The lightweight thermal insulation castable is made of perlite, vermiculite, shale ceramite, polylight ball, plus cement combined, and constructed after on-site mixing.
Lightweight thermal insulation castable has the advantages of high strength, small bulk density, low thermal conductivity, good thermal insulation performance, convenient construction, etc., and is an ideal choice for industrial boiler insulation materials.
Construction method: vibration or manual ramming construction.
Main function: heat insulation, reduce the external temperature of the furnace wall.
Physicochemical index of lightweight thermal insulation pouring (acid-resistant type):
|
SiO2（%）≥ |
40 |
45 |
45 |
48 |
52 |
|
Bulk density （g/cm3） ≥ |
0.8±0.2 |
1.2±0.2 |
1.6 |
1.8 |
2 |
|
cold crushing strength（MPa） ≥ |
3 |
4 |
5 |
8 |
10 |
|
Acid resistance (%)≥ |
90 |
95 |
95 |
95 |
95 |
|
Thermal conductivity（350℃±25℃，W/m.K）≤ |
0.25 |
0.45 |
0.5 |
0.55 |
0.6 |
|
Operating temperature（℃） |
600 |
700 |
800 |
900 |
1000
|
