0 | Weekly |
| C (%) | <2.0 | <1.5 | Weekly |
| Fe₂O₃ (%) | <1.0 | <1.0 | Weekly |
| Moisture (%) | <2.0 | <1.0 | Weekly |
| Loss on Ignition (LOI, %) | <2.0 | <2.0 | Weekly |
| pH Value | 7–9 | 7–9 | Weekly |
| Retained on 45 µm Sieve (Undensified, %) | <1.5 | <1.0 | Weekly |
| Bulk Density – Undensified (kg/m³) | 200–350 | 200–350 | Weekly |
| Bulk Density – Densified (kg/m³) | 600–750 | 600–750 | Weekly |
📦 Packaging Options
Storage & Handling
- Store in a dry, ventilated warehouse
- Avoid moisture exposure and direct water contact
- Use dust control systems during handling and transfer
- Keep containers sealed when not in use
- Protect from humidity fluctuations
Shelf Life & Storage Conditions
Shelf Life: 12 months under recommended storage conditions. Maintains quality when stored in dry, cool environments with proper ventilation.
⚠️ Safety Information
Non-hazardous industrial mineral. Silica fume is safe for industrial use. However, avoid dust inhalation during handling—use protective masks and ensure adequate ventilation. Complies with international workplace safety guidelines and OSHA standards for worker protection.