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Insulating Brick

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Alumina Insulating Fire Brick

Alumina Insulating Fire Brick
  • It is used for the construction of furnace lining and insulating layer, and the parts without erosion or scouring action of intense high temperature melting material. The surface contact temperature shouldn’t be higher than 1350℃ when it is expose
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Introduction

Alumina Insulating Fire Brick is called high alumina insulating brick or light weight insulating brick, too. The Al2O3 of it is more than 48%. It is a kind of light weight refractory material, which is mainly composed of mullite, glass phase or corundum.


We produced it with high bauxite and little clay, by levigating, gas bubble method or bubble act, casting and shaping with slurry, firing under the temperature of 1300~1500℃.


Performance

1. Low heat conductivity; 2. High strength, corrosion resistance; 3. Low heat capacity; 4. Low shrinkage; 5. High insulation; 6. High refractoriness; 7. Low bulk & density.


Application

It is used for the construction of furnace lining and insulating layer, and the parts without erosion or scouring action of intense high temperature melting material. The surface contact temperature shouldn’t be higher than 1350℃ when it is exposed to flame directly.


Physical and Chemical Index

Item

Light Weight Brick

LG-1.0

LG-0.9

LG-0.8

LG-0.7

LG-0.6

LG-0.5

LG-0.4

Al2O3

≥48

Fe2O3

≤2.0

Bulk Density (g/cm3)

≤1

≤0.9

≤0.8

≤0.7

≤0.6

≤0.5

≤0.4

Cold Crushing strength (Mpa)

≥3.92

≥3.43

≥2.94

≥2.45

≥1.96

≥1.47

≥0.78

Thermal Conductivity Coefficient (W/mk)

≤0.45

≤0.45

≤0.35

≤0.35

≤0.3

≤0.25

≤0.2

Permanent Linear Change Rate (max 2%) (℃)

1400

1400

1400

1350

1350

1250

1250

 


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