DRK
Brand
DRK-1
Chemical Composition
(%)
SiO 2 min
94
Fe 2 O 3 max
-
Al 2 O 3 max
Na 2 O+K 2 O
Max
CaO max
Apparent Porosity (%) max
23
Cold Crushing Strength
(N / MM 2 ) min
20
25
True Density (g/m 3 ) max
2.37
2.35
Refractoriness Under Load at ℃ , min
1640
Permanent Linear Change at
1450 ℃ min
0.4
0.2
Residue Quartz （ % ） max
6
