Lightweight Insulating Castable Refractory

Lightweight insulating castable refractory is the most ideal product for construction in areas with alkali corrosion resistance at high temperatures. Moreover, it has the characteristics of acid corrosion resistance, high temperature resistance, thermal stability and convenient construction.

  • Bulk Density: 0.5g/cm³ – 1.8g/cm³
  • Max Service Temperature: 1150℃ – 1350℃
  • Cold Crushing Strength: 1.5MPa – 30MPa

Parameter of Lightweight Insulating Castable Refractory

Bulk Density (g/cm³)
Max. Service Temperature/℃1150120012501250130013001350
Thermal Conductivity Coefficient ≤/[W/(m·K)]350℃
700℃0.20 0.30 0.40.450.50.70.75
Cold Crushing Strength ≥/MPa110℃*24h1.52.0 4.0 5.5101520
1000℃*3h1.52.0 5.56.5152030
Permanent Linear Change (1000℃*3h)/%-1.5-1.0 -1.0 -0.5-0.5-0.5-0.5

Classification of Lightweight Insulating Castable Refractory

Lightweight insulating refractory castables can be divided into three categories according to use temperature:

  • Low temperature insulating lightweight refractory castable, operating temperature is 600℃(1112℉) – 900℃(1652℉);
  • Medium temperature insulating lightweight refractory castable, operating temperature is 900℃(1652℉) – 1200℃(2192℉);
  • High temperature insulating lightweight refractory castable, operating temperature is >1200℃(2192℉).

The castable refractory cement has a wide range of applications. In the lining of kilns in the metallurgical, mechanical, petrochemical and power industries, we generally use insulation castable as the thermal insulation layer. But now, with the improvement of the material of lightweight refractory castables and the advancement of preparation technology, there are many occasions where they are directly used as the working lining of atmosphere furnaces.

Generally, we mainly use low and medium temperature linsulating castable material as thermal insulation linings, which are not in direct contact with flames. However, high-temperature lightweight castables can be directly used as working linings in contact with melt or solid media in the furnace. In particular, we can use it as a working lining for various heating furnaces and heat treatment furnaces. This can significantly save energy consumption.

Lightweight Insulating Castable Refractory
Insulation Castable

Advantage of Lightweight Insulating Castable Refractory

Excellent Features

The Kerui high temp castable refractory has the characteristics of high temperature resistance, low density, good thermal insulation, low water absorption, strong peeling resistance and resistance to chemical corrosion of acidic and alkaline gases. Therefore, its use can make the temperature in the furnace uniform and reduce the structural weight of the furnace or equipment. In addition, its small volume density can reduce kiln heat consumption.

Good Workability

It has good workability, strong adhesion, long initial setting time and construction operability time. In addition, its strength increases quickly, its impermeability is strong and it does not require acidification treatment. Therefore, it is easy to ensure that the mortar joints of the masonry are dense and full. This also significantly improves the air tightness, integrity and anti-corrosion capabilities of the inner walls of equipment such as flues.

Kerui Lightweight Insulating Castable Refractory for Sale
Kerui High Quality Lightweight Insulating Castable Refractory

Application of Insulating Castable Refractory

Use it Directly

On the one hand, you can also use it directly on lined insulation such as high-temperature industrial kiln insulation. For example, insulation or single-layer lining of rotary kilns, industrial kilns, tall chimneys, high-temperature flues and air ducts. In addition, you can also use it in acid-resistant tanks, storage tanks and other acid-resistant projects in petroleum, chemical, non-ferrous metallurgy and other industries.

Use it as Refractory Precasts

On the other hand, it is an unshaped refractory material suitable for casting molding. You can contact us to tell us your specific needs and desired refractory precast shapes. Then, Kerui’s technical engineers will help you design refractory prefabricated blocks suitable for your industrial equipment for free. If you want to know more about the uses of various types of castables, you can contact us for more details.Kerui Refractory Precast Blocks Shipped to Russia

Benefits of Purchasing Kerui Lightweight Insulating Castable Refractory

Reasonable Price

We ensure that the best refractory material prices are competitive in the market through optimization of production processes and reasonable allocation of resources. Therefore, customers can purchase high-quality refractory materials at reasonable prices from Kerui, achieving a good balance between cost and performance.

Multiple Patent Certificates

Kerui castables have multiple patent certificates, which reflects our technical strength and innovation capabilities in the field of refractory materials. These patents guarantee the uniqueness and superiority of our products. So, customers can choose Kerui castables with confidence and we ensure its stability and reliability.

Five Major Production Plants

Kerui has established a production factory equipped with advanced production equipment in a gathering place of refractory raw materials. In addition to castables, we also produce refractory bricks, heat insulation bricks, fire cement and ceramic fiber products. So, we can meet the needs of our customers in different regions and sizes.

Professional Technical Guidance

Kerui can provide personalized product selection suggestions based on customers’ specific needs and application scenarios. In addition, we also provide construction plan development and on-site operation guidance services. Our purpose is to help customers solve technical problems and ensure the best use and performance of products.

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

Kerui Factory


At Kerui, you can buy cost-effective lightweight insulating castable refractory and get your exclusive service for free! Please leave your specific needs in the message box on our page and we will reply to you within 24 hours! You can also follow us on Pinterest for more details.

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