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High Alumina Insulating Blocks from China Suppliers - Factory Direct Refractory Materials for Industrial Furnaces
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 features of high alumina insulating blocks?
High alumina insulating blocks feature excellent thermal insulation (low thermal conductivity), good mechanical strength and abrasion resistance, lightweight structure for easy installation, dimensional stability under high temperatures, and high energy efficiency.
Where are Vibration Cast Fireclay Blocks typically applied?
They are commonly used for insulation in the bottom and sidewalls of glass furnaces. They prevent outward heat spread, maintain a stable internal temperature, and withstand high operating impacts.
What is the Al2O3 percentage in these insulating blocks?
Across all the standard models (FLG-1.2 to FLG-0.6), the Al2O3 content is consistently greater than or equal to 48%.
How does the thermal conductivity vary among the FLG models?
At 350 ± 10°C, the thermal conductivity ranges from 0.55 W/m·K for FLG-1.2 down to 0.3 W/m·K for FLG-0.6, providing options for different insulation needs.
Why does the vibration casting process benefit glass furnace operations?
The vibration casting process provides the blocks with a uniform density and excellent refractory performance, allowing them to resist the high temperatures and physical impacts generated during continuous glass furnace operations.