1. Industry Overview & Current Market Trends
The Hezhe Metakaolin Price Bulk Kaolin Clay Powder Price of kaolin per ton Importers China Clay 325 Calcined Kaolin Powder for Coating market is experiencing rapid growth due to increasing demand for high-performance fillers and pozzolanic materials in coatings, polymers, ceramic, paint, and construction industries. According to USGS (2023), global kaolin production reached 40 million metric tons, with China leading as the top producer and exporter. The shift towards sustainable construction has further accelerated the adoption of metakaolin due to its low carbon footprint and superior functional benefits.
- 2024 average kaolin price per ton (global): $120–$240/ton
- China Metakaolin Export Growth Rate: +8.5% (YoY)
- Top application sectors: coatings, concrete admixtures, paper, ceramics, adhesives
- Major importers: USA, EU, Southeast Asia, GCC
2. Product Specification Table
| Parameter | Specification | Test Standard |
|---|---|---|
| Product Brand | Hezhe Metakaolin Price Bulk Kaolin Clay Powder Price of kaolin per ton Importers China Clay 325 Calcined Kaolin Powder for Coating | -- |
| Type | Calcined Kaolin (Metakaolin) Powder (325 Mesh) | ISO 787/2 |
| SiO₂ Content | ~53.0% | GB/T 14563-2008 |
| Al₂O₃ Content | ≥43.0% | ASTM E276 |
| Particle Size (D50) | ≤2μm | ISO 13320 |
| Brightness (ISO) | ≥92% | ISO 2469 |
| pH (10% Slurry) | 5.0-7.0 | ISO 787/9 |
| Specific Gravity | 2.6 g/cm³ | ASTM D854 |
| Moisture Content | <0.3% | ISO 787/2 |
| LOI (Loss on Ignition) | <1.2% | ISO 2951 |
| Packaging | 25kg/Bag, 1MT/Big Bag | ISO 780 |
All product batches are certified to ISO 9001:2015 and comply with REACH & RoHS guidelines.
3. Manufacturing Process Flow
The production of Hezhe Metakaolin Price Bulk Kaolin Clay Powder Price of kaolin per ton Importers China Clay 325 Calcined Kaolin Powder for Coating adopts a state-of-the-art transformation process from high-purity kaolin through precision calcination. This ensures enhanced pozzolanic effect, brightness, and surface activity.
- Natural Kaolin Ore (High-purity sourced; <0.8% Fe₂O₃ content for improved whiteness)
- Crushing: Particle size reduced for subsequent pulping & purification
- Pulping & Degritting: Suspension and removal of heavy minerals & grit
- High-Temperature Calcination (700–900°C): Kaolinite transforms to Metakaolin, optimizing pozzolanic reactivity
- Rapid Cooling: Locks in optimal structure while preventing rehydration
- Air Grinding & Classification: Delivers ultra-fine (D50 ≤2μm), high-reactivity powder with uniform distribution
- Automated Packaging: Dustproof, moisture-resistant, eco-friendly packs with QR batch tracing
- Material: Pure Kaolin Clay → Calcined to Metakaolin (anhydrous aluminium silicate)
- Manufacturing: Combination of mechanical processing, thermal transformation, CNC-controlled sieving
- Standards: Consistently meets or exceeds ISO 1248-2016, ANSI/ASTM C618 pozzolanic standards
- Product Lifetime: >30 years in composite or concrete structures
- Industries: Coating, Petrochemical, Metallurgy, Concrete, Paper, Water Supply, Environmental applications
4. Technical Advantages & Data Visualization
- Exceptional Particle Fineness: D50 ≤2μm ensures ultra-smooth coatings and optimized polymer composite interfaces
- High Brightness: ISO brightness ≥92%—ideal for white and bright-colored coatings/papers
- High Reactivity: Metakaolin structure enhances pozzolanic and binding properties (ASTM C618)
- Corrosion & UV Resistance: Reinforces longevity in harsh chemical, marine, outdoor settings
- Eco-Friendly: Supports low-carbon construction by reducing cement usage & CO2 output
- Cost Efficiency: Lower cost per ton versus synthetic fillers or titanium dioxide alternatives
5. Supplier Comparison Table
| Brand/Supplier | Origin | Brightness | Particle Size (D50, μm) | Al2O3 | Price/ton (USD) | Certifications |
|---|---|---|---|---|---|---|
| Hezhe Metakaolin | China | ≥92% | ≤2.0 | ≥43% | 168–196 | ISO, REACH, RoHS, SGS |
| Imerys “MetaStar” | France | 90-92% | ≤3.2 | 41–43% | 210–245 | ISO, EN 197 |
| BASF “MetaPro” | Germany | 88–91% | 2–4 | 39–41% | 225–252 | ISO, ASTM, SGS |
| Local Indian | India | 85–90% | 3–7 | 37–41% | 139–180 | ISO |
- Hezhe Metakaolin offers the best cost-to-performance ratio in the global market, balancing premium purity, brightness, fine particle distribution, and competitive price, particularly for coating and high-value-added applications.
- Third-party SGS and ISO random batch testing reports available upon request for all exported lots.
6. Customization & Turnkey Solutions
Hezhe provides made-to-order metakaolin grades to suit advanced composite, specialty coating, refractory, and green concrete applications. Customization includes:
- Particle size tailoring (D50 from 1.5–5μm): Ensuring targeted dispersion and additive performance.
- Surface modification: Optional silane/organosilane surface treatment for enhanced hydrophobic or crosslinking properties.
- Color tuning: Selection for ultra-high brightness or specific tint requirement.
- Packaging: Food-grade, anti-caking, big bags, or custom logo.
- Lab support: Free sample evaluation and technical consult (ISO/EN/ASTM-compliant).
7. Application Scenarios & End-User Case Studies
Hezhe Metakaolin Price Bulk Kaolin Clay Powder Price of kaolin per ton Importers China Clay 325 Calcined Kaolin Powder for Coating is prized for its multi-sector versatility, with recognized technical and economic benefits:
- Premium Coatings: Matting, rheology enhancement, opacity, and scrub resistance in water-based and solvent-based systems.
- High-Performance Concrete: Replaces 8–15% cement to increase compressive/tensile strength, workability, and chloride resistance (Reference: Cement and Concrete Research, Vol 42)
- Ceramics & Refractories: Firing additive, increases whiteness and dimensional stability.
- Paper/Pulp Industry: Improves fiber binding, surface smoothness, and ink absorbency.
- Water Supply Infrastructure: Lining of pipes and tanks to ensure anti-corrosion, potable water compliance.
- Petrochemical & Metallurgy: Acid-alkali resistant mortars, filter press aids, and casting molds.
- Water Pipeline Rehabilitation: CIPP (Cured In Place Pipe) coatings with metakaolin for improved pipeline lifecycle
- Green Concrete (LEED Projects): Certified metakaolin for sustainable architecture (reference: LEED MRc4)
8. Frequently Asked Questions (Technical FAQ)
Q1: What is the primary material composition of Hezhe Metakaolin Price Bulk Kaolin Clay Powder Price of kaolin per ton Importers China Clay 325 Calcined Kaolin Powder for Coating?
A: Pure metakaolin derived from high-quality natural kaolin clay (mainly Al₂Si₂O₇), calcined and milled to ultra-fine powder (325 mesh).
Q2: What are the available particle size distributions (PSD), and why is D50 important?
A: Standard D50 is ≤2μm, with custom batches 1.5–5μm. Finer D50 delivers superior dispersibility, surface area, and reactivity crucial for coatings and concrete pozzolanic effect.
Q3: Which international standards does this product meet?
A: Fully compliant with ISO 1248, ISO 9001:2015, ASTM C618, EN 197, REACH, RoHS. Export batches pass SGS & third-party labs.
Q4: What are typical packaging options and their safety?
A: 25kg kraft bags (PE inner), 1MT bulk big bags. All bags are dustproof, moisture-resistant, and marked for traceability. Food-grade/antistatic bags available.
Q5: Does metakaolin improve anti-corrosion or chemical resistance in coatings/concrete?
A: Yes, the pozzolanic reaction forms C-S-H and C-A-H phases which densify matrix, reducing permeability and corrosion risk by up to 35% (tested per ASTM C1202).
Q6: What is the shelf life and recommended storage condition?
A: Unopened, kept dry and away from humidity, shelf life is 24 months. Opened bags should be sealed after each use to avoid moisture uptake.
Q7: What laboratory certificates can be provided?
A: SGS, Intertek, or customer-specified third party results for chemical composition, particle sizing, whiteness, heavy metals, pozzolanic index (PI).
9. Delivery Cycle, Quality Guarantee & Client Support
- Lead time: 7–14 days ex-works for FCL bulks; 15–22 days for OEM/large custom orders.
- Global logistics: CIF, FOB, DAP (multi-port), fast container111 booking.
- Warranty: All delivered metakaolin guaranteed to comply with agreed spec/grade & certified, full refund or replacement for any non-conforming lots.
- Technical support: Online/video consulting, on-site deployment, and regular post-sales follow up.
- Certificates: COA, MSDS, ISO, SGS, RoHS. On-request batch sample retainment for 2 years for post-delivery validation.
