Description Of Corundum Castable
The corundum castable is a refractory castable prepared with corundum as the aggregate and powder plus some binders. It has higher mechanical strength and anti-abrasion performance than high-aluminum castables and mullite castables, but its thermal shock resistance is slightly inferior. It is mainly used in boilers, blast furnace stoves, heating furnaces, ceramic kilns and other kilns. Furnace lining material.
Performance Of Corundum Castable
(1) High compressive strength and high stability of the high temperature lining.
(2) Large bulk density, overall lining resistance to slag erosion and strong permeability.
(3) Anti-solid particles, dust, high-temperature gas flushing.
(4) Small mechanical abrasion resistance.
(5) Not affected by reducing gases such as H2 and CO.
(6) The construction is convenient. It can be cast into an integral lining, or it can be poured into prefabricated blocks or prefabricated parts.
Technical Datas Of Corundum Castable
| Index | Corundum Castable Refractory | |
| Model | RS-85 | |
| Chemical Composition（%） |
Al2o3 ≥ | 85 |
| Sio2 ≤ | 6 | |
| Bulk density g/cm³ | 110℃，24h ≥ | 2850 |
| Cold bending strength MPA | 110℃，24h ≥ | 8 |
| 1100℃，3h ≥ | 12 | |
| 1350℃，3h ≥ | 12 | |
| Cold pressure strength MPA | 110℃，24h ≥ | 80 |
| 1100℃，3h ≥ | 95 | |
| 1350℃，3h ≥ | 110 | |
| Burning line rate of change | 1100℃，3h ≥ | -0.3 |
| 1350℃，3h ≥ | -0.5 | |
| Mixing water consumption % | 5-6% | |
| Operating temperature ℃ | 1600 | |
Application Of Corundum Castable
The using temperature of corundum castables is in the range of 1550-1600°C. It is mainly used for lining materials of various high-temperature kiln furnaces and high-temperature structures, such as the immersed tube outer lining of molten steel vacuum degasser, spray metallurgy and argon blown overall linings. Body, circuit top triangle lining, LF furnace lid, high-temperature wear-resistant lining of catalytic cracking reactor in petrochemical industry, circulating fluidized bed and high-temperature wear-resistant lining of power plant boiler.