Rotary Kiln Calcined Bauxite 86% Al₂O₃

▸ Premium 86% alumina rotary kiln calcined bauxite, engineered for high-performance refractory bricks and shapes.

★ Al₂O₃ ≥86%     ★ Refractoriness 1770℃+

★ Low Impurities     ★ Sizes: 0-1mm, 1-3mm, 3-5mm, 5-8mm

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What Is Rotary Kiln Calcined Bauxite 86% Al₂O₃?

▸ Rotary kiln calcined bauxite with 86% alumina 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 excellent refractoriness and low impurity levels. It is a key raw material for the production of high-duty refractory bricks, such as those used in steel ladles, blast furnaces, and cement kilns, where high temperature resistance, slag corrosion resistance, and mechanical strength are critical.

Production Process

Why Rotary Kiln Calcination Matters for Refractory Bricks

▸ The rotary kiln process provides the consistent quality essential for high-performance refractory brick manufacturing:

• Uniform Alumina Content — guarantees ≥86% Al₂O₃ in every batch, ensuring consistent brick density and refractoriness.

• High Bulk Density — the tumbling action in the rotary kiln produces dense grains (≥3.15 g/cm³), reducing brick porosity and increasing strength.

• Improved Phase Stability — full conversion to mullite and corundum phases ensures long service life under thermal cycling.

• Batch-to-Batch Consistency — strict process control delivers repeatable sizing and chemistry, critical for brick press operations.

Quality Control & Laboratory Testing

▸ XRF Chemical Analysis — every batch tested for Al₂O₃ (≥86%), Fe₂O₃, TiO₂, CaO, MgO

▸ Bulk Density & Porosity — ensures grain density ≥3.15 g/cm³ for dense brick bodies

▸ Particle Size Distribution — laser diffraction and sieve analysis for 0-1mm, 1-3mm, 3-5mm, 5-8mm

▸ Magnetic Separation Inspection — removes iron contamination to maintain brick quality

▸ Batch Traceability — full documentation from raw ore to shipment

     On-site laboratory at SEPPE processing facility

Key Benefits for Refractory Brick Production

▸ Guaranteed 86% Al₂O₃ — provides the high refractoriness needed for severe service environments.

▸ High Bulk Density (≥3.15 g/cm³) — results in dense, strong bricks with low porosity and excellent slag resistance.

▸ Low Iron & Alkali — minimizes fluxing and ensures structural integrity at high temperatures.

▸ Consistent Particle Sizing — 0-1mm, 1-3mm, 3-5mm, and 5-8mm fractions allow precise formulation for pressing and firing.

▸ Batch-to-Batch Uniformity — ensures consistent brick dimensions and properties, reducing waste and rework.

Typical Applications in Refractory Bricks

▸ High-alumina refractory bricks for steel ladle linings

▸ Blast furnace and hot blast stove bricks

▸ Cement rotary kiln lining bricks

▸ Glass furnace checker bricks and regenerator bricks

▸ Incinerator and boiler refractory bricks

Chemical Composition & Physical Properties

Available Grades for Refractory Brick

Why Choose SEPPE for Refractory Brick Raw Materials?

▸ SEPPE controls the entire production chain — from high-grade bauxite ore selection to fully integrated rotary calcination, crushing, precision screening, and global logistics. Our 86% alumina bauxite is specifically processed to meet the demanding specifications of refractory brick manufacturers, with tight control over chemistry, density, and particle size distribution.

▸ With established supply to over 40 countries and dedicated technical support, SEPPE helps refractory brick producers achieve consistent product quality, reduce waste, and maintain stable production. Flexible packaging, private labeling, and OEM services are available.

Packaging & Delivery