The technical index of refractory high alumina cement :
|
Index
Items
|
AL-65
|
AL-70
|
AL-75
|
AL-80
|
|
|
Chemical (%)
|
Al2O3
|
63.5~66.5
|
68.5~71.5
|
73.5~76.5
|
78.5~81.5
|
|
|
CaO
|
32.5~34.0
|
26.5~30.5
|
24.0~26.0
|
17.0~20.0
|
|
|
SiO2
|
≤0.5
|
|
|
Fe2O3
|
≤0.5
|
|
|
TiO2
|
≤0.01
|
|
|
MgO
|
≤0.15
|
|
|
Specific surface area(m2/Kg)
|
≥5000
|
≥5000
|
≥5500
|
≥7000
|
|
|
Initial setting time (min)
|
≥40
|
≥45
|
≥30
|
≥15
|
|
|
Final setting time (h)
|
≤6
|
≤6
|
≤6
|
≤6
|
|
|
Compression strength(MPa)
|
Conservation for 24hrs
|
≥45.0
|
≥40.0
|
≥40.0
|
≥35
|
|
|
Rupture strength(MPa)
|
≥6.0
|
≥5.0
|
≥4.5
|
≥4.0
|
|
|
|
|
Refractoriness(°C)
|
1560
|
1560
|
1790
|
1790
|
|
|
Test Standard
|
KTB01013-2004
|
|
|
Package
|
Woven bag with plastic lining 25kg/bag
|
|
|
Usage
|
For atypic refractory material
|
