Low cement castable refers to a new type of castable with a small combined dosage, CaO content below 2.5%. The key point is the use of ultra-fine particles not exceeding 1 μm. Its thermal shock resistance, slag resistance and erosion resistance have been significantly improved, better than similar refractory bricks. The purpose of reducing the amount of cement is to improve the fire resistance of the castable.
Low cement castable is widely used in various kinds of industrial furnace lining, such as blast furnace, hot blast stove, heating furnace, iron runner cover, electric furnace top, ceramic kiln, cement kiln, boiler, chemical furnace, etc..
|
Item |
1 |
2 |
3 |
4 |
5 |
6 |
|
|
Chemical Analysis % |
Al2O3 |
>45 |
>48 |
>50 |
≥60 |
>70 |
75 |
|
|
CaO |
1.5 |
2.4 |
2.4 |
1.7 |
1.5 |
1.3 |
|
Compressive Strength/MPa |
110℃*24H |
30 |
33 |
35 |
50 |
70 |
100 |
|
|
1100℃*3H |
55 |
58 |
60 |
60 |
82 |
110 |
|
Flexural Strength/MPa |
110℃*24H |
7 |
7 |
7 |
8 |
10 |
100 |
|
Liner Change After Burning % |
1800℃ |
2.38 |
2.40 |
2.42 |
2.45 |
2.69 |
2.72 |
(Specification should be different according to different furnaces/kilns.)
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