Raw Kaolin Clay Powder Factory Price
Raw Kaolin Clay Powder – Factory Price
Kaolin, also known as china clay, is a naturally occurring hydrous aluminum silicate mineral formed by the weathering of feldspar-rich rocks. In its raw powder form it retains the mineralogical characteristics of the deposit, offering a low‑cost base material for processes that require controlled whiteness, fine particle size, and chemical stability.
Chemical Composition
The oxide makeup of raw kaolin determines its behavior in firing, slurry viscosity, and final product color. Typical values vary with deposit but fall within narrow ranges that are well documented for industrial grades.
| Component | Typical Range (wt %) |
|---|---|
| SiO₂ | 45 – 52 |
| Al₂O₃ | 34 – 40 |
| Loss on Ignition (LOI) | 12 – 14 |
| Fe₂O₃ | ≤ 0.5 |
| TiO₂ | ≤ 0.2 |
Physical Properties
Particle size distribution, brightness, and pH influence slurry rheology, casting performance, and final product appearance. These parameters are measured on representative samples before shipment.
| Property | Typical Value |
|---|---|
| D50 (laser diffraction) | 2.0 – 3.5 µm |
| Brightness (ISO 457, 457 nm) | 84 – 90 % |
| pH (10 % slurry) | 4.5 – 5.5 |
| Specific gravity | 2.60 – 2.65 g/cm³ |
Industrial Applications
Raw kaolin is chosen when the process tolerates modest variability in exchange for lower material cost. Its inherent whiteness and fine texture make it suitable as a filler or extender where high purity is not critical.
- Ceramic bodies – contributes to green strength and reduces firing shrinkage.
- Paper coating – improves opacity and ink hold‑out at lower cost than refined grades.
- Paint and coatings – functions as a pigment extender, enhancing viscosity stability.
- Rubber compounds – acts as a reinforcing filler that improves abrasion resistance.
- Fiberglass – provides a low‑cost source of alumina‑silica for glass formation.
Quality Control & Testing
Consistency is achieved through systematic sampling at the mine face, controlled drying, and milling to target particle size. Each batch undergoes a defined set of tests before release.
- X‑ray fluorescence (XRF) for major oxides.
- Laser diffraction for D10, D50, D90.
- Loss on ignition at 1000 °C to monitor moisture and organics.
- Brightness measurement under standardized lighting.
- Visual inspection for foreign particles and agglomerates.
Packaging & Handling
Raw kaolin is hygroscopic; moisture uptake can alter flow properties and increase energy consumption during drying. Packaging is therefore designed to limit exposure to ambient humidity.
- 25 kg multi‑wall paper bags with inner polyethylene liner.
- 500 kg bulk bags (FIBC) with spout top and bottom discharge, moisture‑barrier liner.
- Loose bulk in railcars or containerized bulk liners for large‑volume shipments.
All packages are marked with batch number, net weight, and a QR code linking to the corresponding test certificate.
Factory Price & Lead Time
Pricing is quoted ex‑works (EXW) and reflects the cost of mining, drying, milling, and quality assurance. Variables that influence the unit price include order volume, particle‑size specification, and packaging type.
| Parameter | Typical Range |
|---|---|
| Minimum Order Quantity | 5 t (full truckload) |
| Lead Time (after PO) | 10 – 18 weeks, dependent on stock and scheduling |
| Price Basis | USD per metric ton, EXW factory |
For exact pricing, provide the required tonnage, target D50, and preferred packaging. A formal quotation will be issued within two business days.
Request a Quote
To receive a detailed factory‑price offer, share your project specifications via the contact form. Our technical team will review the requirements and return a comprehensive quotation, including lead time and payment terms.
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