High Temperature High Alumina Insulation Brick – Lightweight, Energy-Efficient Solution for Industrial Furnaces
Product Overview:
Our Light Weight High Alumina Insulation Brick (also known as high-alumina heat insulating brick) is an essential energy-saving refractory material designed for heat preservation and insulation in various industrial kilns and furnaces. With an alumina oxide (Al₂O₃) content of over 48% and a refractoriness up to 1770°C (working temperature up to 1550°C), it offers superior insulation, low thermal conductivity, and high mechanical strength. Featuring high porosity and low bulk density, it effectively reduces furnace load, minimizes heat loss, and significantly lowers fuel consumption and operational costs.
Technical data
| Item |
LG-1.2 |
LG-1.0 |
LG-0.8 |
LG-0.7 |
LG-0.6 |
LG-0.5 |
| Al2O3 % |
≥48 |
≥48 |
≥48 |
≥48 |
≥48 |
≥48 |
| Fe2O3 % |
≤2 |
≤2 |
≤2 |
≤2 |
≤2 |
≤2 |
| Bulk Density g/cm3 |
≤1.2 |
≤1.0 |
≤0.8 |
≤0.7 |
≤0.6 |
≤0.5 |
| Permanent Linear Change Rate,% |
1400°C×12h ≤2 |
1400°C×12h ≤2 |
1400°C×12h ≤2 |
1350°C×12h ≤2 |
1350°C×12h ≤2 |
1250°C×12h≤2 |
Key Features & Advantages:
- High Refractoriness: Can withstand temperatures of 1650-1800°C, suitable for various atmospheres.
- Excellent Insulation: Low thermal conductivity and high porosity ensure outstanding heat preservation.
- Lightweight & Strong: Low volume density reduces structural load while maintaining high compressive strength.
- Superior Stability: Good thermal shock resistance, chemical stability, and strong resistance to corrosive gases and slag.
- Energy Efficient: Fundamentally reduces heat loss, leading to direct fuel savings.
- Cost-Effective: A lower-price refractory option that reduces both construction and long-term operational costs.
Physical & Chemical Performance Index (LG Series):
The table below details the precise specifications for each grade of our High Alumina Poly Light Insulation Brick series to facilitate your selection.
Primary Applications:
Our High Alumina Insulation Bricks are ideally used in parts not exposed to direct abrasion or high-temperature melted matters, and in environments not exceeding 1350°C. Typical applications include:
- Furnace Lining and Insulation Layers
- Ceramic Tunnel Kilns, Roller Kilns, Shuttle Kilns
- Heating Furnaces & Coking Furnaces in the Iron and Steel Industry
- Various Thermal Equipment & Heat Treatment Linings
Why Choose Our High Alumina Insulation Bricks?
- Reduces Kiln Load: Bulk density ranges from 0.4 to 1.35 g/cm³, with high porosity (66% to 73%), significantly alleviating the load on supporting structures.
- Superior Insulation: The body contains numerous fine, closed pores that significantly impede heat transfer, providing fundamental thermal insulation.
- Wide Temperature Coverage: Maximum operating temperature from 1350°C to 1550°C, covering most industrial furnace needs.
- Significant Energy Saving: Substantially reduces furnace body heat loss, directly lowering fuel consumption.
