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Product introduction of bubble alumina brick
Bubble alumina brick is a new type of high temperature insulation material. It is formed by melting and blowing industrial alumina in an electric furnace. With aluminum oxide bubble as the main part, products of various shapes can be made, and the maximum working temperature is 1800 ℃.
The mechanical strength of bubble alumina bricks is very high, which is several times of that of ordinary light products, while the bulk density is only half of that of corundum products.
Application of bubble alumina brick
Bubble alumina bricks are widely used in high-temperature and ultra-high temperature kilns such as gasifiers in petrochemical industry, reaction furnaces in carbon black industry, induction furnaces in metallurgical industry, and have achieved very good energy-saving results.
Parameters of bubble alumina brick
| Index | Level I | Level II | Level III |
| Al2O3, % | ≥98 | ≥98 | ≥98 |
| SiO2, % | ≤1 | ≤1 | ≤1 |
| Fe2O3, % | ≤0.7 | ≤0.7 | ≤0.7 |
| Refractoriness under load, ℃ | ≥1790 | ≥1790 | ≥1790 |
| Refractorines under load, 0.1MPa, ℃ | ≥1600 | ≥1600 | ≥1600 |
| Bulk density, g/cm3, ≤ | 1.2 | 1.4 | 1.6 |
| True porosity, %, ≥ | 62 | 60 | 58 |
| Cold crushing strength, MPa, ≥ | 3 | 10 | 12 |
| Thermal Conductvity, 1100℃, W.(m.k), ≤ | 0.93 | 1.04 | 1.16 |