Items

Index

SiO2

70 ± 5%

Al2O3

20% min

Fe2O3

7% max

Acid Resistance

                         98% min

Soaked in 5 ~ 6% Sulfuric Acid 30 days and strength reduction shall be

less than 5%

Bulk Density

1.9 ± 0.05 g/cm3

Compressive Strength

20 Mpa min

Refractoriness

1300°C

Water Absorption

17% max