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Insulating Bricks

Conforming to international quality standards, our insulating bricks have high heat resistant and durability. To suit varied applications, these light weight bricks are offered in various grades and specifications including high alumina content (50 %, 60% & 70 %).
These insulating bricks are widely applied in glass plant furnaces and boilers as they provide perfect insulation from heat. We also offer light weight bricks and alumina bricks in custom specifications.

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TECHNICAL SPECIFICATION

PRODUCT IM- INS-110 IM- INS-135 IM-INS-140 IM-INS-500 IM-INS-700 IM- INS-650 IM- INS-750
CHEMICAL:
SiO 2 % 69.7 61.5 54.1 49.14 35.4 38.92 41.32
Al 2 O 3 % 24.3 33.2 41.5 43.8 55.7 53.7 51.2
Fe 2 O 3 % 2.2 1.9 1.8 0.95 1.4 1.38 1.26
TiO 2 % 2 2.5 1.9 1.75 2.8 2.6 2.5
CaO + MgO % 0.5 0.3 0.2 3.6 3.65 2.08 2.17
Others % 0.9 0.6 0.5 0.76 1.05 1.32 1.55
Max. Service Temp. ° C 1000 1350 1400 1300 1400 1430 1430
Nature of Bond Ceramic Ceramic Ceramic Chemico Ceramic Chemico Ceramic Chemico Ceramic Chemico Ceramic
Raw Material Base Fire Clay & Mica Fire Clay & Kyanite Fire Clay& Kyanite Synthetic Alumina Synthetic Alumina Synthetic Alumina Synthetic Alumina
PHYSICAL:  
Reversible Thermal Expansion % at 1000 ° C - 0.5 0.5 0.55 0.55 0.55 0.55
BD gm/cm ³ Max 0.9 1.05 1 0.55 0.8 0.65 0.8
AP % Min. 60 55 55 - - - -
CCS kg/cm 2 Min. 10 25 25 7 13 25 40
PCE orton Min. 20 29 30 23 30 30 31
PLC % Max. ± 1.5 ± 1.5 ± 1.5 ± 1.0 ± 1.5 ± 1.5 ± 1.5
at 1000 ° C/ 5hr at 1350 ° C/ 5hr at 1400 ° C/ 5hr at 1300 ° C/ 5hr at 1400 ° C/ 5hr at 1430 ° C/ 5hr at 1430 ° C/ 5hr
Thermal Conductivity
300 ° C - 0.24 0.26 0.17 0.2 0.21 0.21
500 ° C - 0.26 0.29 0.18 0.23 0.23 0.24
800 ° C - 0.28 0.31 0.21 0.27 0.26 0.28
Wt. Of std. Brick (approx.) kg. 230x114x76 mm 1.70 2.10 2.00 1.10 1.50 1.30 1.60
Application Area Backup lining for Boiler reheating furnace Backup lining for Glass tank furnace, Blast furnace. Backup lining for Glass tank furnace, Blast furnace. As a backup lining for special application As a backup lining for special application As a backup lining for special application As a backup lining for special application

IM HF23 IM HF26 IM HF28 IM HF29 IM HF30 IM HF32
Classification Temperature 0 C 1300 1450 1550 1600 1650 1700
Properties measured at room temperature
Density (gm/c) 0.55 0.7 1 1.05 1.1 1.3
Modulus of rupture (kg/cm 2 ) 11 12 - - - -
Cold Crushing Strength (kg/cm 2 ) 16 25 30 40 60
High temperature performance
PLC after 24 hrs .  
at 1250 0 C ±0.6 ±0.1 - - - -
1350 0 C - ±0.5 ±0.1 - - -
1450 0 C - - ±0.5 ±0.2 -
1500 0 C - - - ±0.5 - -
1550 0 C - - - - ±0.5
1600 0 C - - - - - ±0.5
Thermal Conductivity at mean temperature of  
400 0 C    
600 0 C 0.16 0.22 0.36 0.37 0.4 0.5
800 0 C 0.18 0.24 0.4 0.41 0.44 0.54
1000 0 C 0.2 0.27 0.44 0.45 0.48 0.58
0.22 0.3 0.48 0.5 0.52 0.6
Chemical Composition
Al 2 O 3 (%) 42 60 60 60 72 72
Fe 2 O 3 (%) 0.65 0.7 1 1 0.8 0.6
CaO (%) 10 6 - - - -

Conventional Insulating Bricks

IM LW IM LWS IM HIS IM CFI IM CFS IM HFI IM HFK
Physical Properties
P.C.E. Orton 30 30 31 30 30 30 32
Service Temp. 0 C 1200 1200 1300 1250 1250 1300 1400
B.D. gm/cc 1.0-1.1 1.2-1.3 1.6 0.7-0.8 0.55-0.65 0.8-0.9 4.0-1.1
A.P. % 55 50 45 65 70 60 55
CCS Kg/cm 2 30 70 150-200 15-Oct 10-Aug 15-20 40
Thermal Conductivity at 600 0 C Hot Face K/cal/m/hr. 0 C max. 0.4 0.5 0.6 0.3 0.195 0.35 0.45
Chemical Properties
Al 2 O 3 30 30 35 30 30 30 40
Fe 2 O 3 2.5 2.5 2.5 2.5 2.5 2.5 2.5

Remarks: Size tolerance: ± 1.5% or 2.. whichever is greater.
The above data are not guaranteed value. They represent typical average properties.


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