Alumina hollow ball is a new type of high temperature heat insulation material, it is made of industrial alumina in the electric furnace smelting blowing, crystal type a-Al2O3 micro crystal.
Alumina hollow ball with temperature up to 1750 degrees or more, good thermal stability. Alumina hollow spherical brick bulk density only 1.1~1.5g/cm weight burn line change rate is small, the use of more long-term.
| Brand Properties | LG-99 | LG-90 | LG-85 | |
| Al2O3 | ≥99 | ≥90 | ≥85 | |
| Chemical Analysis(%) | SiO2 | ≤0.3 | ≤7 | ≤13 |
| Fe2O3 | ≤0.1 | ≤0.1 | ≤0.2 | |
| Bulk Density (g/cm3) | 1.45~1.7 | 1.45~1.7 | 1.45~1.7 | |
| Cold Crushing Strength (MPa) | ≥8 | ≥10 | ≥12 | |
| Permanent Linear Change (%) @ 1600℃ | ±0.2 | ±0.2 | ±0.3 | |
| Thermal conductivity (W/m.k) @ 800℃ | ≤1.4 | ≤1.4 | ≤1.4 | |
| Maximum Service Temperature (℃) | ≥1800 | ≥1700 | ≥1600 | |
| Main Applications | Reheating Furnace | |||
| Blast Furnace | ||||
| Petrochemical Furnace | ||||
| General Industrial Furnace etc. | ||||
