High Alumina Castable (Cement Free)
Castable
Item Code：A4301
High alumina castable, which is mainly made from high alumina aggregate, fine powder and unique liquid silica sol adhesive, is a multicomponent system to the clients.Application
High alumina castable is mainly applied in the repair of mullite matrix bricks in flame space of glass furnace, sealing layer of furnace bottom, forehearth, regenerator bottom, side wall, flue and other low temperature areas.Characteristics
High alumina castable has high strength and density, low porosity and abrasion, and good thermal shock performance as well as erosion resistance. Additionally, it owns good fluidity and plasticity in the construction process.Physical and Chemical Indicators
| Performance | Item | Indicators |
| Chemical composition after calcination（%） | SiO2 | 29.0-34.0 |
| Al2O3 | 63.0-69.0 | |
| Alkalis | <0.4 | |
| CaO | <0.1 | |
| Fe2O3 | <0.8 | |
| TiO2 | <1.0 | |
| Physical properties | AP（%） | 13-16 |
| BD（g/cm3) | 2.5-2.6 | |
| CCS（Mpa）816℃ 1400℃ | 30.5-40.0 82.0-113.0 | |
| Applied limit temperature℃ | 1760 | |
| Linear change on reheating（%） | -0.3 ～ 0.1 | |
| Water content（%） | 0 |
Note: The above data are obtained under ideal laboratory conditions. The actual results in application may be varied according to different tests and installation methods.