Skip to content 
Lightweight fire clay insulation brick
- Al2O3≥: 20%~45%
- Refractory temperature (℃): 1200~1350℃
- Bulk Density (g/cm³): 0.6-1.3
- Cold Crushing Strength(MPa)≥: 2-4
- Standard Size: 230*114*65mm
- Certification: ISO9001/ISO14001/ISO45001/ISO50001
- Samples: Provide you free samples for testing
Explore Lightweight fire clay insulation brick
Lightweight fire clay insulation brick are widely used in the insulation layer of various high-temperature kilns, such as heating furnaces, soaking furnaces, heat treatment furnaces, blast furnaces, hot blast furnaces, coke ovens, tunnel kilns and flues. These bricks can withstand the erosion and scouring of non-strong high-temperature molten materials, and are often used on surfaces that are in direct contact with flames to reduce erosion by slag and scouring by furnace gas and dust, thereby reducing damage.
Why choose Jianhong Refractory?
If you’re in search of the finest Fire Clay 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 Fire Clay 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 fire clay insulation brick
Are you in the market for Fire Clay Insulation Brick ? Look no further.
This all-inclusive buyer’s guide provides you with crucial insights into Fire Clay 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 clayfire insulation brick?
Lightweight fire clay insulation bricks are crafted from high-grade fire clay, with alumina content ranging from 35% to 48%. These bricks are produced through a precise process: crushed blended clay and refined clinker are finely ground and mixed, then combined with granular clinker to form a semi-dry mixture. This mixture is shaped under high pressure and fired at temperatures between 1200°C and 1400°C, resulting in a durable, thermally efficient insulation material ideal for industrial furnace linings.
Chapter 2
Features of fire clay insulation brick
Low Thermal Conductivity
With thermal conductivity ranging from 0.23 to 0.65 W/(m·K), these bricks significantly outperform standard fire bricks in minimizing heat transfer, contributing to superior thermal insulation.High Porosity
Featuring a porosity level between 40% and 70%, the bricks trap air effectively, enhancing their insulating capabilities and supporting energy-saving operations.Excellent Thermal Shock Resistance
With a permanent linear change of just -2% to +1%, the bricks maintain structural integrity even under extreme temperature fluctuations—ideal for demanding thermal environments.Outstanding Insulation Efficiency
The combination of low thermal conductivity and high porosity delivers reliable thermal insulation performance, helping industrial systems achieve greater energy efficiency.Lightweight Structure
With a bulk density of 0.5 to 1.5 g/cm³, these insulation bricks reduce the overall weight of thermal structures, minimizing load stress and allowing for more efficient furnace design.
Chapter 3
Specifications of Our fire clay insulation brick
| INDEX | JH-0.6 | JH-0.8 | JH-1.0 | JH-1.2 |
|---|---|---|---|---|
| Bulk Density(g/cm3) ≥ | 0.6 | 0.8 | 1 | 1.2 |
| Cold Crushing Strength(MPa) ≥ | 2 | 3 | 3.5 | 5 |
| Permanent Linear Change℃×12h ≤2% | 900 | 900 | 900 | 1000 |
| Thermal Conductivity350±25℃ (W/m.k) | 0.25 | 0.35 | 0.4 | 0.5 |
| Al2O3(%) ≥ | 35 | 35 | 35 | 35 |
| Fe2O3(%) ≤ | 2 | 2 | 2 | 2 |
Chapter 4
Application of fire clay insulation brick
Lightweight fire clay insulation brick are widely used in the insulation layer of various high-temperature kilns, such as heating furnaces, soaking furnaces, heat treatment furnaces, blast furnaces, hot blast furnaces, coke ovens, tunnel kilns and flues. These bricks can withstand the erosion and scouring of non-strong high-temperature molten materials, and are often used on surfaces that are in direct contact with flames to reduce erosion by slag and scouring by furnace gas and dust, thereby reducing damage.
Metallurgical Industry
In the high-temperature world of the metallurgical industry, every blast furnace is a vortex of energy. Hot blast stoves roar with thousand-degree heat around the clock, while ladles endure the relentless assault of molten metal. Traditional dense refractory bricks—heavy and energy-intensive—have become bottlenecks to efficiency. Lightweight fire clay insulation bricks, with their triple advantage of lightweight structure, high refractoriness, and superior energy efficiency, are redefining the standard for thermal insulation in metallurgy.
Ceramic Industry
During the critical "golden 8 hours" of ceramic firing, every detail—from the heating rate of shuttle kilns to temperature uniformity in roller kilns, and the glaze finish yield—directly impacts product value. Traditional insulation bricks, with their sensitivity to thermal shock and low mechanical strength, are becoming obstacles to quality and efficiency upgrades in ceramic manufacturing. Lightweight fire clay insulation bricks, with core advantages of thermal shock resistance, rapid heating, and extended service life, have become the standard choice for high-end ceramic production.
Glass Industry
Over a glass melting furnace's decade-long operating cycle, the performance of refractory materials—particularly their resistance to corrosion, thermal stability, and insulation efficiency—directly impacts the purity of molten glass and overall production costs. Traditional insulation bricks, prone to rapid erosion and high thermal conductivity, have become a limiting factor in cost reduction and efficiency. Lightweight fire clay insulation bricks, with their resistance to molten glass corrosion, low heat capacity, and extended lifespan, are redefining thermal insulation solutions for glass melting furnaces.
Petrochemical Industry
Across every stage of energy production and utilization—from the intense heat of thermal power boilers to distributed photovoltaic systems in modern architecture—efficient energy capture and low-loss transmission remain critical goals. Traditional insulation materials, with high thermal conductivity, poor durability, and environmental concerns, are hindering breakthroughs in system performance. Lightweight fire clay insulation bricks, offering lightweight efficiency, wide temperature adaptability, and sustainable use of industrial by-products, have emerged as the ideal partner for energy sector upgrades.
Chapter 5
Quality Assurance for fire clay insulation brick
At Henan Jianhong Refractory Materials Co., Ltd., we are committed to delivering premium-grade fire clay 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 fire clay 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.
