zhengzhou kerui (group) refractory co.,ltd
Provide Leading Solutions for High Temperature Kilns

Lightweight Insulating Fire Bricks

In high temperature kilns, the lightweight insulating fire bricks are crucial. Because customers need to use this brick in insulation layer which doesn’t contact fire directly. With this product, customers can improve the overall performance of kiln.

  • 30-99

    Al2O3% (≥)

  • 0.6-1.6

    Bulk Density (g/cm³)

  • 0.25-4

    Thermal Conductivity (W/m·k)

  • 1.5-4.5

    Cold Crushing Strength (MPa)


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Introduction of Lightweight Firebrick

According to different composition, Kerui provides different kinds of lightweight insulating firebrick for sale. Here we can take a comparison with these types. Additionally, the technical data is based on China Refractory Materials Standards Committee. If you have additional requirements, welcome to contact us for a customized insulating fire brick for sale!

NameHigh Alumina Insulation BrickFire Clay Insulation BrickMullite Insulation BrickAlumina Bubble BrickSilica Insulation Brick
Main Content≥48% Al2O330%-46% Al2O340%-77% Al2O390%-99% Al2O3≥91% SiO2
Bulk Density0.5-1.2g/cm³0.5-1.5g/cm³0.5-1.35g/cm³1.3-1.9g/cm³1.0-1.2g/cm³
Thermal Conductivity Coefficient0.2-0.55 W/(m·K)0.23-0.65 W/(m·K)0.18-0.56 W/(m·K)0.9-1.2 W/(m·K)0.55-0.7 W/(m·K)
Cold Crushing Strength1.0-4.5 MPa0.8-6.0 MPa0.9-3.5 MPa6-18 MPa2-5 MPa
AdvantagesGood chemical resistanceCost-effectiveHigh refractorinessHigh StrengthGood acid resistance
ApplicationsUsed in ceramic tunnel kilns, roller kilns, shuttle kilns, wall kilns, etc., as well as other parts that are not subject to strong corrosion and erosion of high-temperature molten materials.Used as the insulation layer of thermal equipment such as ignition kilns, flues, refining devices, heating devices, regeneration devices, gas furnaces and pipelines, soaking furnaces, annealing furnaces, reaction chambers, etc.Suitable for the refractory lining and backing insulation layer of pyrolysis furnaces, hot blast furnaces, ceramic roller kilns, electric porcelain drawer kilns and various high temp resistance furnaces.Used as the working lining or thermal insulation lining of high-temperature kilns such as gasification furnaces in the petrochemical industry, carbon black industrial reactors, and induction furnaces in the metallurgical industry.Used in the insulation layer of coke ovens, glass kiln vaults, hot blast furnace walls and domes, and does not directly contact high-temperature molten materials and alkaline gases.

Benefits of KERUI Lightweight Insulating Fire Brick

Low Thermal Conductivity
Good Chemical Resistance
Low Porosity
Low Impurity
Good Thermal Shock Resistance

Excellent Insulation Effect

KERUI lightweight insulating fire bricks are specifically designed to provide excellent insulation properties. Moreover, it has a low thermal conductivity, which means it effectively reduces heat transfer and minimizes energy loss. This high level of insulation helps maintain stable temperatures inside furnaces, kilns and other high-temperature environments. As an essencial product in insulation layer for kilns, customers can improve energy efficiency and reduce fuel consumption.

More Convenient Application

The lightweight nature of KERUI insulating fire brick makes it easy to handle and install. Compared to traditional heavy refractory bricks. Besides, these lightweight refractory bricks are easier to transport, position and work with. Additionally, the reduced weight also means less strain on workers during installation. This makes the whole process quicker, more convenient. As a result, these lightweight fire bricks extend the service life of kilns.

Fewer Energy Consumption

By providing superior insulation, KERUI lightweight fire brick helps conserve energy and reduce energy consumption. The efficient insulation properties of these fire bricks prevent heat loss and improve thermal efficiency in furnaces and kilns. This leads to significant energy savings, as less energy is required to maintain and regulate the desired temperature. Over time, these energy savings can translate into reduced operational costs for businesses.

Lightweight Insulating Fire Bricks
Kerui Lightweight Insulating Fire Bricks for Insulation Effect
Kerui Inspection of Lightweight Insulating Fire Bricks

How to Choose Suitable Insulating Firebrick?

1. Working Environment of Kilns

Understand the specific environment in which the insulating firebrick will be used. Consider factors such as temperature, chemical exposure and mechanical stress. More importantly, different insulating firebrick materials have varying resistance to heat, chemicals and physical wear. As a result, customers has better make sure to choose a brick that can withstand the conditions of your furnace or kiln.

2. Determine Physical and Chemical Index

Insulating firebrick have different physical and chemical properties that can affect their performance. Look for properties like thermal conductivity, density, compressive strength, and resistance to thermal shock. These properties determine the brick’s insulation efficiency, durability and ability to withstand rapid temperature changes. Select a brick with properties that align with your specific requirements.

3. Confirm the Quantity

It’s important to calculate the quantity as well as packing methods of insulating firebrick needed for your project. Consider the dimensions and layout of the furnace or kiln. Take into account any additional requirements, such as backup insulation or special shapes. Moreover, ordering the correct quantity of alumina silica brick ensures a smooth installation process and avoids delays or shortages.

4. Confirm the Project Period

Take into account the project timeline or construction schedule. Some insulating firebrick may have longer lead times or require custom manufacturing. Plan ahead and communicate with suppliers to ensure timely delivery of the bricks. Consider any potential delays in the construction process and choose a brick that aligns with your project timeline.

Use of Lightweight Insulating Fire Brick
Masonry of Lightweight Insulating Fire Brick

Get a Customized Lightweight Insulating Fire Brick Solution

Customize Size

Start by determining the specific dimensions and shapes you need for your project. Insulating fire bricks can be customized to fit various applications, including furnaces, kilns, and other thermal equipment. Consider factors such as the internal dimensions of the furnace, the layout of the heating elements, and any unique requirements of your project. Communicate these specifications to your supplier or manufacturer, who can guide you on the feasibility and provide you with a quote for the customized size.

Customize Composition

Insulating fire bricks can be made from different materials and compositions to suit specific needs. The composition of the brick can influence its thermal properties, chemical resistance and mechanical strength. Depending on your application and requirements, you may need a specific composition of lightweight refractory bricks. Discuss your needs with reliable insulation bricks manufacturer like Kerui, who can provide you with options for different compositions and help you select the most suitable one for your project.

KERUI Lightweight Insulating Firebrick
KERUI Lightweight Insulating Fire Brick for Sale
Different Sizes of KERUI Refractory Fire Bricks
Different Sizes of KERUI Refractory Brick

High Quality Products in Kerui Refractory

International Certificates

Kerui Refractory holds various international certificates that attest to the quality and reliability of their products. These certificates include ISO 9001:2015 for quality management, ISO 14001:2015 for environmental management, and OHSAS 18001:2007 for occupational health and safety management. These certifications demonstrate Kerui Refractory’s adherence to stringent standards in manufacturing processes, quality control and environmental sustainability.

Advanced Production Techniques

Kerui Refractory utilizes advanced production techniques to ensure the consistent quality of their products. With state-of-the-art facilities and equipment, they have the capability to manufacture a wide range of refractory materials, including bricks, castables, ceramic fibers etc. There are more info on Pinterest. The production processes are optimized for efficiency, precision and product performance, which results in high-quality refractory products that meet the specific requirements of various industries.

Kerui QMS Certificate
QMS Certificate
Kerui OHSM Certificate
OHSM Certificate
Kerui EMS Certificate
EMS Certificate
Kerui CE Certificate
CE Certificate
Quality Control Measures

Kerui Refractory implements rigorous quality control measures throughout the production cycle. From raw material selection to finished product inspection, every step is closely monitored to maintain the highest standards of quality. They conduct thorough testing and analysis to ensure that their products possess the desired physical, chemical, and thermal properties. By prioritizing quality control, Kerui Refractory delivers products that consistently meet or exceed customer expectations.

Research and Development

Kerui Refractory invests in continuous research and development to stay at the forefront of refractory technology. Their team of experts and engineers work on developing innovative solutions, improving product performance, and exploring new applications. Through collaborations with industry partners and academic institutions, Kerui Refractory strives to provide advanced and customized refractory products that cater to the evolving needs of their customers.


If you’re looking for high temp lightweight insulating fire bricks for your project, welcome to contact us. We’re able to provide professional solution for you.

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