Mullite Castable

The raw material of mullite castable is high quality porous mullite aggregate. Then, we add fine powder and additives to stir it into refractory castable. In addition, the critical particle size of mullite aggregate is 12mm. The long-term use temperature of mullite castable is 1350℃(2462℉).

  • Al2O3(≥): 55% – 70%
  • Bulk Density(≥): 2.3g/cm³ – 2.6g/cm³
  • Flexural Strength(≥): 7MPa – 9MPa
  • Compressive Strength(≥): 40MPa – 70MPa
Mullite Castable

Mullite Castable Specification

ω (Al2O3) ≥/%55606570
Bulk Density ≥/ (g/cm³)
Flexural Strength ≥/MPa7789
Compressive Strength ≥/MPa40506070
Permanent Linear Change ≤/%±0.5±0.5±0.5±0.5

Tips: this table is formulated concerning Chinese refractory industry standards. Contact us or follow us on Pinterest for more information.

Benefits of Mullite Castable

Good Thermal Insulation Performance
High Structural Strength
Low Creep Rate
Low Thermal Expansion Rate
Strong Chemical Corrosion Resistance
Strong Thermal Shock Resistance
Low Thermal Conductivity

Mullite castables have high use temperatures and can be used as working linings in direct contact with flames. This can achieve high-temperature energy conservation. Moreover, its unit density is light, which can reduce the structural weight of the kiln by 40% – 60%. This eliminates the hidden danger of broken hard fire brick hanging on the furnace roof. In addition, customers can use Kerui mullite castables to quickly dry the furnace and shorten the drying period. Its economic benefits are very significant.

Buy Kerui Mullite Castable
High-Quality Mullite Castables
Kerui Mullite Refractory Castable for Sale

Advantages of Kerui Mullite Castable

High Cost Performance

Due to the long service life and low maintenance cost of mullite refractory castables, its comprehensive cost performance is better than traditional refractory materials.

Energy Saving

Mullite refractory castables have high thermal stability. Therefore, it can effectively improve the thermal efficiency of industrial kilns and reduce energy consumption.

Strong Adaptability

Mullite refractory castables are suitable for various high-temperature industrial kilns. Especially in the temperature range below 1400℃(2552℉), it has a good use effect.

Environmental Protection

Kerui’s mullite refractory castables use composite binders. This also avoids harmful impurities in calcium alumina cement and is beneficial to environmental protection.

KERUI Mullite Castable Manufacturer
KERUI High Quality Refractory Castable

Mullite Castable Uses

In general, mullite castables are mainly used in the field of refractory materials. In addition to making it into precast blocks, it also plays an important protective role in various high-temperature, high-pressure and corrosive environments. We usually use it for the following purposes:

  • Furnace lining: mullite castables can be used for the lining of various high-temperature industrial furnaces. Such as steelmaking furnaces, aluminum smelting furnaces and glass kilns. It is resistant to high temperature, wear and erosion. Therefore, it can protect the furnace body from damage by high temperature and chemical corrosion.
  • Insulation material: Kerui mullite castables also have excellent thermal insulation properties in high-temperature environments. Like the aluminum silicate blanket, you can use it as a thermal insulation material. It can reduce heat energy loss inside and outside the furnace.
  • Casting molds: mullite castables can be used to make casting molds. We can use it to cast high-temperature alloys, ceramics and other materials to ensure the accuracy and surface quality of castings.
  • Packing material: in the maintenance and repair of high-temperature industrial equipment, we can also use it as a patching material. For example, repair damage or cracks in furnace bodies, pipelines and other components. In other words, it can extend the service life of the equipment.

Refractory Castables for Kilns
Refractory Castable Construction
Construction Workers Pouring Refractory Castables

Mullite Castable Manufacturer in Kerui Group

Technological Innovation

Through continuous R&D investment and technological accumulation, Kerui’s mullite castables are in the leading position in the industry in terms of performance and quality. Kerui’s R&D team has been launching new products that meet market demand. So, we meet the needs of customers in different fields.

Product Quality

Kerui Group also strictly implements the ISO9001 quality management system standards and has established a complete quality management system. Moreover, from raw material procurement to product delivery, every link is strictly controlled to ensure stable and reliable castables and dry ramming mass quality.

Customer Service

Our company has an efficient sales team and technical service team. That is to say, we are able to respond to customer needs in a timely manner and provide customers with personalized solutions. In addition, Kerui pays attention to customer needs and always adheres to the concept of customer first.

Development Vision

As the castables and fireproof cement suppliers, Kerui Group will continue to uphold the purpose of “quality first, customer first”. Kerui has excellent quality, technological innovation and high-quality service. Therefore, we will continue to be a leading enterprise in the high-temperature industry.

High Temperature Ceramic Insulation laboratory

Delivery of Unshaped Refractories


Kerui can provide mullite castable specifications, categories and competitive prices. From raw material procurement to final product inspection and after-sales service, we ensure that the refractory products provided to customers are 100% qualified. Moreover, we can also customize castables and other refractory products according to customer requirements. Welcome to email us for free quotes and price lists.

    Contact Us

    • * Name:

    • * Email:

    • * Phone/Whatsapp (including area code):

    • Country:

    • * MessagePlease leave the following information for quicker reply: product name, specifications, dimension/ drawing, quantity, usage, etc.