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Alumina bubble brick is a high-quality thermal insulation material, which can be used as a kiln lining as an insulation layer, which can reduce the weight of the furnace body and optimize the kiln structure. The refractoriness of alumina bubble brick can reach more than 1750 degrees, and the thermal stability is good.

Parameters of alumina bubble brick

Physical and chemical indicators：

Item	Index
Item	LQZ99-1.4	LQZ99-1.6	LQZ99-1.8
Al₂O₃ %	≥99
SiO₂ %	≤0.3
Fe₂O₃ %	≤0.2
Bulk density g/cm³	1.3~1.5	1.5~1.7	1.7~1.9
Cold Crush Strength MPa	≥6	≥10	≥12
Thermal conductivity W/(m·K) Hot surface 1000℃	≤0.9	≤1.1	≤1.2
Permanent Linear Change Rate % 1600℃×3h	±0.3

Item	Index
Item	LQZ95-1.4	LQZ95-1.6	LQZ95-1.8
Al₂O₃ %	≥95
Fe₂O₃ %	≤0.2
Bulk density g/cm³	1.3~1.5	1.5~1.7	1.7~1.9
Normal temperature compressive strength MPa	≥8	≥12	≥16
Thermal Conductivity W/(m·K) hot face 1000℃	≤0.9	≤1.1	≤1.2
Permanent Linear Change Rate % 1600℃×3h	±0.3

Item	Index
Item	LQZ90-1.4	LQZ90-1.6	LQZ90-1.8
Al₂O₃ %	≥90
Fe₂O₃ %	≤0.2
Bulk density g/cm³	1.3~1.5	1.5~1.7	1.7~1.9
Normal temperature compressive strength MPa	≥10	≥14	≥18
Thermal Conductivity W/(m·K) Hot face 1000℃	≤0.9	≤1.1	≤1.2
Permanent Linear Change Rate % 1600℃×3h	±0.3

Advantages of alumina bubble brick

Small volume density
Low thermal conductivity
Usage temperature is above 1750℃
High strength
Can withstand the impact of high-temperature flame
Save energy
Acid and alkali corrosion resistance

Benefits of using alumina bubble brick

From the perspective of cost, the price of heavy bricks and hollow ball bricks is similar, and the price of alumina hollow ball bricks for particular areas may be slightly higher than that of heavy bricks. Still, in terms of weight, the use of hollow ball bricks can reduce the cost per cubic meter. 1-2 tons. Moreover, there is no need to make an insulation layer, which reduces the amount used and saves fuel. Not only is the use effect good but the cost is also reduced.

Application of alumina bubble brick

Alumina bubble brick is a commonly used thermal insulation material in the kiln, which plays a vital role in kiln construction and production. The volume density of alumina bubble brick is small, which can reduce the weight of the furnace body well, and has a good Insulation effect, which can save energy and raw material costs.