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High Alumina Insulating Blocks from China Suppliers | Quality Factory-Made Refractory Materials
Feature & Advantage
High alumina insulating blocks are specialized refractory materials that are used in various high-temperature applications due to their unique properties. Some key features of high alumina insulating blocks include:
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1. Thermal Insulation They have low thermal conductivity, making them highly effective at reducing heat loss and maintaining high temperatures in furnaces and kilns.
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2. Mechanical Strength They exhibit good mechanical strength and resistance to abrasion, which ensures durability and longevity in harsh conditions.
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3. Lightweight Despite their strength and durability, high alumina insulating blocks are relatively lightweight, which makes them easier to handle and install.
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4. Dimensional Stability They maintain their shape and structural integrity under high-temperature conditions, minimizing deformation and cracking.
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5. Energy Efficiency By providing excellent insulation, these blocks help in conserving energy and reducing operational costs in high-temperature processes.
Typical Application
"Vibration Cast Fireclay Block for Glass Furnace" is commonly used for insulation in the bottom and sidewalls of glass furnaces. These fireclay bricks not only effectively insulate, preventing the outward spread of heat and maintaining a stable high-temperature environment inside the glass furnace, but also possess high strength characteristics. Their unique vibration casting process gives these bricks uniform density and excellent refractory performance, enabling them to withstand the high temperatures and impacts generated during glass furnace operations, ensuring stability and reliability during long-term operation.
Typical Indexes
| Items | Unit | FLG-1.2 | FLG-1.0 | FLG-0.8 | FLG-0.7 | FLG-0.6 |
| Al2O3 | % | ≥ 48 | ≥ 48 | ≥ 48 | ≥ 48 | ≥ 48 |
| Fe2O3 | % | ≤ 2.0 | ≤ 2.0 | ≤ 2.0 | ≤ 2.0 | ≤ 2.0 |
| Bulk Density | g/cm3 | 1.2-1.3 | 1 | 0.8 | 0.7 | 0.6 |
| Cold Crushing Strength | MPa | 15 | 4 | 3 | 2.5 | 2 |
| Reheating Linear Change no more than 2% | % | 1400 | 1400 | 1400 | 1350 | 1350 |
| Thermal Conductivity @350 ± 10°C | W/m·K | 0.55 | 0.5 | 0.35 | 0.35 | 0.3 |
Frequently Asked Questions
What are the primary benefits of using high alumina insulating blocks?
High alumina insulating blocks offer excellent thermal insulation, high mechanical strength, lightweight structure for easy installation, outstanding dimensional stability under extreme heat, and improved energy efficiency.
Where are vibration cast fireclay blocks typically applied?
These blocks are commonly used for thermal insulation in the bottom and sidewalls of glass furnaces to maintain a stable high-temperature environment.
What is the Al2O3 percentage in the FLG series?
All models in the FLG series (FLG-1.2 to FLG-0.6) feature an Al2O3 content of ≥ 48%.
How does the vibration casting process improve block performance?
The vibration casting process provides the fireclay blocks with a highly uniform density and superior refractory performance, allowing them to withstand heavy impacts and high operational temperatures.
What is the thermal conductivity range of these insulating blocks?
At 350 ± 10°C, the thermal conductivity ranges from 0.3 W/m·K (for FLG-0.6) up to 0.55 W/m·K (for FLG-1.2), providing tailored insulation capacities.