White corundum brick is a kind of high alumina refractory bricks, and mainly produced and applied as extreme working conditions. Corundum brick is made of high purity fused alumina power, white fused alumina oxide tabular alumina, adding with other binders like refractory clays, reactive alumina power, and high purity silica.
Corundum bricks are calcined at high temperatures to form a matrix with mullite, mullite-curundum or corundum, which making corundum brick with excellent volume stability structure and service temperature can be reach to 1900° C.
Application:
White corundum mainly used for extreme high temperature, such as the key parts of industrial furnace of steel, electronics, petrochemical, fertilizers, non-ferrous metals, refractory materisla, etc.
Professional Suggestions:
Considering corundum bricks superior characters, they are quite important in industrial furnace application, expecially chemical industry and for the production of carbon black. Recent years, following the development of refractories, suitable addition of chormium oxide, zirconium ixide, or phosphates has improved bricks' excellent structural flexibility, to length service life of ash melting furances and gas reactors in incinerators.
| Item/Type | Ultra Purity Corundum Brick | 99 Corundum Brick | 90 Coundum Brick | Corundum Mullite Brick |
| Al2O3% | 99.3 | 98.5 | 90 | 80 |
| SiO2% | 0.15 | 0.3 | 8.5 | 18.5 |
| Fe2O3%() | 0.1 | 0.2 | 0.2 | 0.3 |
| Bulk Density(g/cm3) | 3.25 | 3.25 | 3.1 | 2.9 |
| Apparent Porosity% | 18 | 18 | 18 | 18 |
| Cold Crushing strength, Mpa | 100 | 100 | 120 | 120 |
| Refractoriness under load,0.2Mpa | 1700 | 1700 | 1700 | 1700 |
| Porisity(%) | 22-26 | 20-24 | 20-22 | 20-23 |
| Reheating linear change rate, % 1450 C, 2h | 8.1 | 8.1 | 8.1 | 7.6 |
| Size(mm) | 230*114*65 | 230*114*65 | 230*114*65 | 230*114*65 |
