Product Description

HUAO Tabular Alumina represents an exceptionally pure form of sintered corundum, engineered without sintering additives such as MgO or B₂O₃. Through an advanced process of fine powder milling, precision roll compaction, and thermal densification at ultra-high temperatures, the material achieves complete recrystallization into large, coarse α-Al₂O₃ tabular crystals. Delivering an Al₂O₃ purity of over 99.2%, this white synthetic aggregate offers superior volumetric stability, structural integrity, and resistance against severe chemical slag attack. It serves as a foundational refractory raw material for global steelmakers, refractory producers, and technical ceramic manufacturers requiring low porosity and ultra-high refractoriness.

Technical Parameters

Key Features

• Formulated without sintering aids (MgO, B₂O₃), eliminating low-melting glass phases and maintaining exceptional creep resistance under intense thermal loads.
• Ultra-high temperature firing develops large interlocking crystal grains, imparting superior thermal shock resistance and high mechanical toughness.
• With a bulk density reaching ≥ 3.5 g/cm³ and porosity kept below 5.0%, the material prevents molten metal or corrosive slag from penetrating the refractory body.
• Controlled levels of silica (SiO₂ ≤ 0.09%) and iron oxide (Fe₂O₃ ≤ 0.02%) maintain hot strength and structural longevity during high-temperature operations.
• Guaranteed low moisture (≤ 1.5%) ensures stable rheology and predictable setting behavior when incorporated into water-sensitive binder formulations.

Applications

• Primary aggregate component for steel ladles, tundish linings, tap holes, and iron runner castables exposed to continuous molten steel contact and aggressive chemical erosion.
• Ideal for manufacturing high-precision continuous casting components, including slide gate plates, shroud nozzles, purging plugs, and breathable bricks.
• Used in high-alumina kiln saggers, firing supports, and wear-resistant industrial ceramic tiles where high structural load-bearing capacity is required.

Why Choose HUAO

Our heat treatment ensures complete recrystallization, eliminates internal micropores, and provides consistent grain strength across all batches. The shape of engineering particles enhances the mechanical correlation in the matrix of low cement and ultra-low cement castables, and improves the thermal fracture modulus. HUAO provides direct factory bulk supply, strict export quality control, and sea freight logistics.

Customization

HUAO produces Tabular Alumina in a full spectrum of coarse, medium, and fine fraction sizes (including standard mesh sizes, lump aggregates, and fine powders) to fit exact client formulation curves. Standard export packaging includes 25kg multi-wall paper bags and 1000kg/1250kg bulk jumbo bags equipped with polyethylene moisture liners, fully palletized for sea freight.

FAQ

We also provide other alumina products. If you would like to learn more about Calcined Alumina, please click here.