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High Alumina Insulation Brick
- Al2O3≥: 48%
- Refractory temperature (℃): 1250~1650℃
- Bulk Density (g/cm³): 0.6-1.2
- Cold Crushing Strength(MPa)≥: 1.2-4.5
- Standard Size: 230*114*65mm
- Certification: ISO9001/ISO14001/ISO45001/ISO50001
- Samples: Provide you free samples for testing
Explore High Alumina Insulation Brick
Optimize thermal efficiency with High Alumina Insulation Brick in customizable sizes and shapes, volume density ranging from 0.6 to 1.2 g/cm³, and use temperatures up to 1600℃. Ideal for kilns, steel plants, and ceramic furnaces, these bricks deliver superior insulation, reducing energy costs and structural load. At Henan Jianhong Refractory Materials Co., Ltd., we offer a comprehensive range of insulation bricks designed to meet the varied demands of industrial furnaces, kilns, and metallurgical plants around the world.
High Alumina Insulation Brick standard size
- Specifications: 230×114×65mm (standard size)
- Advantages: mass production, uniform precision, easy installation
- Applications: conventional thermal insulation scenarios such as metallurgical kilns and ceramic roller kilns
- Certification: in accordance with GB/T 3003-2020, suitable for 90% of industrial conditions
Special sizes can be customized
- Customization: arc/trapezoidal/perforated bricks according to drawings, error ≤ 0.3mm
- Efficiency: Accurately fit the kiln surface and complex working conditions, improving insulation efficiency by 20%
- Applications: high temperature furnace bends, special-shaped interfaces of chemical pipelines, special insulation layers of environmental protection equipment
High Alumina Insulation Brick Bulk Density
- Bluk density: 0.8~1.2g/cm³
- Advantages: Weight reduction of 50%+, construction efficiency improvement of 30%, energy saving rate of 40%
- Applications: Reduce kiln weight, enhance insulation, and lower fuel consumption, making them a preferred energy-saving choice.
Customized high alumina insulation brick
- Selection on demand: From low-temperature energy saving to high-temperature strong corrosion resistance, full grade coverage, JIAN HONG Refractory provides you with working condition matching solutions free of charge!
Why choose Jianhong Refractory?
If you’re in search of the finest High Alumina Insulation Brick for optimal solutions to serve your clients, look no further than Jian Hong Refractory. Our meticulous practices ensure the delivery of top-tier High Alumina Insulation Brick.
Low MOQ
Jian Hong Refractory offers flexible production, accommodating orders from 1 to 10,0000 units on demand.
Fast delivery
Our mature production line facilitates 24/7 operations, enabling rapid turnaround and prompt delivery.
Competitive Price
We guarantee the most competitive prices while maintaining the highest quality standards compared to other suppliers.
Expert Production
Equipped with three modern production lines, our facilities ensure consistent quality and timely delivery, setting us apart from others in the industry.
Satisfaction Assurance
With a focus on refractory product quality and clear communication, we ensure that every step is streamlined for the ease and satisfaction of our clients.
Comprehensive Product Range
Beyond high alumina bricks, our portfolio includes castables, insulation bricks, ceramic fiber products, and refractory raw materials, providing a one-stop solution unlike competitors with limited ranges.
1 Refractory Raw Materials
2 Crushing and Grinding
3 Screening and Mixing
4 Formulation and Batching
5 Molding and Shaping
6 Drying
7 Pre-Firing Inspection
8 Firing in Kiln
9 Firing Completed
10 Final Quality Inspection
11 Packaging
12 Transport and Delivery
The Ultimate Buyer’s Guide: How to Purchase High Alumina Insulation Brick
Are you in the market for High Alumina Insulation Brick ? Look no further.
This all-inclusive buyer’s guide provides you with crucial insights into High Alumina Insulation Brick, which find applications in metallurgical industry, power industry, ceramic industry, chemical industry and other heat treatment high temperature industries. Whether you’re contemplating importing them for your projects or planning local distribution, this guide furnishes invaluable information to guide your decision-making process.
Table of contents
Chapter 1
What is High Alumina Insulation Brick?
High alumina insulation bricks (also known as high alumina polylight bricks) are made of high-alumina bauxite clinker as the main raw material and are made using the polylight burning loss process. The alumina content is ≥48%. The unique porous spherical structure gives it the characteristics of light weight, high strength and low thermal conductivity. The refractory temperature reaches 1600℃, and the long-term use temperature is ≤1350℃. It can directly contact the flame and is widely used in the insulation layer and lining of high-temperature equipment in the metallurgical, ceramic, chemical and other industries.
Chapter 2
Features of High Alumina Insulation Brick
High Refractoriness: With a refractoriness range of 1580–1750°C, these High Alumina Insulation Brick outperform most other insulating materials in extreme heat conditions.
Excellent Thermal Insulation: Featuring a low thermal conductivity of 0.2–0.55 W/(m·K), they provide superior energy efficiency compared to clay and silica bricks.
Lightweight Design: With a bulk density of 0.5–1.2 g/cm³, these lightweight refractory bricks are easy to install and reduce structural load, enhancing overall construction quality.
Good Mechanical Strength: A compressive strength of 1.0–2.0 MPa ensures durability and long service life under high-temperature mechanical stress.
Strong Chemical Stability: High alumina content gives excellent resistance to acidic and alkaline corrosion, extending service life in chemically aggressive environments.
Chapter 3
Specifications of Our High Alumina Insulation Brick
| Item | Specification | |||||
|---|---|---|---|---|---|---|
| LG-1.2 | LG-1.0 | LG-0.8 | LG-0.7 | LG-0.6 | LG-0.5 | |
| Al2O3 % | ≥48 | |||||
| Fe2O3 % | ≤2 | |||||
| Bulk Density, g/cm3 | ≤1.2 | ≤1.0 | ≤0.8 | ≤0.7 | ≤0.6 | ≤0.5 |
| CCS, MPa | ≥4.5 | ≥3.5 | ≥2.5 | ≥2.2 | ≥1.6 | ≥1.2 |
| PLC, % | 1400℃×12h ≤-2 | 1350℃×12h ≤-2 | 1250℃×12h ≤-2 | |||
| Thermal Conductivity, W/(m·K) 350±25℃ | ≤0.55 | ≤0.50 | ≤0.35 | ≤0.30 | ≤0.25 | ≤0.20 |
Chapter 4
Application of High Alumina Insulation Brick
In the metallurgical, ceramic, chemical, building materials and other industries, high-temperature equipment faces problems such as high energy consumption, large heat dissipation loss, and short equipment life. High alumina insulation bricks provide targeted solutions for various industries with their light weight, high strength, low thermal conductivity, and high temperature resistance:
Metallurgical Industry
In the metallurgical industry, equipment such as blast furnace hot stoves and electric arc furnaces must operate reliably at sustained high temperatures between 1200–1350°C. However, traditional refractory bricks often suffer from high thermal losses, leading to excessive energy consumption. In contrast, high alumina insulation bricks offer a breakthrough solution. With a low bulk density of just 0.6–1.2 g/cm³, they are over 60% lighter than conventional bricks—greatly reducing the mechanical load on furnace structures. Their thermal conductivity is as low as ≤0.5 W/(m·K) at 1350°C, which can lower the furnace shell temperature by 50–80°C. This substantial drop translates directly into energy savings and reduced operational costs, making high alumina insulation bricks an energy-efficient, cost-effective, and industry-preferred choice for high-temperature applications.
Ceramic Industry
High alumina insulation bricks are made from top-grade bauxite using a special lightweight process. They contain ≥48% alumina, weigh less (0.6–1.2 g/cm³), yet are strong (2–10 MPa). This makes them light but tough—ideal for high-heat areas in tunnel and roller kilns. Their low thermal conductivity (≤0.5 W/m·K) helps cut kiln surface temperature by 30–50°C and reduces heat loss by over 30%. In one case, using these bricks in a roller kiln saved 15% energy, raised output by 12.5%, and improved product quality to over 95%.
Glass Industry
High-alumina insulation bricks are made from top-grade bauxite with a lightweight process. They contain ≥48% alumina, are light (0.6–1.2 g/cm³), but strong (2–10 MPa). They stay stable at 1350°C, resist up to 1600°C, and work well in glass furnaces. Their low thermal conductivity (≤0.5 W/m·K) helps lower kiln surface temperatures by 30–50°C and cuts heat loss by over 30%. One glass plant cut energy use by 18%, raised efficiency by 15%, and improved temperature control by 20%. With over 90% closed pores, these bricks block slag and oxidation. Used on kiln ceilings, they extend life from 6 to over 10 years and reduce repair costs by 40%. Special groove designs help absorb heat shock. In one upgrade, they replaced clay bricks, cutting temperature swings and reducing glass defects by 70%.
Petrochemical Industry
High-alumina insulation bricks are made from special bauxite using a poly-light burn-off process. They contain ≥48% alumina, are light (0.6–1.2 g/cm³), yet strong (2–10 MPa). Their mullite-corundum structure stays stable at 1350℃, with a refractory temperature of 1600℃ and a softening point ≥1400℃—ideal for long-term use in harsh petrochemical environments. With thermal conductivity ≤0.5 W/(m·K), they reduce equipment surface temperatures by 30–50℃ and cut heat loss by over 30%. In a catalytic cracking unit, these bricks lowered energy use by 18%, boosted thermal efficiency by 15%, and extended catalyst life from 8 to 12 years—saving RMB 4.8 million annually.
Chapter 5
Quality Assurance for High Alumina Insulation Brick
At Henan Jianhong Refractory Materials Co., Ltd., we are committed to delivering premium-grade High Alumina Insulation Brick that meet the highest industry standards. Our quality assurance process is designed to ensure each product offers consistent performance, long service life, and maximum thermal efficiency.
The key quality tests typically include:
| Test items | Test Description | Testing standards |
|---|---|---|
| Bulk Density (BD) | Measures the compactness of the brick. High density often correlates with better strength and durability. | ASTM C133 |
| Apparent Porosity (AP) | Indicates the brick's ability to resist slag and gas penetration. Lower porosity is preferred for corrosive environments. | ASTM C20 |
| Cold Crushing Strength (CCS) | Indicates the brick's ability to resist slag and gas penetration. Lower porosity is preferred for corrosive environments. | ASTM C133 |
| Refractoriness (RUL & PCE) | RUL (Refractoriness Under Load): Measures the temperature at which the brick deforms under load. | ASTM C24 |
| PCE (Pyrometric Cone Equivalent): Indicates the maximum temperature the brick can withstand without melting. | ||
| Thermal Shock Resistance | Evaluates the ability to withstand rapid temperature changes without cracking. | ASTM C1171 |
| Thermal Conductivity | Assess insulation performance — lower conductivity is ideal for insulating bricks, while higher values suit heat-transfer zones. | ASTM C1171 |
| Chemical Composition Test | Check the amounts of key ingredients like aluminum oxide (Al₂O₃), silicon dioxide (SiO₂), and magnesium oxide (MgO) to make sure they meet the required levels for the intended use. | ISO 12677 |
| Slag Resistance/Erosion Resistance | Evaluate the resistance to slag or chemical media. | ASTM C24 |
| Reburn line Change Rate | Volume stability after high temperature heating. | ASTM C38 |
| Dimension Inspection | Measure the length, width, and thickness of the bricks to make sure the size error is within ±1mm. This ensures the bricks match customer requirements and fit accurately during installation. | ISO 5019-1 |
| Surface Appearance Tests | Surface cracks.Edge chipping.Consistency in color and finish. | ISO 5019-1 |
| Packaging Tests | Packaging is inspected for export compliance and damage protection |
Through this meticulous testing process, we ensure that our refractory bricks meet the highest standards of quality, reliability, and performance, making them ideal for various applications in various industries.
Chapter 6
Chapter 7
In Summary
When it comes to High Alumina Insulation Brick, Henan Jianhong Refractory Materials Co., Ltd. stands as your trusted partner in delivering exceptional quality, reliability, and performance. With over two decades of expertise, we specialize in manufacturing premium refractory products engineered to withstand extreme temperatures and harsh industrial conditions. Our commitment to precision, stringent quality control, and comprehensive customization ensures that every brick we produce meets the highest industry standards.
Partner with us and experience the advantages of working with a dedicated supplier known for superior product consistency, timely delivery, and unwavering customer support. From steel plants to cement kilns, our high-alumina bricks are designed to maximize your operational efficiency and protect your high-temperature systems effectively.
Ready to enhance your industrial operations? Connect with Henan Jianhong Refractory Materials Co., Ltd. today and let us be your trusted source for reliable, high-performance refractory solutions.
