Almatis Logo

Almatis :: Unshaped Refractory Materials (Monolithics)
Homepage / Products & Applications / Refractories /  

Unshaped Refractory Materials (Monolithics)

Unshaped Refractory Materials (Monolithics)

Unshaped refractory materials are defined as “…mixtures consisting of aggregates, additives and binders, prepared for direct use in state of delivery or after adding suited liquids”. In contrast to refractory bricks they are without specific shape and are in majority placed in larger sections behind molds and templates forming a monolithic lining. Gunning installations without requirement for a mold are increasing due to ease of application and higher installation speed.

The multitude of refractory aggregates and the variety of bonding agents enables endless combinations of unshaped refractory products. The installation type like casting, gunning, ramming needs also be considered during the development process. The service life of unshaped products depends largely on the correct choice and installation on site. In contrary to refractory bricks, unshaped materials achieve their final ceramic properties with the heat treatment in the application. It is therefore extremely important for the developer of such materials to know about the future operating conditions for selecting the right combination of raw materials.

Almatis offers the whole range of raw materials required for the development of high alumina unshaped refractories.

Tabular & other Aggregates

Tabular Alumina T60/T64

Dense, sintered crystalline alpha alumina with 99,5% Al2O
High purity and chemical resistance

Spinel AR 78

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

Spinel AR 90

More Alumina-rich spinel (90% Al2O3)
Used in monolithics and bricks for steel applications

BSA 96

Dense, sintered aggregate with 96% Al2O3 and 1,2% TiO2
Replacement for Brown fused alumina

Bonite/Bonite LD

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

Cement & Binders

CA-14 M

High purity cement with 70% Al2O3; additive free
General purpose; moderate setting

CA-14 S

High purity cement with 70% Al2O3; additive free
General purpose; slow setting

CA-14 W

High purity cement with 70% Al2O3; additive free
General purpose; faster setting

CA-25 C

High purity cement with 80% Al2O3; includes additives
Extended casting life and excellent surface finish

CA-25 M

High purity cement with 80% Al2O3; includes additives
General purpose, moderate setting

CA-270

Special high purity cement with 70% Al2O3; additive free
Excellent flow properties and high strength

CA-470 TI

High purity cement with 70% Al2O3; additive free
Temperature Independent; avoids “never setting”-phenome

Alphabond 300

Hydratable alumina binder; calcia-free
Enabling high purity no-cement formulations

Calcined Aluminas

CT 9 FG

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

A2 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%

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 = 4.1µm
Na2O Content = 0.35%

A 3000 FL

Bi-modal alpha-alumina
Particle size / D50 = 1.9µm
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%

Dispersing Aluminas

ADS 1

For silica fume-free castables
Retarding component

ADS 3

For silica fume-free castables
Strong retarding component

ADW 1

For silica fume-free castables
Accelerating component

M-ADS 1

For silica fume containing castables
Retarding component

M-ADS 3

For silica fume containing castables
Strong retarding component

M-ADW 1

For silica fume containing castables
Accelerating component

News & Events