Brief Introduction
High-alumina castables are made of high-alumina bauxite aggregate as the main raw material, and according to the proportions of different granules, calcium aluminate cement binders and admixtures are added to mix the bulk cast refractory castables.
Technical Datas
| Index | High Alumina Castable | |
| Al2o3 % | 65 | |
| Sio2 % | 30 | |
| Cao % | 6 | |
| Bulk density g/cm³ | 110℃，24h | 2.5 |
| 1350℃，24h | 2.6 | |
| Cold bending strength MPA | 110℃，24h | 6 |
| 1350℃，24h | 7.5 | |
| Hot bending strength MPA | 110℃，24h | 45 |
| 1350℃，24h | 60 | |
| 1350 Burning line rate of change | 0.2 | |
| Mixing water consumption % | 10-12% | |
| Operating temperature | 1400 | |
Features
1. Good corrosion resistance;
2. High refractory temperature and high softening temperature under load;
3. High compressive strength, excellent thermal shock resistance;
4. The construction is convenient. It can be directly poured on the industrial furnace to form a whole lining, or it can be prefabricated into refractory prefabricated blocks and used for masonry in the industrial furnace.
Application
The service temperature of high-alumina castable is 1400~1550℃, which can be used as lining of various heat treatment furnaces and burners, tapping trough of electric furnace, high temperature section of lime shaft kiln, kiln head of rotary kiln, power plant boiler, etc.