SILICA FUME Factory & Quality
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Silica Fume Factory & Manufacturer in China
— High-Performance Microsilica Production & Supply
Source silica fume manufacturer with 5 own factories and 11,000 tons/year capacity in China. Certified ISO 9001/14001/45001, CNAS and IAF. Densified & undensified products supplied directly from factory.
Image · Factory Overview
Chengdu, Sichuan, China
5 silica fume factories in China
Production · QC · Logistics5 Departments, All Under One Roof
Raw fume in, sealed container out.
11,000+ Tons Capacity Per Year
ISO 9001:2015 certified production since 2008. Factory-direct undensified & densified silica fume, shipped to 40+ countries. Detailed specs available on request.
| Annual capacity | 11,000+ tonnes / year |
|---|---|
| Product forms | Undensified & Densified silica fume · Zirconium-bearing silica fume · Low-Cl silica fume |
| SiO₂ grades | 82% – 99% SiO₂, customizable pH available 99% |
| Certification | ISO 9001:2015 |
| Manufacturing history | 13+ years original manufacturer Est. 2008 |
| Bagging options | 25 kg small bags · 600 kg jumbo (undensified) · 1,000 kg jumbo (densified) · kraft paper · custom logo OEM |
| Packaging features | Palletized, stretch-wrapped, moisture-proof liner, forklift-ready |
| Shipping terms | FOB price list + freight to your port · container loading available |
| Quality documents | TDS & COA available on request |
| Export reach | Shipped to 40+ countries |
Quality Control
In-house lab · full suite to ASTM C1240 / EN 13263 / GB/T 27690 · 8 tests per lot · per-shipment COA
Raw Silo Sampling
Per silo, top/mid/bottom
Daily In-process
Fineness, moisture on-line
LOI & Activity
Per ASTM C1240
XRF Composition
SiO₂, Fe₂O₃, Al₂O₃
Lab Retain Sample
6-month archive
Pre-shipment COA
Issued & sealed with batch
Test Items & Pass Criteria
ASTM C1240 / EN 13263 / GB/T 27690| Test Item | Method / Standard | Pass Criterion | Frequency |
|---|---|---|---|
| SiO₂ content | XRF · ASTM C114 | ≥ 94% (94U grade) · ≥ 85% ASTM C1240 minimum | ✓Every batch |
| LOI (Loss on ignition) | Gravimetric ignition | ≤ 4% (94U) · ≤ 2% (95U) · ≤ 6% ASTM max | ✓Every batch |
| Bulk density | ASTM C1240 | 300–380 kg/m³ (undensified) · 600–680 kg/m³ (densified) | ✓Every batch |
| Specific surface area | BET N₂ adsorption · ASTM C1240 | ≥ 15 m²/g (typical 15–20 m²/g) | ✓Every batch |
| Moisture | Oven drying, 105 °C | ≤ 1.5% (ASTM max 3.0%) | ✓Every batch |
| Activity index 28 d | ASTM C1240 | ≥ 110% (94U control) | ✓Monthly composite |
| Chloride / SO₃ | Wet chemistry | Cl⁻ ≤ 0.1% (low-Cl series ≤ 0.05%) · SO₃ ≤ 2.0% | ✓Monthly composite |
| Particle size D50 | Laser diffraction | 0.1–0.3 µm | ✓Per lot |
Certifications
ISO 9001 · ISO 14001 · ISO 45001 — issued by NOA Testing & Certification Group (CNAS-accredited).
Shipping Show & Packaging
Live from the shipping show floor · plus the four ways we pack it. Watch the on-site video, then pick the packaging that fits your project.
On Site at the Shipping Show 2026
Booth walkthrough filmed at the show · same containers sealed in our yard and sailing that week.
View All Shipping Videos→
View details →Palletized Small Bags
25 kg bags stacked on pallets — forklift-ready and container-efficient.
View details →Kraft Paper Bags
Moisture-proof kraft bags with inner PE liner — easy to carry on site.
View details →Jumbo Bags (FIBC)
600 kg undensified · 1,000 kg densified · top filling spout, bottom discharge.
View details →Custom Logo Packaging
Your logo, bag design and marking — OEM service for your own brand.
GET A QUOTE
All-Grade Price List, Within 24 Hours
One form, twelve grades. A sales engineer replies with the full FOB price list + freight to your port — or just the grades you mark.
- ✔Full 12-grade price list as PDF
- ✔Free samples of the grades you shortlist
- ✔Engineer helps you pick if you're between grades