Tabular Alumina

A dense refractory material, Almatis tabular alumina is a well-sintered, crystalline alpha alumina used as both a refractory aggregate and as fines addition to the matrix.

Tabular Alumina Applications

Tabular Alumina is the material of choice in unshaped and shaped high performance refractories used in a variety of industries (steel, foundry, cement, glass, petrochemical, ceramic and waste incineration). Other common non-refractory applications include its use in kiln furniture and for metal filtration.

Benefits of Almatis Tabular Alumina

  • High refractoriness
  • Excellent thermomechanical properties
  • High volume stability
  • High density, low permeability
  • High thermal shock resistance
  • High chemical resistance
  • High purity
  • High mechanical stability
  • High wear-resistance

Why Almatis Tabular Alumina is Premium

  • Very homogenous, pure and dense alumina for producing high quality refractories
  • Wide range of sized product to optimize refractory formulations
  • Secure supply with manufacturing locations in Asia, Europe and Americas
  • Global product specifications deliver the same product around the globe
  • Unmatched global technical support offering consulting, troubleshooting and application assessment, to optimize refractory performance
  • Short lead times available in all world regions

Almatis Tabular Alumina

Almatis' broad T60/T64 tabular alumina product line offers a wide range of coarse and fine sized products, providing the global refractory industry the capability to blend these sizes and create a unique particle size distribution for optimizing their refractory performance.

SeriesT60/ T64 Sizes, mm (mesh)Benefit
Coarses 0-0.5mm (-28),
0-1mm (-14),
0-3mm (-6),
0.2-0.6mm (28-48),
1-2mm (8-14),
1-3mm (6-14),
2-5mm (1/4-8),
3-6mm (3-6)
Adds thermal shock and corrosion resistance to refractory products
Fines -20MY FINE,
-45MY (-325) LI,
-45MY (-325) STD,
0-0.2mm (-65),
0-0.3mm (-48)
Optimizes the particle size distribution and refractoriness of the refractory matrix

SLA-92 / Bonite / Bonite LD

Almatis offers two unique specialty aggregate products for specialized refractory applications: Super Lightweight Aggregate (SLA-92), Bonite and Bonite LD


A super lightweight aggregate, SLA-92 is a non-fibrous, high-purity insulating aggregate with microporosity based on calcium hexaluminate. This unique combination gives the material a low thermal conductivity and offers an excellent resistance to thermal shock and provides a high refractoriness.

Super Lightweight Aggregate SLA-92 Applications

Almatis super lightweight specialty aggregate SLA-92 is a high-temperature insulation raw material for:

  • Iron and steel industry
  • Aluminum industry
  • Industrial furnace industry
  • Chemical industry
  • Ceramic industry
  • Petrochemicals industry

Benefits of Almatis Super Lightweight Aggregate SLA-92

  • Low, almost constant thermal conductivity, even with rising temperatures
  • High open porosity
  • Very good thermal stability
  • Excellent thermal shock resistance
  • High refractoriness
  • High purity
  • Very good insulation, even at high temperatures

Why Almatis Super Lightweight Aggregate SLA-92 is Premium

  • Unique alumina-based chemistry with very high porosity, providing excellent insulating properties
  • High purity aggregate for challenging refractory applications
  • Non-fibrous, and available in a range of aggregate sizes
  • Globally available

Technical Papers

Developments in the Refractory Design of Lids for Ladle Preheating in Dunkirk Steelworks
Experiences with Mircoporous Calcium Hexaluminate Insulating Materials in Steel Reheating Furnaces at Hoesch Hohenlimburg and Thyssen Krupp Stahl AG, Bochum
Industrial Application Experiences with Microporous Calcium Hexaluminate Insulating Material SLA-92
Innovative ceramic fiber free steel ladle preheaters at Corus Steelworks IJmuiden
Long Term Temperature Stability of Microporous Calcium Hexaluminate-based Insulation Materials
New Insulating Raw Material for High Temperature Applications
New Microporous Materials for Use in Modern Firing Plants
Non-fibrous insulations of Submerged Nozzles for Continuous Casting

Bonite / Bonite LD

Bonite and Bonite LD are synthetic high refractory sintered aggregates. Their major mineral phase is calcium hexaluminate, CA6. The Almatis high temperature sintering process pre-reacts Bonite to provide a stable aggregate volume with no new phases forming during refractory heat-up.

Successful industrial scale applications in the aluminum, cement, steel and petrochemical industry prove the potential of calcium hexaluminate based refractories.

The dense CA6-aggregate Bonite is the material of choice in applications where corrosion resistance is the major focus. Bonite LD, with higher porosity levels, offers increased insulation properties and maintains the corrosion resistance inherent to CA6.

The unique combination of properties makes Bonite based refractory materials the ideal choice when energy reduction is desired while providing high safety level in an application.

Bonite / Bonite LD Applications

This unique specialty refractory aggregate is valued for:

  • Low wettability in aluminum smelting
  • High chemical resistance to a cement kiln's alkaline environment
  • High refractoriness and low solubility in iron containing slag, for steelmaking
  • Stability in the reducing atmospheres of the petrochemical industry

Benefits of Almatis Bonite / Bonite LD

  • High refractoriness (melting point of 1830°C [3326°F])
  • Low thermal conductivity
  • Low solubility in iron containing slag
  • High stability in reducing atmospheres e.g. CO
  • High chemical resistance in alkaline environment
  • Low wettability by molten metals and slag (ferrous and non-ferrous)
  • Thermal expansion coefficient similar to corundum
  • Low thermal conductivity when compared to other products with similar densities

Why Almatis Bonite / Bonite LD  is Premium

  • Unique calcium hexaluminate-based chemistry has high volume stability for extended refractory life
  • New combination of important material properties, e.g. potential for combination of wear & insulating lining
  • Available in seven different sizes, to meet the needs of any refractory challenge
  • Globally available