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Reactive Aluminas

Reactive Aluminas

Reactive aluminas are specially designed for the production of high performance refractories where defined particle packing, rheology and consistent placement characteristics are as important as the superior physical properties of the final product. Reactive aluminas are fully ground down to the primary (single) crystals by highly efficient grinding processes. The average particle size, D50, of mono-modal reactive aluminas, is therefore nearly equal to the diameter of their single crystals. The combination of reactive aluminas with other matrix components, such as tabular alumina 20μm or spinel 20μm, allows the control of the particle size distribution to achieve the desired placement rheology.

Almatis has the broadest reactive alumina product portfolio available around the globe, with products from sub-micron to 3 micron particle size. Particle size distributions, ranging from mono-modal to bi-modal and multi-modal, allow full flexibility in formulation design and provide the convenience of co-milled engineered reactive aluminas.

RG 4000

Mono-modal alpha-alumina
Particle size / D50 = 0.6µm
Na2O Content = 0.08%

CTC 20

Mono-modal alpha-alumina
Particle size / D50 = 1.8µm
Na2O Content = 0.12%

A 20 SG

Mono-modal alpha-alumina
Particle size / D50 = 3.3µm
Na2O Content = 0.23%

A 3000 FL

Bi-modal alpha-alumina
Particle size / D50 = 2.5µm
Na2O Content = 0.10%

CL 370

Bi-modal alpha-alumina
Particle size / D50 = 2.5µm
Na2O Content = 0.10%

CTC 40

Bi-modal alpha-alumina
Particle size / D50 = 1.4µm
Na2O Content = 0.08%

E-SY 1000

Multi-modal alpha-alumina; low dilatancy
Particle size / D50 = 1.7µm
Na2O Content = 0.20%

CTC 30

Multi-modal alpha-alumina
Particle size / D50 = 1.5µm
Na2O Content = 0.08%

CTC 50

Multi-modal alpha-alumina
Particle size / D50 = 1.5µm
Na2O Content = 0.16%

CTC 55

Multi-modal alpha-alumina; spinel containing
Particle size / D50 = 1.6µm
Na2O Content = 0.10%

E-SY 2000 with Spinel

Multi-modal alpha-alumina; low dilatancy;
Particle size / D50 = 1.4µm
Na2O Content = 0.10%

CTC 22
Bi-modal alpha-alumina
Particle size / D50 = 1.9µm
Na2O Content = 0.12%
T60/T64 20 micron

Ground Median Size = 2.7µm
Ground Surface Area = 2.5 m²/g
Na2O Content = 0.30%

A 1000 SG

Ground Median Size = 0.6µm
Ground Surface Area = 8.2 m²/g
Na2O Content = 0.07%

A 152 SG

Ground Median Size = 1.2µm
Ground Surface Area = 4.3 m²/g
Na2O Content = 0.06%

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