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Visor Refractory logo Visor Refractory Industrial refractory solutions from Ahmedabad
Product Range

Refractory bricks for high-temperature lining duty.

Visor Refractory offers fire clay bricks, high alumina bricks and insulating bricks manufactured for thermal performance, abrasion resistance and industrial lining requirements.

Fire clay and high alumina grades for boilers, foundries, kilns and furnace areas.
Insulating brick options for backup lining and thermal efficiency.
Technical data preserved from the legacy site and now easier to read on smaller screens.
Refractory bricks
IS 8 refractory brick

Fire clay grades

Used for chimney flues, boilers, cupolas and foundry applications.

Fire bricks

High alumina bricks

Higher grade compositions for stronger heat-duty and specialized furnace zones.

Insulation bricks

Insulating bricks

Designed for backup lining where lower density and thermal efficiency matter.

Refractory brick product

Industrial applications

Suitable for cement, boiler, furnace, steel and reheating applications depending on grade.

Fire clay bricks and high alumina bricks

Dense brick grades for different alumina ranges, service conditions and application areas.

Particulars Al2O3 % min. Fe2O3 % max. P.C.E. (O.C.) Apparent porosity % max. CCS (kg/cm2) RUL (TA deg C) max. Bulk density (g/cc) min. PLC % max. Application area
VR IS 6 30 2.5 29 26 200 1300 2.00 ±1.0% @ 1300 deg C / 2 hrs For chimney flue, boiler and sugar industry.
VR IS 8 34 2.5 30 25 250 1350 2.05 ±1.0% @ 1350 deg C / 2 hrs For chimney flue, boiler, cupola and steel foundry.
VR 40 40 2.8 32 24 300 1400 2.15 ±1.0% @ 1400 deg C / 2 hrs For cement preheater, cyclone, silicate furnace and other moderate heat duty applications.
VR 50 50 3.0 33 24 400 1400 2.30 ±1.0% @ 1450 deg C / 2 hrs Low porosity dense bricks for furnace backing and blast furnace use.
VR 60 60 3.5 35 24 450 1450 2.50 ±2.0% @ 1450 deg C / 2 hrs For calcination zone of cement rotary kiln and copper melting furnace.
VR 70 70 3.5 36 23 550 1460 2.60 ±2.5% @ 1500 deg C / 2 hrs For reheating furnace wall, burning zone of cement rotary kiln and ladle backup.
VR 80 80 1.8 37 20 600 1520 2.75 ±0.5% @ 1500 deg C / 2 hrs For EAF reset, ladle lining and other high heat duty special applications.

Insulating bricks

Lightweight insulating grades for backup lining and thermal control.

Particulars VR CFI VR HFI VR HFK
Chemical properties
SiO2 (%) 69.7 61.5 54.1
Al2O3 (%) 24.3 33.2 41.5
Fe2O3 (%) 2.2 1.9 1.8
TiO2 (%) 2.0 2.5 1.9
CaO + MgO (%) 0.5 0.3 0.2
Others (%) 0.9 0.6 0.5
Max. temp. (deg C) 1000 1350 1400
Physical properties
Reversible thermal expansion (% at 1000 deg C) - 0.50 0.50
BD (gm/cm3) max. 0.90 1.05 1.0
AP (%) min. 60 55 55
CCS (kg/cm2) min. 10 25 25
PCE (Orton) min. 20 29 30
PLC (%) max. ±1.5 at 1000 deg C / 5 hr ±1.5 at 1350 deg C / 5 hr ±1.5 at 1400 deg C / 5 hr
Thermal conductivity at 300 deg C - 0.24 0.26
500 deg C - 0.26 0.29
800 deg C - 0.28 0.31
Application area Backup lining for boiler and reheating furnace. Backup lining for glass tank furnace and blast furnace. Backup lining for glass tank furnace and blast furnace.

Need a brick grade matched to your duty condition?

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