High alumina insulating refractory bricks
Classification:
Product Introduction
High alumina heat-insulating refractory bricks are heat-insulating refractory products made of bauxite as the main raw material with an Al2O3 content of not less than 48%. The production process adopts the foam method, and the burnout method can also be used.
The Chinese standard (GB3995-2014) divides high-alumina thermal insulation refractory bricks into six grades according to the bulk density: LG140-1.2, LG140-1.0, LG140-0.8L, LG135-0.7L, LG135-0.6L and LG125-0.5.
High-alumina insulating refractory bricks can be used for masonry insulation and parts without strong erosion and erosion of high-temperature molten materials. In direct contact with the flame, the surface contact temperature of the general high-alumina insulated refractory bricks must not be higher than 1350°C. Mullite heat-insulating refractory bricks can be in direct contact with the flame, and have the characteristics of high temperature resistance, high strength and remarkable energy-saving effect. It is suitable for the lining of pyrolysis furnaces, hot blast furnaces, ceramic roller kilns, electric porcelain drawer kilns and various resistance furnaces.
| Projects | Physical and chemical indicators | ||||||
LG140- 1.2 | LG140- 1.0 | LG140- 0.8L | LG135- 0.7L | LG135- 0.6L | LG125- 0.5L | ||
| （Al2O3）/% | ≥ | 48 | |||||
| （Fe2O3）/% | ≤ | 2.0 | |||||
| Bulk density/(g/cm3) | ≤ | 1.2 | 1.0 | 0.8 | 0.7 | 0.6 | 0.5 |
| Compressive strength at room temperature/Mpa | ≥ | 4.5 | 3.5 | 2.5 | 2.2 | 1.6 | 1.2 |
| Heating permanent line change/%(T/°C×12h) | Test temperature T/°C | 1400 | 1350 | 1250 | |||
| Xmin~Xmax | -0.2~1.0 | ||||||
| Thermal conductivity/[W/m.K] ≤ average temperature (350±25)°C | 0.55 | 0.50 | 0.35 | 0.30 | 0.25 | 0.20 | |
Key words:
High alumina insulating refractory bricks
High-alumina insulating bricks
Related Products
Product inquiry