Description
Alumina bubble brick is made primarily from alumina hollow balls and alumina powder, combined with other binders and fired at a high temperature. It is a type of ultra-high temperature energy-saving thermal insulation material. The characteristics of these bricks include excellent thermal insulation properties (low thermal conductivity and high thermal resistance), high fire resistance, chemical stability, good thermal stability, and a certain degree of mechanical strength.
Specifications
| Item | LQZ-99 -1.4 | LQZ-99 -1.6 | LQZ-99 -1.8 | LQZ-95 -1.4 | LQZ-95 -1.6 | LQZ-95 -1.8 | LQZ-90 -1.4 | LQZ-90 -1.6 | LQZ-90 -1.8 |
| ω(Al₂O₃) / % ≥ | 99 | 95 | 90 | ||||||
| ω(SiO₂) / % ≤ | 0.3 | – | – | ||||||
| ω(Fe₂O₃) / % ≤ | 0.2 | 0.2 | 0.2 | ||||||
| Bulk density / (g/cm³) | 1.3~1.5 | 1.5~1.7 | 1.7~1.9 | 1.3~1.5 | 1.5~1.7 | 1.7~1.9 | 1.3~1.5 | 1.5~1.7 | 1.7~1.9 |
| CCS / MPa ≥ | 6 | 10 | 12 | 8 | 12 | 16 | 10 | 14 | 18 |
| λ [W/m·k] (350±25℃) ≤ | 0.9 | 1.1 | 1.2 | 0.9 | 1.1 | 1.2 | 0.9 | 1.1 | 1.2 |
| HPLC (1600℃×3h) / % | -0.3~+0.3 | -0.3~+0.3 | -0.3~+0.3 | ||||||
Applications
Used as insulation and working layers in the linings of blast furnace hot blast stoves, heating furnaces, soaking pits, and other furnaces;
Used as the insulation layer of the tank wall, breast wall, and other sections of glass melting furnaces.
Used as linings and insulation layers in the kilns of tunnel kilns, shuttle kilns, roller kilns, and other glass furnaces;
Used for thermal insulation in the furnace chambers, flues, air preheaters, and other parts of boilers in thermal power plants;
Used as insulation layers in furnaces for non-ferrous metal smelting.
