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High Alumina Insulating Blocks for Industrial Furnace - China Suppliers & Factory Quality Products
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 to minimize heat loss, high mechanical strength and abrasion resistance, lightweight properties for easy handling, strong dimensional stability under heat, and enhanced energy efficiency.
Where are vibration cast fireclay blocks typically applied in glass furnaces?
These blocks are commonly used for insulation in the bottom and sidewalls of glass furnaces. They help maintain a stable, high-temperature environment by preventing outward heat spread.
What is the typical chemical composition of the FLG series blocks?
According to the typical indexes, all models from FLG-1.2 to FLG-0.6 feature an Al2O3 content of ≥ 48% and a Fe2O3 content of ≤ 2.0%.
Why is the vibration casting process beneficial for furnace blocks?
The unique vibration casting process ensures that the fireclay blocks have uniform density and excellent refractory performance, allowing them to withstand extreme temperatures and physical impacts during operations.
How does the thermal conductivity of these blocks vary by model?
At 350 ± 10°C, the thermal conductivity ranges from 0.55 W/m·K for the denser FLG-1.2 model down to 0.3 W/m·K for the highly insulating FLG-0.6 model.