Refractory alumina bubble brick for funace kiln boiler

Ingredient

bubble alumina,corundum powder,Calcined powder as raw material etc

Max service temperature

1800℃

Advantages

1 high temperature resistance

2 low thermal conductivity, good thermal insulation

3 low bulk density

4exnt resistance to acids and alkalis corrosion

Size and specifications

230x114x65mm

The size, density, chemical composition can be customized.

Al2O3％≥

84

90

98.5

98.5

98.5

Fe2O3％≥

0.8

0.5

0.3

0.3

0.3

SiO2％≤

15

9

1.0

1.0

1.0

Bulk Density

(g/cm3 ≥)

1.5

1.5

1.2

1.5

1.7

Compressive

strength

at normal temperature

(MPa≥)

16

15

3

12

15

Porosity % ≥

58

60

62

60

58

Refractoriness under load at0.1Mpa

KD °C≥

1650

1700

1700

1700

1700

Refractoriness

(°C)≥

1800

1800

1800

1800

1800

Hot side 1000°CW/m.k ≤

1.2

1.5

0.95

1.05

1.15