Factory & Quality

SILICA FUME Factory & Quality

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.

5 silica fume factories

11,000 t/yr capacity

ISO 9001 / 14001 / 45001 · CNAS · IAF

Request COA + TDS Sample View Shipping Show

Image · Factory Overview Chengdu, Sichuan, China

5 silica fume factories in China

Production · QC · Logistics

5 Departments, All Under One Roof

Raw fume in, sealed container out.

Plant Overview · 30,000 m²

Raw Silo Storage

On-site QC Lab

Bagging Line

Container Yard

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.

Production Line 1

Production Parameters

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

Typical values from recent production batches · per-shipment COA on request · low-chloride series Cl⁻ ≤ 0.05% · zirconium grades (ZrO₂ series) follow a separate TDS.

EWD · 工厂页卡片4 — 证书墙 Certifications