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

K23 Insulation Brick

As a kind of high quality and affordable product, Kerui K23 insulating fire brick is popular in the insulation layer of kilns. This is one of the most cost-effective type of product for your kiln. Leanr more about the property and applications here.

  • 38.3%

    Al2O3 (≥)

  • 0.513g/cm³

    Bulk Density

  • 1315℃(2400℉)

    Classification Temperature

  • 1.0MPa

    Cold Crushing Strength


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KERUI K23 Insulation Brick

Technical Index K23 Insulation Brick

Kerui uses raw materials such as high-purity clay and alumina to manufacture K23 soft fire bricks. The following are the technical parameters of K23 bricks. The data comes from international industry standards. Of course, if you have customized needs, we will be happy to provide personalized solutions. Common customization solutions include: customized size, performance, ingredients, packaging, etc.

  • Standard size: 230×114×65mm;
  • Common size: wedge brick, arch brick, side brick, key brick, well block and so on;
  • Custom size: customized shape foe special area.
ω (Al2O3)/ ≥ %38.3
ω (SiO2)/ ≤ %44.3
Bulk Density (g/cm³)0.513
Classification Temperature ℃(℉)1315 (2400)
Cold Crushing Strength/MPa1.0
Thermal Expansion 1000℃(%)0.8
Thermal Conductivity Coefficient ≤/[W/(m·K)]260℃0.13
Different Sizes of KERUI K23 Insulation Brick
Different Sizes of KERUI Insulation Brick

Benefits of Using K23 Insulation Brick

Good Insulation Effect
Excellent Chemical Resistance
High Working Temperature
Good Mechanical Strength
Good Thermal Shock Resistance

Save Energy

K23 Insulation Bricks have excellent thermal insulation properties, allowing them to retain heat energy effectively. This is particularly beneficial in intermittent kiln operations, where the bricks can retain and release heat efficiently. By reducing heat loss, these bricks contribute to energy savings and improved overall kiln efficiency.

Improve Working Efficiency

Kerui K23 firebrick are manufactured with precise dimensions, ensuring accurate and consistent sizes. This precision allows for faster bricklaying, which saves time and labor costs. Additionally, these mullite insulation fire bricks require fewer irregularly shaped products and result in fewer brick joints, further enhancing working efficiency.

Extend Service Life of Kiln

K23 Insulation Bricks possess excellent resistance to thermal shock and chemical corrosion. This capability ensures the strength and stability of the refractory structure, thereby extending the overall service life of the kiln. The high-quality insulation provided by these bricks helps to maintain optimal kiln conditions and prevent premature wear and damage.

K23 Insulation Brick
Kerui Exports Excellent Insulation Bricks to Russia
K23 Insulating Fire Brick for Sale

Applications of K23 Insulation Brick

K23 Insulation Bricks find extensive applications in various industrial settings. They are primarily used in the furnace roof of hot blast stoves, as well as in the body and bottom of blast furnaces. These bricks are also commonly employed in the soaking chamber of glass melting furnaces, where they contribute to the efficient storage of heat. In addition, insulating fire bricks K23 are utilized in ceramic sintering kilns and as linings for the inaccessible corners of petroleum cracking system furnaces. Their versatility extends to being used as linings for industrial equipment, insulation layers, backing materials for kiln doors, and even in roofing applications. With the exceptional insulation properties and resistance to thermal shock and chemical corrosion, K23 insulating fire Bricks are a reliable choice for various critical applications in industrial environments. Welcome to follow Kerui VK account for more details.

Applications of Kerui Products

Reliable K23 Insulation Brick Manufacturer – Kerui Refractory

Authoritative Certificate

Kerui Refractory holds various authoritative certificates, including ISO, CE, and SGS certifications. These certifications are a testament to their commitment to maintaining high-quality standards and ensuring customer satisfaction. ISO certification confirms that Kerui Refractory follows international quality management standards in their manufacturing processes. CE certification signifies that their products meet the safety, health, and environmental protection requirements within the European Economic Area.

Fast Delivery

For standard K23 bricks, there is enough stock. For customized orders, they commit to completing the production within 7 days, which ensurs a quick turnaround time. Throughout the delivery process, Kerui Refractory China provides full tracking feedback on the latest status of the shipment. This level of transparency and efficiency allows customers to plan their projects effectively and have peace of mind knowing that their insulation bricks will arrive promptly.

Strict Quality Control

Kerui implements strict quality control measures at every stage of the manufacturing process, including raw material selection, ingredient mixing, brick formation, polishing, and packaging. Each batch of insulation bricks undergoes thorough physical and chemical inspections to ensure that they meet the highest quality standards. By prioritizing quality control, Kerui Refractory guarantees that their customers receive insulation bricks that are reliable, durable, and perform optimally in demanding environments.

Professional Service

There are professional engineers who have extensive knowledge and expertise in the field of insulation bricks, allowing them to offer valuable guidance and support. Whether customers have questions about product specifications, installation techniques, or troubleshooting, the technical engineers at Kerui Refractory are readily available to assist. Their commitment to providing exceptional customer service ensures that customers receive the necessary support and solutions tailored to your specific needs.

Kerui QMS Certificate
QMS Certificate
Kerui OHSM Certificate
OHSM Certificate
Kerui EMS Certificate
EMS Certificate
Kerui CE Certificate
CE Certificate


If you need high quality K23 insulation bricks for sale, welcome to contact Kerui for a perfect solution. More importantly, there are a lot of good feedback about excellent high temp refractory products as well as Kerui service. Welcome to contact Kerui. We’ll reply soon and offer one to one service.

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