The
castables are made of porous aggregates in Al2O3-SiO2 system and
cenospheres as light weight raw materials, with optimized particle size
distribution. The placement is carried out by casting. They are characterized
by good insulation, broad application range, high strength and good
workability, and can be widely used as insulating layers of various industrial furnaces.
Properties specification of conventional lightweight castables in Al2O3-SiO2 system
|
Type |
SR-LW-0.5 |
SR-LW-0.8 |
SR-LW-1.0 |
SR-LW-1.3 |
SR-LW-1.5 |
SR-LW-1.8 |
SR-LW-2.0 |
|
|
Chemical analysis (%) ≥ |
Al2O3 |
38 |
40 |
40 |
40 |
45 |
45 |
45 |
Bulk density (g/cm3) |
110℃×24h |
0.5±0.1 |
0.8±0.1 |
1.0±0.1 |
1.3±0.1 |
1.5±0.1 |
1.8±0.1 |
2.0±0.1 |
|
Compressive strength Mpa ≥ |
110℃×24h |
0.8 |
1.5 |
2 |
3 |
4 |
5 |
6 |
|
1000℃×3h |
1 |
2 |
3 |
4 |
— |
— |
— |
|
|
1300℃×3h |
— |
— |
— |
— |
10 |
15 |
20 |
|
Permanent change (%) |
1000℃×3h |
-1.0～0 |
-1.0～0 |
-1.0～0 |
-0.5～0 |
-0.5～0 (1300℃) |
-0.5～0 (1300℃) |
-0.5~0 (1300℃) |
|
Thermal conductivity | ||||||||
Main raw material |
Porous aggregates in Al2O3-SiO2 system and cenospheres |
|||||||
