Refractory Bricks
low cement refractory castable

low cement refractory castable

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


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