High Alumina Brick for Steel Reheating Furnace is designed for the high-temperature operating conditions found in steel reheating furnaces. These furnaces are used to heat steel billets, slabs, blooms, and other semi-finished steel products to the required temperature before rolling or subsequent processing. Refractory materials used in these furnaces must withstand prolonged heat exposure, temperature fluctuations, mechanical loads, and potential chemical attack from furnace atmospheres and fuel combustion products.
Xintai manufactures high alumina refractory bricks for industrial furnace applications, with product grades and dimensions selected according to furnace design, operating temperature, installation position, and service requirements. High alumina bricks offer good refractoriness, mechanical strength, and resistance to thermal and chemical stresses when properly matched to the operating environment.
For steel reheating furnace projects, the appropriate refractory grade depends on whether the bricks are installed in the furnace roof, walls, burner areas, or other structural sections. Customized sizes and material specifications can be discussed according to drawings and technical requirements.
Technical Specifications
| Item | XT-55 | XT-60 | XT-70 | XT-80 |
|---|---|---|---|---|
| Al₂O₃% (≥) | 55 | 60 | 70 | 80 |
| Fe₂O₃% (≤) | 2.0 | 2.0 | 2.0 | 2.0 |
| 0.2 MPa Refractoriness Under Load (℃) ≥ | 1450 | 1480 | 1530 | 1600 |
| Apparent Porosity (%) | 23 | 22 | 20 | 18 |
| Bulk Density (g/cm³) | 2.3 | 2.45 | 2.55 | 2.65 |
| Cold Crushing Strength (MPa) ≥ | 40 | 55 | 60 | 70 |
Key Features
High-Temperature Performance: High alumina refractory bricks are suitable for demanding furnace environments where resistance to elevated temperatures and sustained thermal exposure is essential.
Mechanical Strength: Properly selected brick grades provide the structural strength required to support refractory linings and withstand handling, installation, and service-related stresses.
Resistance to Thermal Cycling: Reheating furnaces undergo heating and cooling cycles during operation and maintenance. Selecting a suitable brick composition helps address temperature fluctuations and thermal stress.
Resistance to Furnace Atmospheres: The performance of high alumina bricks depends on the chemical composition of the furnace atmosphere, fuel combustion products, and any deposits formed during operation. Material selection should consider these factors.
Flexible Specifications: Xintai can discuss different brick grades, shapes, and dimensions to meet furnace drawings, installation requirements, and project-specific operating conditions.
Support for Industrial Furnace Maintenance: Suitable refractory brick selection can help maintain lining integrity and support reliable furnace operation. Actual service life depends on operating conditions, installation quality, and maintenance practices.
Typical Applications
Steel Billet Reheating Furnaces: Used in refractory lining systems for furnaces that heat billets before rolling.
Steel Slab Reheating Furnaces: Applied in selected furnace sections according to thermal, mechanical, and chemical requirements.
Bloom Reheating Furnaces: Suitable for evaluating as part of the refractory lining in industrial steel reheating operations.
Furnace Walls and Roofs: Used where the selected high alumina grade meets the local temperature, load, and atmosphere requirements.
Selected Burner and High-Temperature Zones: Application depends on flame exposure, temperature distribution, local thermal shock, and the compatibility of the refractory with combustion products.
The final brick grade should be selected according to the specific furnace zone rather than using one material specification throughout the entire furnace.
Production Details
High Alumina Brick for Steel Reheating Furnace is produced through a controlled refractory manufacturing process. Depending on the selected grade, the process generally includes raw material inspection, batching, mixing, pressing, drying, and high-temperature firing.
High alumina raw materials are proportioned according to the target chemical composition and physical properties. After mixing, the material is shaped using suitable forming equipment to achieve the required dimensions and density. The green bricks are then dried under controlled conditions before firing.
During firing, the refractory body develops its required ceramic structure and mechanical properties. Finished bricks undergo dimensional inspection and applicable quality checks before packaging and shipment.
For customized orders, customers can provide furnace drawings, brick dimensions, required alumina content, operating temperature, and installation location. These details help determine the appropriate product specification.
Packing and Shipping Details
Packing: High alumina bricks are packed in suitable export packaging, such as fumigated wooden crates or other agreed protective packaging. Packaging arrangements are selected to reduce movement, impact, and breakage during handling and transportation.
Shipping: Xintai can coordinate international shipments by sea, land, or air, depending on order volume, destination, delivery schedule, and customer requirements.
Customized Orders: Packaging labels, quantities per crate, and shipping arrangements can be discussed according to project requirements.
Frequently Asked Questions (FAQ)
Q1: What are high alumina bricks used for in a steel reheating furnace?
High alumina bricks are used in selected refractory lining sections of steel reheating furnaces. Depending on the grade and furnace design, they may be applied to walls, roofs, and other areas requiring suitable high-temperature resistance and mechanical strength.
Q2: How do I choose the right high alumina brick for a steel reheating furnace?
The selection should consider the maximum operating temperature, furnace atmosphere, thermal cycling, mechanical load, slag or deposit exposure, and the specific installation zone. Furnace drawings and existing refractory specifications can help determine the appropriate grade.
Q3. Can Xintai supply customized high alumina bricks?
Yes. Customized dimensions and product specifications can be discussed according to technical drawings, furnace lining designs, and project requirements. Please provide the required dimensions, quantity, and operating conditions when requesting a quotation.
Q4: Are samples available before bulk ordering?
Samples can be discussed upon request. Availability, sample dimensions, shipping arrangements, and any associated costs should be confirmed with the sales team.
