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High Alumina Insulating Blocks from China Suppliers - Premium Quality Factory Products 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.
1
Thermal Insulation: Low thermal conductivity reduces heat loss and maintains stable furnace temperatures.
2
Mechanical Strength: Excellent resistance to abrasion ensures long-term durability in harsh conditions.
3
Lightweight: Easier to handle and install compared to heavy refractory alternatives.
4
Dimensional Stability: Maintains structural integrity under extreme heat without deformation.
5
Energy Efficiency: Superior insulation significantly lowers operational energy costs.
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 (≤ 2%) | °C | 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?
The main benefits include excellent thermal insulation, high mechanical strength, lightweight handling, dimensional stability under heat, and significant energy savings.
Where are vibration cast fireclay blocks typically applied?
They are primarily used in the bottom and sidewalls of glass furnaces to provide heat insulation and structural stability.
What is the Al2O3 content in these insulating blocks?
The high alumina insulating blocks maintain a high Al2O3 content of ≥ 48% across all standard models (FLG series).
How does the bulk density vary between different FLG models?
Bulk density ranges from 0.6 g/cm³ (FLG-0.6) up to 1.3 g/cm³ (FLG-1.2), allowing for specific selection based on insulation and strength requirements.
What is the maximum reheating temperature for these blocks?
Depending on the model, these blocks can withstand reheating temperatures between 1350°C and 1400°C with a linear change of no more than 2%.
Are these blocks resistant to abrasion?
Yes, they exhibit good mechanical strength and resistance to abrasion, ensuring a long service life even in demanding industrial environments.