HA180 Reactive Alumina Micro-Powder with D50 = 1.8 μm Singlet Particle Distribution and Low Chemical Impurities for Refractories

HUAO HA180 Reactive Alumina Micro-Powder is a high-purity alpha-alumina (α-Al₂O₃) engineered specifically for high-performance refractory castables and specialized thermal applications. Featuring a singlet particle size distribution with a median particle size of D50 = 1.8 μm and a BET surface area of 2.1 m²/g, HA180 is formulated to maintain low chemical impurities (Na₂O ≤ 0.20%, Fe₂O₃ ≤ 0.05%, SiO₂ ≤ 0.08%). By optimizing particle packing density and reducing mixing water requirements, HA180 enhances matrix fluidity and rheology while accelerating solid-state sintering to deliver exceptional mechanical strength, superior thermal shock resistance, and dependable protection against molten slag erosion.

Note: Custom grain sizes can be prepared according to specific customer process requirements.

• Controlled Singlet Distribution: Designed with a uniform singlet grain distribution centered at D50 = 1.8 μm, HA180 effectively fills voids between larger refractory aggregates to lower water addition and promote high green density.
• Balanced Sintering Activity: With a BET surface area of 2.1 m²/g (range 1.5-3.0 m²/g), HA180 offers a balanced thermal reaction profile, accelerating solid-state sintering while maintaining extended workability and rheological control during mixing.
• Strict Impurity Control: Low soda (Na₂O ≤ 0.20%), silica (SiO₂ ≤ 0.08%), and iron oxide (Fe₂O₃ ≤ 0.05%) prevent excessive glassy phase formation at high temperatures, preserving structural integrity under severe thermal loads.
• Superior Slag & Thermal Endurance: Enhances post-firing bulk density, cold crushing strength, and resistance to chemical erosion caused by molten steel and acidic/basic slag.

• Steel Ladle Linings & Tundishes: Enhances matrix density and structural stability against molten slag attack.
• Blast Furnace Iron Runners: Delivers thermal shock endurance and erosion resistance under high-velocity metal flows.
• Functional Continuous Casting Shapes: Extensively applied in porous purging plugs, seating blocks, and shrouds requiring dense microstructures.
• Corundum Self-Flowing Castables & Spray Coatings: Provides slurry viscosity control, smooth flowability, and rapid strength development.

• Certified Quality Management: ZIBO HUAO NEW MATERIALS CO., LTD. operates in full compliance with ISO 9001 (Quality Management), ISO 14001 (Environmental Management), and ISO 45001 (Occupational Health & Safety) certified standards.
• Dedicated Export Quality Control: Leveraging over 10 years of B2B export expertise, HUAO serves as the eyes of our clients, conducting lot-wise chemical and particle size (Cilas) inspections to ensure batch-to-batch consistency.
• Factory Direct Supply: Integrated manufacturing capabilities provide reliable bulk capacity, direct cost efficiency, and full technical support.

HUAO HA180 is packaged in standard 25 kg moisture-proof paper bags or heavy-duty 1000 kg / 1250 kg bulk jumbo bags (Ton Bags) with internal polyethylene liners. Grain size distributions and private-label packaging options can be tailored to client specifications.

We also offer a complete line of high-purity alumina products. If you would like to explore our Tabular Alumina or Calcined Alumina series, please contact our technical sales team.