| Quantity: | |
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0-3mm,1-3mm,3-5mm,5-8mm
SEPPE BAUXITE
25083000
▸ High-purity, thermally stable bauxite sand for demanding refractory and foundry applications.
★ High Alumina ★ Refractoriness 1770℃+
★ Low Iron ★ Consistent Particle Shape
▸ High refractory calcined bauxite sand is produced by sintering selected raw bauxite in a rotary kiln at over 1600°C, then crushing and screening to precise grain sizes. The resulting sand features high alumina content, low impurities, and exceptional refractoriness. It is widely used as a key aggregate in refractory castables, bricks, foundry molds, and precision casting shells where thermal stability and mechanical strength are essential.
▸ The rotary kiln process delivers the consistent quality required for high-performance refractory sands:
Uniform Grain Density — every grain achieves ≥3.10 g/cm³ bulk density, ensuring high strength and low porosity in finished products.
Complete Phase Conversion — stable mullite and corundum crystals resist thermal shock and deformation at temperatures up to 1770°C.
Low Variability — tight control of chemistry and sizing ensures repeatable performance from batch to batch.
Optimized Grain Shape — angular to sub-angular particles provide excellent mechanical interlock with binders.
▸ 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
▸ Batch Traceability — full documentation from raw ore source to shipping container
On-site laboratory at SEPPE processing facility
▸ Outstanding Refractoriness — maintains integrity up to 1770°C, ideal for severe thermal environments.
▸ High Bulk Density — reduces porosity in castables and molds, improving mechanical strength and wear resistance.
▸ Chemical Stability — low iron and alkali content minimize unwanted reactions with metals or slags.
▸ Excellent Grain Integrity — grains resist fracture under mixing and ramming, preserving original size distribution.
▸ Custom Sizing — available in a range of calibrated fractions to meet specific formulation needs.
▸ Refractory castables, gunning mixes, and ramming mixes
▸ Ladle linings, tundish linings, and furnace linings
▸ Precision investment casting shells
▸ Foundry mold and core aggregates
| Chemical Composition | |
| Al₂O₃ | 75-90% |
| Fe₂O₃ | 0.5-2.5% |
| TiO₂ | 2-3% |
| CaO | 0-0.4% |
| MgO | 0-0.2% |
| Physical Properties | |
| Bulk Density | 2.90-3.25 g/cm³ |
| Water Absorption | ≤ 2.5% |
| Refractoriness | ≥ 1770℃ |
| Common Sizes | 0-3mm, 1-3mm, 3-5mm, 5-8mm,... |
| Grade | Al₂O₃ Content | Main Application |
| Standard Refractory Sand | 80% Min | General purpose castables, backup linings |
| High-Refractory Sand | 85% Min | Ladle linings, tundish, high-temperature kilns |
| Super Duty Sand | 87-88% Min | Critical refractories, aerospace investment casting |
▸ SEPPE integrates mining, rotary kiln calcination, precision screening, and global logistics under one quality system. Every shipment of bauxite sand is backed by XRF analysis, particle size distribution testing, and density verification to ensure you get exactly what you specified.
▸ With customers in over 40 countries and dedicated technical support, SEPPE helps refractory manufacturers and foundries achieve consistent product quality, reduce defects, and optimize production costs. 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, linings, foundry molds, and investment casting shells.
▸ Standard sizes include 0-3mm, 1-3mm, 3-5mm, and 5-8mm. Custom sizing can be arranged.
▸ Its high density and refractoriness reduce porosity and shrinkage, resulting in longer lining life and better thermal insulation.
▸ Contact SEPPE for: • Free Samples • TDS / SDS Documents • OEM Packaging Options • Bulk Container Pricing
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