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Insulating firebrick

Insulating firebrick

Grade 23-30
Classification Temperature:1300-1550
Size:230x114x64-76mm
Density:600-1000kg/m3

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Features
Low thermal conductivity
High purity and low iron content
Good thermal resistance with direct access to fire
Superior thermal shock resistance
Accurate dimension and easy cutting


Typical Applications
Cracking furnace
Conversion furnace
Heating equipment
Refining equipment
Reproduction equipment
Hot blast stove


Description
Insulating firebricks gains typical advantages including low thermal conductivity, fine thermal shock resistance, low heat containment and low iron content,Meanwhile,the outstanding mechanical flexibility, coupled with high insulating efficiency expands the extensive applications of IFB in a variety of industrial markets.
Our insulating firebrick is manufactured from high-grade refractory powder and materials in good purity. During the process of production, organic and multiple filling materials are according to the required proportion, the brick is compressed in vacuum and sintered under high temperature.

Description Grade 23 Grade 26 Grade 28 Grade 30
Classification Temperature 1300C/2300F 1400C/2600F 1500C/2732F 1550C/2822F
Density(kg/m3) 600 800 900 1000
Cold Crushing Strength (MPa) 1.2 1.8 2.5 3.3
Modulus of Rupture(MPa) 1.0 1.7 2.3 3.1
Permanent Linear Change (%)x24hrs ≤0.6 ≤0.6 ≤0.8 ≤0.9
Thermal Expansion  (%)1000C 0.5 0.52 0.52 0.53
Thermal Conductivity (W/m.k) 350C 0.18 0.25 0.33 0.38
400C 0.20 0.29 0.35 0.40
600C 0.24 0.32 0.37 0.42
Chemical Composition
(%)
Al2O3 42 56 67 73
SiO2 55 41 30 24
Fe2O3 ≤1 ≤0.8 ≤0.7 ≤0.7
K2O+Na2O 1.1 1.7 1.7 1.7
 
   
     High temperature Binder
     25KGS/50KGS per drum

 
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