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.
Advantages: Long-term working in 1800℃ environment, low bulk density, low thermal conductivity (0.2~0.5 W/(m·K)), high strength, good thermal shock resistance, chemical resistance.
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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
insulation and working layers in the blast furnace hot blast stoves, heating furnaces, soaking pits, etc.
insulation layer of the tank wall, breast wall, and other sections of glass melting furnaces.
linings and insulation layers in the kilns of tunnel kilns, shuttle kilns, roller kilns, and other glass furnaces.
thermal insulation in the furnace chambers, flues, air preheaters, and other parts of boilers in thermal power plants.
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.
