| Quantity: | |
|---|---|
0-1,1-3, 3-5, 5-8mm
SEPPE BAUXITE
25083000
▸ High-density, thermally stable calcined bauxite for refractory, abrasive, and ceramic applications.
★ Al₂O₃ 75-90%
★ Refractoriness 1770℃+
★ Bulk Density 2.80-3.25 g/cm³
★ Hardness 7.5-9.0 Mohs
▸ Rotary calcined bauxite is produced by sintering high-grade raw bauxite in a rotary kiln at temperatures around 1600°C. This process removes moisture and impurities, resulting in 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.
▸ The rotary kiln method offers distinct advantages over traditional shaft kiln calcination:
Uniform Heat Distribution — every particle receives consistent thermal treatment, eliminating under-burned or over-burned material.
Higher Bulk Density — the tumbling action inside the rotary kiln promotes densification, resulting in ≥ 3.10 g/cm³ material suitable for demanding refractory applications.
Improved Phase Stability — complete conversion to stable corundum and mullite phases ensures reliable performance at service temperatures up to 1770°C.
Lower Variability — batch-to-batch consistency that shaft kilns simply cannot match, critical for industrial refractory formulations.
▸ XRF Chemical Analysis — every batch tested for Al₂O₃, Fe₂O₃, TiO₂, CaO, MgO content
▸ Bulk Density Measurement — pycnometer method to verify ≥ 3.10 g/cm³
▸ Particle Size Distribution — laser diffraction and sieve analysis for accurate grading
▸ Magnetic Separation Inspection — removal of iron contamination to meet premium specifications
▸ Batch Traceability — full documentation from raw ore source to shipping container
On-site laboratory at SEPPE processing facility
▸ Stable Chemical Composition — consistent alumina and low impurity levels ensure predictable refractory performance.
▸ 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 Water Absorption — minimizes binder demand and enhances workability in monolithic mixes.
▸ Flexible Sizing — available in standard and custom particle size distributions to suit various industrial processes.
| Chemical Composition | |
| Al₂O₃ | 75 - 90% |
| TiO₂ | 2 - 3% |
| SiO₂ | 6 - 18% |
| Fe₂O₃ | 0.5 - 2.5% |
| P₂O₅ | 0 - 0.3% |
| MgO | 0 - 0.2% |
| CaO | 0 - 0.4% |
| 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% |
| Polished Stone Value | 70 Min |
| Aggregate Abrasion Value | 10 Max |
| 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 rotary 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 primarily used in refractory bricks, castables, and monolithics for steel ladles, blast furnaces, rotary kilns, and other high-temperature industrial equipment.
▸ Yes. Rotary kiln calcination ensures uniform heating, higher density (≥3.10 g/cm³), and more consistent chemistry batch-to-batch. Shaft kiln products often suffer from temperature gradients and uneven calcination, leading to performance variability in refractory applications.
▸ Yes. In addition to our standard 85% grade, we can supply 75%, 80%, 87%, and 88% Al₂O₃ material depending on your application requirements and volume.
▸ 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 with consistent quality and on-time delivery.
▸ Yes. We offer free samples for lab evaluation, along with TDS (Technical Data Sheet), SDS (Safety Data Sheet), and SGS test reports upon request.
▸ Contact SEPPE for: • Free Samples • TDS / SDS Documents • OEM Packaging Options • Bulk Container Pricing
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