| Quantity: | |
|---|---|
3-5mm
SEPPE BAUXITE
25083000
One of the hardest natural minerals after diamond, engineered for superior refractory and abrasive performance.
▸ Calcined bauxite is produced by sintering high-grade raw bauxite at high temperatures around 1600°C. This process removes moisture and impurities, yielding a dense, hard, and chemically stable material with high alumina content. It is widely used as a refractory aggregate, abrasive media, and in ceramic formulations where thermal shock resistance and mechanical strength are critical. Its hardness is second only to diamond among natural minerals, ensuring exceptional wear resistance.
▸ From bauxite ore to finished sand, every stage is controlled to ensure consistent quality:
01 — Raw Material & Supply · Own mines, Al₂O₃ ≥ 65%
02 — Calcination Process · Rotary kiln at 1450–1550°C
03 — Processing & Grading · Crushing, screening & magnetic separation
04 — Testing & Delivery · Full lab testing & global packaging
▸ Our advanced calcination process delivers consistent, high-performance bauxite:
• Uniform Heat Distribution — every particle receives consistent thermal treatment, eliminating under-burned or over-burned material.
• High Bulk Density — dense grain structure reduces porosity and improves wear resistance in finished refractories.
• Improved Phase Stability — complete conversion to stable mullite and corundum phases ensures reliability at temperatures up to 1770°C.
• Lower Variability — batch-to-batch consistency that traditional shaft kilns cannot match, critical for industrial refractory formulations.
▸ XRF Chemical Analysis — every batch tested for Al₂O₃, Fe₂O₃, TiO₂, CaO, MgO, K₂O, Na₂O content to ensure grade compliance.
▸ Bulk Density Measurement — pycnometer method to verify specified density range (2.80-3.25 g/cm³).
▸ Water Absorption & Apparent Porosity — tested to confirm low porosity and dense grain structure.
▸ Particle Size Distribution — laser diffraction and sieve analysis for accurate grading of each fraction.
▸ Magnetic Separation Inspection — removal of iron contamination to meet premium specifications.
▸ Batch Traceability — full documentation from raw ore source to final shipping container.
▸ Wide Alumina Range — available from 75% to 90% Al₂O₃ to match your specific performance and budget requirements.
▸ High Bulk Density — dense grain structure reduces porosity and improves wear resistance in castables and bricks.
▸ Excellent Refractoriness — withstands service temperatures up to 1770°C without deformation.
▸ Low Impurity Levels — low iron and alkali content minimizes reactions in high-temperature environments.
▸ Flexible Sizing — available in a range of calibrated fractions to suit various industrial processes.
| Chemical Composition | |
| Al₂O₃ | 75 - 90% |
| TiO₂ | 2 - 3% |
| SiO₂ | 6 - 18% |
| Fe₂O₃ | 0.5 - 2.5% |
| CaO | 0 - 0.4% |
| MgO | 0 - 0.2% |
| K₂O + Na₂O | 0 - 0.4% |
| Physical Properties | |
| Shape | Angular |
| LOI | 0.1 - 0.5% |
| Specific Gravity | 3.70 g/cm³ |
| Bulk Density | 2.80 - 3.25 g/cm³ |
| Hardness | 7.5 - 9.0 Mohs |
| Moisture Content | 0.1 - 0.3% |
| Refractoriness | ≥ 1770℃ |
| Regular Sizes | 0-1mm, 1-3mm, 3-5mm, 5-8mm, … |
| Grade | Al₂O₃ Content | Main Application |
| Economy Refractory | 75% Min | General purpose castables and backup linings |
| General Refractory | 80% Min | Rotary kiln linings, cement plant refractories |
| Premium Refractory | 85% Min | Steel ladles, blast furnaces, tundish linings |
| Specialty / High-End | 87-88% Min | High-temperature ceramics, specialty kiln furniture |
▸ SEPPE controls the entire production chain — from high-grade bauxite ore selection to fully integrated calcination, crushing, screening, and global logistics. Our advanced laboratory monitors every batch for chemical consistency and physical properties, ensuring you receive material that performs reliably in extreme environments.
▸ With established supply to over 40 countries and dedicated technical support, SEPPE helps refractory, abrasive, and ceramic manufacturers reduce rejection rates and maintain stable production. We also offer flexible packaging and OEM services to match your operational needs.
▸ 50 kg bags, 1 MT, 1.25 MT or 1.35 MT jumbo bags
▸ 20' FCL: approx 25-27 MT
▸ Private labeling and custom packaging available
▸ It is used as a high-temperature aggregate in refractory bricks, castables, ladle linings, kiln linings, abrasive blasting, and precision casting.
▸ We supply grades from 75% up to 90% Al₂O₃, including 80%, 85%, 87%, and 88% to match your specific requirements.
▸ Standard sizes: 0-1mm, 1-3mm, 3-5mm, 5-8mm, 25-50mm. Custom sizing can be arranged upon request.
▸ Absolutely. With integrated mining and processing, we maintain stable inventory levels and can support annual supply contracts.
▸ Yes. Free samples for lab evaluation, along with TDS, SDS, and SGS test reports are available upon request.
▸ Contact SEPPE for: • Free Samples • TDS / SDS Documents • OEM Packaging Options • Bulk Container Pricing
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