High Alumina Anchor Bricks for Furnace Roofs are specially designed refractory bricks used to provide mechanical anchoring and structural support for refractory linings installed in high-temperature furnace roofs and ceilings. Manufactured from alumina-rich refractory raw materials, these bricks combine high mechanical strength, good thermal stability, and resistance to high-temperature operating conditions.
The specialized anchor-brick structure helps connect the refractory roof lining with the supporting furnace structure, improving the overall stability of the roof and reducing the risk of refractory displacement, cracking, peeling, or falling during long-term operation. Their high load softening temperature and good resistance to thermal cycling make them suitable for demanding industrial furnace environments.
Compared with ordinary refractory bricks, furnace roof anchor bricks are designed with the specific requirements of overhead refractory structures in mind. They help maintain the position of refractory materials under gravity, thermal expansion, vibration, and repeated heating and cooling cycles.
At Xintai Refractory, High Alumina Anchor Bricks for Furnace Roofs can be supplied in different grades, shapes, and dimensions according to furnace construction requirements. Standard sizes are available, while customized anchor bricks can be manufactured according to customer drawings and furnace roof designs.
Technical Specifications
| Project | LZ-55A | LZ-55B | LM-75A | LM-75B |
|---|---|---|---|---|
| Al₂O₃ % ≥ | 55.0 | 55.0 | 75.0 | 75.0 |
| CaO % ≤ | 2.0 | 2.0 | 2.0 | 2.0 |
| Normal Temperature Compressive Strength MPa ≥ | 50 | 50 | 55 | 55 |
| Load Softening Starting Temperature ℃ ≥ | 1450 | 1450 | 1550 | 1550 |
| Apparent Porosity % ≤ | 22 | 24 | 21 | 23 |
| Bulk Density g/cm³ | 2.30 | 2.30 | 2.60 | 2.60 |
Key Features
- High Mechanical Strength: Cold crushing strength of 50–55 MPa provides reliable mechanical support for refractory furnace roof structures.
- High Load Softening Temperature: Load softening starting temperatures of 1450–1550°C help the anchor bricks maintain structural stability under elevated temperatures.
- Good Thermal Shock Resistance: Designed to withstand repeated heating and cooling cycles, helping reduce the risk of thermal cracking and structural damage.
- Reliable Roof Anchoring: The specialized anchor-brick configuration helps secure refractory linings and improve the stability of overhead furnace structures.
- Excellent Resistance to Refractory Displacement: Helps minimize movement, peeling, and falling of roof refractory materials caused by thermal expansion, vibration, and gravity.
- Good Corrosion Resistance: Suitable for furnace atmospheres containing hot gases, dust, and other corrosive substances.
- Multiple Grade Options: LZ-55A, LZ-55B, LM-75A, and LM-75B provide different alumina contents and physical properties for different furnace operating conditions.
- Dimensional Customization: Shapes, dimensions, and configurations can be customized according to furnace roof design, anchoring requirements, and installation conditions.
- Stable High-Temperature Performance: Alumina-rich composition provides dependable performance in high-temperature industrial furnace applications.
Typical Applications
High Alumina Anchor Bricks for Furnace Roofs are used in high-temperature industrial equipment where the refractory roof or ceiling requires additional mechanical support and anchoring.
Typical applications include:
- Industrial furnace roofs
- Industrial furnace ceilings
- Electric furnace roofs
- Blast furnace roof structures
- Hot blast furnace components
- Rotary kiln roof and high-temperature sections
- Reverberatory furnace roofs
- Regenerative heating furnaces
- Heat treatment furnace roofs
- Metallurgical furnace structures
- High-temperature kiln roofs
- Other industrial furnace and kiln structures
These refractory anchor bricks are particularly suitable for overhead refractory linings exposed to high temperatures, thermal cycling, mechanical vibration, and continuous operating loads. Their anchoring function helps improve the integrity and service stability of the refractory roof system.
Production Details
Xintai High Alumina Anchor Bricks for Furnace Roofs are manufactured using carefully selected alumina-rich refractory raw materials. The production process includes raw material preparation, precise batching, mixing, molding, drying, and high-temperature firing.
The raw materials are processed according to the requirements of each grade to achieve consistent chemical composition and physical properties. During molding, the anchor-brick shape and dimensions are carefully controlled to ensure proper fitting with the furnace roof structure and refractory lining system.
The drying and firing processes are strictly controlled to develop the required refractory structure, mechanical strength, and high-temperature performance. Quality inspections are carried out throughout production to help maintain dimensional accuracy, bulk density, apparent porosity, compressive strength, and load softening performance.
Different grades, shapes, and dimensions can be produced according to customer drawings and furnace construction requirements. Customized anchor bricks are available for special furnace roof configurations and installation conditions.
Packing and Shipping Details
- Packaging: Packed on strong wooden pallets with protective wrapping
- Shipping Time: 7–15 working days after order confirmation
- Storage: Store in a dry and well-ventilated area to prevent moisture absorption
- Customization: Shapes, dimensions, and grades can be customized according to customer requirements
- Inspection: Products are inspected before shipment to ensure compliance with specified technical requirements
Frequently Asked Questions (FAQ)
Q1: What are High Alumina Anchor Bricks for Furnace Roofs?
High Alumina Anchor Bricks for Furnace Roofs are specially shaped refractory bricks used to anchor, support, and stabilize refractory linings in furnace roofs and ceilings. They are designed to withstand high temperatures and mechanical loads in industrial furnace environments.
Q2: What alumina content is available?
Xintai supplies grades with Al₂O₃ contents ranging from 55% to 75%. The available grades include LZ-55A, LZ-55B, LM-75A, and LM-75B.
Q3. What is the maximum service temperature?
The maximum service temperature is up to 1600°C, depending on the specific grade, furnace conditions, and installation environment.
Q4: Can the anchor bricks be customized?
Yes. Xintai can manufacture customized anchor bricks according to customer drawings, furnace roof dimensions, anchoring structures, and installation requirements.
Q5: What is the standard size?
The standard size is 230×114×65 mm. Other shapes and dimensions can be customized according to the furnace design.
Q6: Where are furnace roof anchor bricks used?
They are commonly used in industrial furnaces, electric furnaces, blast furnaces, hot blast furnaces, rotary kilns, reverberatory furnaces, heat treatment furnaces, regenerative furnaces, and other high-temperature equipment requiring stable refractory roof support.
