Rotary Calcined Bauxite 85% Al₂O₃

Rotary Calcined Bauxite 85% Al₂O₃

High-density, thermally stable calcined bauxite for refractory, abrasive, and ceramic applications.

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★ High Alumina (85% Min)

★ Refractoriness 1770℃+

★ Low Iron (Fe₂O₃ ≤2.0%)

★ Bulk Density ≥3.10 g/cm³

ISO 9001:2015 Certified · Exported to 40+ Countries

           Download Technical Data Sheet

What Is Rotary Calcined Bauxite?

▸ 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.

Production Process

▸ From bauxite ore to finished sand, every stage is controlled to ensure consistent quality:

Why SEPPE Rotary Kiln Calcination Matters

▸ 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.

Quality Control & Laboratory Testing

▸ XRF Chemical Analysis — every batch tested for Al₂O₃, Fe₂O₃, TiO₂, CaO, MgO, K₂O, Na₂O 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.

Key Benefits

▸ 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.

Typical Applications

Chemical Composition & Physical Properties

Available Grades

Why Choose SEPPE Calcined Bauxite?

▸ 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.

Packaging & Delivery

▸ 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

FAQ

❓ What is rotary calcined bauxite used for?

▸ It is primarily used in refractory bricks, castables, and monolithics for steel ladles, blast furnaces, rotary kilns, and other high-temperature industrial equipment.

❓ Is rotary kiln calcined bauxite better than shaft kiln material?

▸ 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.

❓ Can you customize the Al₂O₃ content?

▸ 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.

❓ What particle sizes are available?

▸ Standard sizes: 0-1mm, 1-3mm, 3-5mm, 5-8mm, 25-50mm. Custom sizing can be arranged upon request.

❓ Can you supply long-term bulk orders?

▸ Absolutely. With integrated mining and processing, we maintain stable inventory levels and can support annual supply contracts with consistent quality and on-time delivery.

❓ Do you provide samples and technical documents?

▸ Yes. We offer free samples for lab evaluation, along with TDS (Technical Data Sheet), SDS (Safety Data Sheet), and SGS test reports upon request.