Antialkali thermal insulation brick

Mark

Normal Type

Chemical composition (%)

Al2O3

25~30

Fe2O3

≤2

SiO2

65~70

Refractoriness(℃)

≥1650

Density(g/cm3)

2.1

Apparent porosity (%)

≤25

Compressive strength (MPa)

≥25

Refractoriness under load T0.6（℃）﹚

≥1350

Thermal expansion rate(900℃) [%]

0.7

Thermal conductivity/ (350℃) [W/(m·K) ]

1.28

Thermal shock resistance（1100℃→water cold）[times]

≥10