Reactive Aluminas

Reactive aluminas enhance high performance refractories through improved particle packing, rheology and physical properties.

Reactive Alumina Applications

Reactive Aluminas are a fundamental component of high quality shaped and unshaped (monolithic) refractory products.

The fully ground reactive aluminas are especially beneficial 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.

Mono-modal reactive aluminas provide the full flexibility in designing the refractory matrix particle size distribution. Multi-modal reactive aluminas can further enhance the performance by optimising the particle size distribution and due to the intensive homogenisation of the super-fine components during co-grinding. CTC 50 and CTC 55 have advantages especially for self-flowing castables. E-SY 1000 and E-SY 2000 contribute to a low dilatancy of castables, which makes them easy to use and to handle.

Benefits of Almatis Reactive Aluminas

  • Reduced water demand
  • Low open porosity
  • Excellent sinter reactivity
  • Excellent wear resistance and mechanical strength
  • Excellent high temperature mechanical performance
  • CTC 50 and CTC 55 especially benefit self-flowing castables
  • E-SY 1000 and E-SY 2000 reactive alumina is a key component to achieve soft castable consistency at very low dilatancy
  • Low dilatant mixes allow use of low power mixing equipment and a mix consistency for being shoveled
  • E-SY 1000 and E-SY 2000 support silica-free pumpable mixes with superior hot properties, valued as a high performance ladle lining by shot-creting and other applications

Why Almatis Reactive Aluminas are Premium

  • Broadest reactive aluminas product portfolio available around the globe, sub-micron to 6 micron particle size, mono- and multi-modal
  • Spinel containing reactive aluminas
  • Excellent lot-to-lot consistency for producing highly reliable refractory products
  • All products produced to tight product specifications for optimized refractory formulations:
    • Chemistry
    • Particle size distribution
    • Specific surface area/BET
    • Primary crystal size
  • Contaminant-free ground products ensure high refractoriness
  • E-SY aluminas for easy placement in difficult installation conditions, e.g. numerous anchors
  • E-SY aluminas provides the castable rheology required for double piston pumps.
  • Tabular alumina containing pumpable/shotcreting mixes with E-SY 1000/2000 do not require silica fume
  • Unmatched global technical support offering consulting, troubleshooting and application assessment, to optimize refractory performance

Almatis' broad reactive alumina product line for building your optimal refractory matrix

d50 Sizes (µm)Mono-modalBi-modalMulti-modal
‹1.0 A 1000 SG
CT 3000 SG
RG 4000
   
1.0 - 2.0 A 152 SG
CTC 20
E-SY 1000
E-SY 2000
CTC 40 CTC 30
CTC 50
CTC 55
2.0 - 3.0   CL 370
A 3000 FL
 
3.0 - 4.0 A 20 SG    

Calcined Aluminas

Calcined aluminas are alpha-aluminas for refractory matrix enhancement. Almatis offers a large product range of calcined aluminas, classified by soda content, particle size and degree of calcination.

Calcined Alumina Applications

Calcined aluminas improve the performance of both shaped and monolithic refractory products.

Benefits of Almatis Calcined Aluminas

  • Enhanced refractoriness and performance
  • Improved mechanical strength
  • Abrasion resistance
  • Thermal shock resistance

Why Almatis Calcined Aluminas are Premium

  • Ensured supply with largest global capacity
  • Excellent lot-to-lot consistency for producing highly reliable refractory products
  • All products produced to tight product specifications for optimized refractory formulations:
    • Chemistry
    • Particle size distribution
    • Specific surface area/BET
  • Contaminant-free ground products ensure high refractoriness
  • Globally available through expansive worldwide manufacturing, sales and supply
  • Unmatched global technical support offering consulting, troubleshooting and application assessment, to optimize refractory performance

Almatis calcined alumina products for your unique refractory applications

Soda LevelLow Surface AreaMedium Surface Area
Normal soda, Na2O ‹0.45% A2 - 325 mesh CT 10 SG
Medium soda, Na2O ‹0.25% CT 9 G
CT 9 FG
A35 -325 mesh
A13 -325 mesh
Intermediate soda, Na20 ‹0.15% CT 800 FG
CT 800 SG
 

Almatis calcined aluminas are also available in unground form. Please see Ceramics industry