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Dense Shaped Refractory Products

Dense Shaped Refractory Products

Refractory bricks have specific shapes and are in majority fired at high temperatures to form a ceramic bond. The raw material mixture, type of compaction and the heat treatment determine the final properties of dense shaped refractory materials.

More than 50% of all shaped refractory products can be allocated in a chemical / mineralogical sense to the binary system SiO2 - Al2O3. In general, with increasing Al2O3 content also the refractoriness and maximum application temperature of the brick increases. But, depending on the raw materials used, accompanying substances (impurities) such as Fe2O3, TiO2, alkalies, earth alkalies can have a significant influence on the final properties by the formation of low melting phases.

Synthetic high alumina materials provide stable chemical compositions with low amount of impurities and allow the formulation of high performing refractory bricks with reliable properties.

Tabular & other Aggregates

Spinel AR 78

Alumina-rich spinel (78% Al2O3)
Used for steel ladle shapes and monolithics

Spinel MR 66

Magnesia-rich spinel; contains free periclase
Used in bricks for cement rotary kilns

Bonite/Bonite LD

Sintered calcium hexa-aluminate CA
High chemical resistance at reduced thermal conductivity

Calcined Aluminas


for refractory matrix enhancement
Particle size / D50 = 5.0µm
Na2O Content = 0.15%

A 2 -325

Alpha-alumina for refractory matrix enhancement
Particle size / D50 = 5.5µm
Na2O Content = 0.30%

CT 800 FG

Alpha-alumina for refractory matrix enhancement
Particle size / D50 = 3.5µm
Na2O Content = 0.12%

CT 10 SG

Special alumina for gunning applications
Particle size / D50 = 3.0µm
Na2O Content = 0.4%

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