Reactive Alumina HA100 Powder
Product Description
HUAO reactive alumina micro-powder HA100 is mainly used in the production of key high-performance refractory products such as ladle castables, iron ditch castables, breathable bricks, block bricks, corundum self-flowing castables, and spray coatings.
Technical Parameters
| Features/Methods |
Unit |
HA100 Typical |
HA100 Min |
HA100 Max |
| Na₂O |
% |
0.10 |
-- |
0.20 |
| Fe₂O₃ |
% |
0.08 |
-- |
0.12 |
| MgO |
% |
8.00 |
-- |
-- |
| SiO₂ |
% |
0.05 |
-- |
0.10 |
| CaO |
% |
0.10 |
-- |
-- |
| Surface area/BET |
m²/g |
3.8 |
3.5 |
4.7 |
| D50 Cilas |
μm |
1.6 |
1.3 |
1.8 |
| D90 Cilas |
μm |
7.5 |
6.0 |
8.5 |
| Particle distribution |
-- |
multimodal |
-- |
-- |
Key Features
Engineering multimodal distribution: The multimodal grain distribution optimizes the filling of micropores in the refractory matrix, reduces the overall porosity, and can form a compact sintered structure.
Specialized MgO formula: A typical MgO content of 8.00% supports active matrix interactions, helping to improve the structural strength of the castable formula.
High pour flowability and low expansion: Optimized particle size and controlled surface area (BET 3.5-4.7 m²/g) provide excellent flow characteristics while maintaining low linear expansion during heating.
High and medium temperature strength: The controllable sintering activity promotes a reliable solid-state reaction pathway, improving the cold compression strength and hot fracture modulus in the medium temperature range.
Strict particle size control: Cilas laser diffraction verification ensures reliable D50 of 1.3-1.8 μm (typical 1.6 μm) and D90 of ≤ 8.5 μm, avoiding the generation of oversized aggregates in the mixing equipment.
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Applications
Reactive alumina can serve as an essential active binder in ladle castables and iron runner linings, helping to prevent slag erosion of equipment and extend the service life of refractory materials. It can also be used for producing breathable bricks and seat bricks that require high density and precise dimensional stability. It can also be used for corundum self flowing castables and refractory spray coatings, achieving smooth pouring, minimal water demand, and high bonding durability.
Why Choose HUAO
Manufactured under strict ISO 9001, ISO 14001, and ISO 45001 standards, HUAO conducts complete chemical and physical testing on every lot to ensure consistent quality. The engineered particle packing of HA100 allows refractory manufacturers to achieve desirable rheological behavior with reduced mixing water, lowering drying times and thermal cracking risks. As a direct producer and exporter, HUAO offers steady volume supply, competitive factory-direct pricing, and dependable ocean freight support for global industrial clients.
Customization
HUAO offers customized packaging to guard fine reactive powders against ambient moisture during international shipment. Packaging choices include standard 50kg multi-layer bags, 1000kg/1250kg bulk jumbo bags with inner polyethylene liners. Shrink-wrapped palletized loads designed for sea transport can be offered.
FAQ
Q1: What is the purpose of the 8.00% MgO content in HA100?
A1: The controlled MgO addition promotes matrix reactivity and in-situ spinel/bonding phase formation, which helps improve medium-temperature strength and thermal stability in specialized castable formulations.
Q2: How does the multimodal particle size distribution benefit refractory castables?
A2: Multimodal sizing fills microscopic interstitial spaces between larger aggregates, lowering water requirements, improving slurry flow, and yielding a denser final structure.
Q3: What are the standard particle size parameters for HA100?
A3: HA100 features a typical Cilas D50 particle size of 1.6 μm (range 1.3-1.8 μm) and a D90 of 7.5 μm (range 6.0-8.5 μm).
We also provide other alumina products. If you would like to learn more about Tabular Alumina, please click here.
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