High Alumina Insulating Brick used for insulation layers of glass kilns, metallurgical reheating furnaces, ceramic roller kilns, chemical reactors, and for heat insulation in power station boilers and waste incineration plants.
High Alumina Insulating Bricks are produced by the light - aggregate burnout method, mainly using high alumina bauxite clinker as the main raw material. Their main components are mullite, corundum, and the glassy phase. They are suitable for the thermal - insulation layers of high - temperature industrial equipment.
Features and Properties
| Index Items | ZKLG140 - 1.2 | ZKLG140 - 1.0 | ZKLG140 - 0.8 | ZKLG140 - 0.6 | |
| Al₂O₃ /% ≥ | 48 | 48 | 48 | 48 | |
| Fe₂O₃ /% ≤ | 2.0 | 2.0 | 2.0 | 2.0 | |
| Bulk Density /g/cm³ ≤ | 1.2 | 1.0 | 0.8 | 0.6 | |
| High-temperature Compressive Strength /MPa ≥ | 8 | 3.0 | 2.5 | 1.5 | |
| Permanent Linear Change after Heating /% | Test Temperature T / °C | 1400 °C × 12h | 1400 °C × 12h | 1400 °C × 12h | 1350 °C × 12h |
| Xmin ~ Xmax | -2 ~ +1 | -2 ~ +1 | -2 ~ +1 | -2 ~ +1 | |
| Thermal Conductivity /W/(m·K) at an Average Temperature of 350 ± 25 °C | 0.50 | 0.40 | 0.35 | 0.25 | |
SiO₂:91%;
Bulk Density:0.8-1.2g/cm³;
Thermal Conductivity :0.26-0.35;
Al₂O₃:90-99%;
Bulk Density:1.35-1.70g/cm³;
Cold Crushing Strength:8-20MPa;
Al₂O₃:40-70%;
Bulk Density:0.60-1.10g/cm³;
Thermal Conductivity:0.20-0.60;
Bulk Density:0.6-1.3g/cm³;
Thermal Conductivity:0.25-0.55;
Cold Crushing Strength:1.5-8MPa;
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