Sintered Tabular Alumina Aggregates with Superior Thermal Shock Resistance for High-Performance Refractory Castables

HUAO Tabular Alumina is a pure, fully dense, sintered alpha-alumina aggregate manufactured without any chemical additives (such as MgO or B₂O₃). Produced in our ISO 9001, ISO 14001, and ISO 45001 certified manufacturing plant, fine-ground aluminum oxide powder is rolling-formed and subjected to ultra-high temperature sintering to achieve complete crystal shrinkage.

As a premier China tabular alumina manufacturer operating two dedicated production lines with an annual capacity of 50,000 tons, HUAO guarantees product performance exceeding national industrial standards. Featuring a well-developed, thick alpha-alumina (α-Al₂O₃) crystal structure with high purity (Al₂O₃ ≥ 99.2%), our white tabular alumina particles deliver outstanding thermal volume stability, high resistance to molten slag scour, and extreme thermal shock durability.

• Ultra-High Refractoriness & Purity: Pure α-Al₂O₃ crystalline structure with Al₂O₃ ≥ 99.2% and strictly limited impurities (SiO₂ ≤ 0.09%, Fe₂O₃ ≤ 0.02%) ensures exceptional heat and corrosion resistance.
• High Bulk Density & Low Porosity: Bulk density ≥ 3.50 g/cm³ and low apparent porosity ≤ 5.0% enhance mechanical strength and protect furnace linings against chemical erosion.
• Low Water Absorption: Water absorption rate ≤ 1.5% significantly reduces liquid water addition in castable formulations and lowers binder requirements for shaped refractory products.
• Optimized Fluidity & Particle Shape: Regular particle shapes with minimal flake content boost matrix packing density and effectively improve slurry fluidity in monolithic castables.
• Superior Thermal Shock Stability: Exceptional toughness and chemical stability cushion extreme temperature fluctuations, preventing structural spalling and degradation under working thermal changes.

Acts as a core aggregate component in Alumina-Magnesia-Carbon, Magnesia-Carbon, Magnesia-Spinel, and Alumina-Chromium refractory bricks. Widely used in breathable purging brick cores, large sliding gate plates, and ladle shrouds to improve high-temperature volume stability and corrosion resistance.

Serves as an essential rich-alumina constituent in unshaped refractory castables, ramming mixes, and gunning mixes used across steel, casting, and medium-frequency induction furnace linings to lower consumption and extend service life.

Utilized as high-strength, wear-resistant lining media and structural refractory components in petrochemical reformers, ceramic kilns, and severe high-temperature processing units.

• Sintered Structural Integrity: Fully sintered alpha-alumina micro-crystals without additives prevent low-melting phase formation and preserve hot modulus of rupture under load.
• Reduced Operating & Refractory Costs: High scour resistance and low porosity minimize erosion rate from liquid slag, extending maintenance intervals and reducing overall thermal equipment wear.
• In-House Manufacturing Scale: Operating two dedicated high-temperature sintering lines yielding 50,000 tons annually ensures complete batch-to-batch consistency and continuous bulk supply.
• Enhanced Flowability & Workability: Controlled grain morphology reduces liquid binder demand while maintaining high flow rates during castable installation.

As a global wholesale tabular alumina supplier, HUAO prepares custom grain size distributions (coarse aggregates and fine powders) precisely tailored to customer processing parameters. Standard B2B packaging options include 25kg multi-wall bags, 1000kg jumbo bulk sacks, 1250kg BB sacks, or specialized moisture-barrier packaging tailored to customer requirements.

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