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low cement refractory castable
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Low cement series refractory castable refers to the calcium aluminate cement added less than 8% of the castable refractory. The CaO content in the castable is less than 2.5%.Its main products are low cement, ultra-low cement and cement-free refractory castable, with high density, low porosity, high strength, low wear, heat shock and erosion resistance and other characteristics.
Items
clay castable
high alumina castable
corundum castable
chrome corundum castable
SiC corundum castable
Magnesia alumina castable
Chemical Composition
%
Al2O3
>45
>60
>90
>90
>60
60-78
Cao
<2.4
<1.5
<1.5
<1.5
<1.5
<2.5
SiC
Cr2O3 2-3
>12
MgO 8-15
Cold Crushing Strength
Mpa
110℃
30-35
50-75
45-90
≥50
>35
20-35
1000℃
55-60
60-110
60-120
-
>35
16-80
1500℃
70-80
80-130
80-150
≥80
>60
30-110
Flexural strength
Mpa
110℃
5~8
7~10
8~12
≥10
5~6
4.6-14
1000℃
7~9
8~14
9~15
-
6~7
2.4-32
1500℃
8~10
13~18
10~18
≥25
8~10
7.2-38
reheating change rate
% 1500℃
±0.5
±0.4
±0.3
±0.3
0~(+0.5)
-1.0~(+1.5)
bulk density/g.cm3
2.35-2.45
2.42-2.72
2.95-3.1
>3.10
>2.6
2.65-3.00
