0-1mm/1-3mm/3-5mm
SEPPE
High-purity rotary kiln calcined bauxite aggregate, engineered for superior refractory castables, bricks, and monolithics.
▸ Rotary calcined bauxite is produced by sintering high-grade raw bauxite in a rotary kiln at temperatures above 1600°C. This process yields a dense, hard, and chemically stable material with high alumina content and low impurities. It is a critical aggregate for refractory materials, providing the high-temperature strength, thermal shock resistance, and slag resistance needed in castables, bricks, gunning mixes, and other monolithic refractories. Available in precisely graded fractions, it ensures optimal packing density and consistent performance in demanding industrial furnaces and kilns.
▸ 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
▸ The rotary kiln method offers distinct advantages for refractory-grade bauxite:
• Uniform Heat Distribution — every particle receives consistent thermal treatment, eliminating under-burned or over-burned material.
• Higher Bulk Density — the tumbling action promotes densification, resulting in ≥ 3.10 g/cm³ grains that minimize porosity and slag penetration.
• Improved Phase Stability — complete conversion to stable mullite and corundum phases ensures reliability up to 1770°C.
• Lower Variability — batch-to-batch consistency that shaft kilns cannot match, essential for repeatable refractory formulations.
▸ XRF Chemical Analysis — every batch tested for Al₂O₃, Fe₂O₃, TiO₂, CaO, MgO, K₂O, Na₂O content.
▸ Bulk Density & Porosity — ensures dense, low-porosity grains for long service life.
▸ Particle Size Distribution — laser diffraction and sieve analysis for accurate 0-1mm, 1-3mm, 3-5mm fractions.
▸ Magnetic Separation Inspection — removal of iron contamination.
▸ Batch Traceability — full documentation from raw ore to shipment.
▸ Wide Alumina Range — from 75% to 90% Al₂O₃ to match specific refractory performance 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 — minimal iron and alkali content ensures stable performance in severe environments.
▸ Precise Sizing — 0-1mm, 1-3mm, and 3-5mm fractions allow optimal packing density and formulation control.
▸ Refractory castables and gunning mixes
▸ Ladle linings, tundish linings, and furnace linings
▸ High-alumina refractory bricks and shapes
▸ Kiln furniture and ceramic components
| 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 |
| Bulk Density | 2.80 - 3.25 g/cm³ |
| Specific Gravity | ≥ 3.70 g/cm³ |
| Hardness | 7.5 - 9.0 Mohs |
| Refractoriness | ≥ 1770℃ |
| Regular Sizes | 0-1mm, 1-3mm, 3-5mm |
| Grade | Al₂O₃ Content | Main Application |
| Standard Refractory Grade | 75-80% | General purpose castables, backup linings |
| High Alumina Grade | 85% | Ladle linings, kiln linings, investment casting |
| Super Duty Grade | 87-88% | Critical high-temperature zones, specialty ceramics |
▸ SEPPE controls the entire production chain — from high-grade bauxite ore to fully integrated calcination, crushing, screening, and global logistics. Our advanced laboratory monitors every batch for chemical consistency and physical properties, ensuring you receive refractory bauxite that performs reliably in the most demanding environments.
▸ With established supply to over 40 countries and dedicated technical support, SEPPE helps refractory manufacturers achieve longer lining life, reduce downtime, and maintain stable production. Flexible packaging, private labeling, and OEM services are available.
▸ 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 castables, bricks, gunning mixes, and other monolithic products for furnace linings, ladles, and kilns.
▸ Standard sizes include 0-1mm, 1-3mm, and 3-5mm. Custom sizing and blends can be arranged upon request.
▸ 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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