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.
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Advantages
Alumina bubble brick is an ultra-high temperature energy-saving insulation material characterized by its low bulk density and exceptionally low thermal conductivity (0.2~0.5 W/(m·K)). It offers high mechanical strength, good thermal shock resistance, and excellent chemical stability, enabling reliable long-term performance in environments up to 1800°C.
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 | ||||||
Product Size: We offer refractory brick sizes that comply with ISO, EN, ASTM, JIS, etc, and customized sizes.
Applications
- Iron and Steel Industry: Insulation and working layers in blast furnace hot blast stoves, heating furnaces, and soaking pits.
- Glass Industry: Insulation layers for tank walls, breast walls, and other critical sections of glass melting furnaces.
- Industrial Kilns: Linings and insulation layers for tunnel kilns, shuttle kilns, roller kilns, and other high-temperature ceramic or glass furnaces.
- Power Plants: Thermal insulation in furnace chambers, flues, air preheaters, and other components of boilers in thermal power plants.
- Non-Ferrous Metallurgy: Reliable insulation layers in furnaces for non-ferrous metal smelting.
Our services: refractory technicians, refractory installation drawings, refractory bricks and castables, refractory masonry services, refractory mixes and precast cell, special shaped bricks, insulation materials, installation supervision, accident investigation and resolution, other customized services.
