Good Quality Bubble Alumina Brick for Rotary Kiln

1.Product introduction of bubble alumina brick

Bubble alumina brick is a new type of high temperature insulation material. It is formed by melting and blowing industrial alumina in an electric furnace. With alumina bubbles as the main body, it can be made into various shapes with a maximum working temperature of 1800°C. The mechanical strength of these products is very high, several times that of ordinary lightweight products, while the bulk density is only half that of corundum products.

2.Advantages of bubble alumina brick

Bubble alumina insulation brick can reach more than 1750 degrees, good thermal stability, small change rate of re-burning line, durable. Strong thermal insulation performance and low thermal conductivity.
Widely used in petrochemical industry gasification furnace, carbon black industry reaction furnace, metallurgical industry induction furnace and other high temperature, high temperature furnace.

3.Parameters of bubble alumina brick

IndexLevel ILevel IILevel III
Al2O3, %≥98≥98≥98
SiO2, %≤1≤1≤1
Fe2O3, %≤0.7≤0.7≤0.7
Refractoriness under load, ℃≥1790≥1790≥1790
Refractorines under load, 0.1MPa, ℃≥1600≥1600≥1600
Bulk density, g/cm3, ≤1.21.41.6
True porosity, %, ≥626058
Cold crushing strength, MPa, ≥31012
Thermal Conductvity, 1100℃, W.(m.k), ≤0.931.041.16