High-Purity Smelter & Chemical Grade Calcined Alumina (Al₂O₃) — Certified Vietnamese Origin
Premium-grade calcined alumina engineered for primary aluminum smelting, technical ceramics, refractories, and chemical manufacturing. Sourced directly from Vietnam’s high-grade natural bauxite reserves, delivering guaranteed low impurity levels (Fe₂O₃ ≤ 0.02%, SiO₂ ≤ 0.02%), optimal thermal stability, and maximum tariff savings via preferential Certificates of Origin (Form E, EUR.1, CPTPP, AK/AJ).
Technical Specifications & Chemical Composition Data
Efreso Alumina is produced via the Bayer process followed by controlled fluid-bed calcination, ensuring strict chemical purity, uniform particle distribution, and consistent physical flowability.
A. Guaranteed Chemical Composition
| Chemical Parameter | Standard Specification (%) | Typical Batch Result (%) | Testing Method / Equipment |
|---|---|---|---|
| Aluminum Oxide (Al₂O₃) | ≥ 98.50% min | 98.65% | XRF / Difference Method |
| Silicon Dioxide (SiO₂) | Controlled strictly below 0.030% max | 0.018% | Spectrophotometry / XRF |
| Iron Oxide (Fe₂O₃) | Controlled strictly below 0.025% max | 0.015% | Atomic Absorption (AAS) |
| Sodium Oxide (Na₂O Total) | Controlled strictly below 0.45% max | 0.38% | Flame Photometry |
| Titanium Dioxide (TiO₂) | Controlled strictly below 0.008% max | 0.004% | X-Ray Fluorescence (XRF) |
| Loss on Ignition (LOI, 300°C – 1000°C) | Controlled strictly below 1.00% max | 0.65% | Gravimetric Analysis |
| Alpha Alumina (α-Al₂O₃) Content | 30% – 60% (Customizable) | 45% | X-Ray Diffraction (XRD) |
B. Physical Properties & Particle Size Distribution
| Physical Parameter | Value Range / Standard Specification | Standard Test Protocol |
|---|---|---|
| Coarse Particles (+100 mesh / > 150 µm) | Controlled strictly below 10.0% | ISO 2926 / Laser Diffraction |
| Fines (-325 mesh / < 45 µm) | Controlled strictly below 12.0% | ISO 2926 / Laser Diffraction |
| Specific Surface Area (BET) | 60.0 – 80.0 m²/g | N₂ Adsorption (BET Method) |
| Bulk Density (Untapped) | 0.90 – 1.05 g/cm³ | ISO 903 |
| Angle of Repose | 30° – 35° (Free-flowing) | Funnel Flow Test |
| Appearance | Dry, clean, odorless white powder | Visual / Optical Inspection |
Commercial Advantages & Value Proposition
1. Ultra-Low Impurity Profile
- Feature: Low iron & silica contamination levels (SiO₂ ≤ 0.02%, Fe₂O₃ ≤ 0.02%).
- Advantage: Prevents sludge buildup in reduction cells and eliminates structural micro-defects.
- Business Benefit: High production yield, lower energy consumption, and extended potline refractory lifespan.
2. Trade Compliance & Duty Exemption
- Feature: Verified 100% Vietnamese bauxite origin with official C/O.
- Advantage: Eligible for Form E, Form EUR.1, CPTPP, Form AK, AJ, and AANZ.
- Business Benefit: Bypasses anti-dumping tariffs and significantly lowers import duty costs.
3. Optimal Flowability & Low Dusting
- Feature: Strict fine dust control (< 45 µm ≤ 12%) and steady bulk density.
- Advantage: Smooth pneumatic conveying with minimal dust generation.
- Business Benefit: Reduces material dusting losses by up to 15% and protects workplace safety.
4. Quality Assurance Protocols
- Feature: Batch XRF spectrometry analysis + Third-party SGS/Intertek inspections.
- Advantage: Complete chemistry verification prior to vessel loading.
- Business Benefit: Guaranteed batch-to-batch consistency and full REACH/RoHS compliance.
Supply Capacity & Global Logistics
Packaging Options
• Jumbo Bags (FIBC): 1,000 kg / 1,250 kg UV-proof PP woven bags with PE liner.
• Bulk Vessel: Direct loading (5,000 – 25,000 MT) for primary smelters.
Supply Capacity
• Up to 30,000 MT / Month.
• Flexible Supply Models: Made-to-Order (MTO) & Stocked Storage for contract orders.
Incoterms Supported
• FOB (Cat Lai / Phu My / Hai Phong Ports, Vietnam)
• CFR / CIF (Worldwide Destination Ports)
• DDP / DAP (Select regions)
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