Light Corundum Castable

      Light Corundum Castable is an unshaped refractory material composed primarily of high-purity corundum aggregates, combined with lightweight refractory fillers, high-quality binders, and functional additives. It is commonly applied in high-temperature insulation layers of industrial furnaces or in areas with strict requirements for low weight and energy efficiency. This castable can be used in combination with lightweight castables, alumina hollow sphere castables, and low-cement refractory castables to form graded insulation structures.

      The binders typically include CA-70 or CA-80 cement, binding clay, aluminum phosphate, and aluminum sulfate. Industrial alumina powder or corundum powder is used as the refractory powder, with over 90% of particles finer than 0.09 mm. The maximum particle size of hollow spheres is 5 mm, and either natural or graded particle distributions are employed. Additional admixtures and additives are incorporated as needed to optimize performance.

      During the operation of high-temperature industrial furnaces, heat loss directly impacts energy consumption and operating costs. While traditional dense refractory materials provide excellent refractory performance, their high bulk density and thermal conductivity can limit energy efficiency.

      Light Corundum Castable is a high-performance insulating refractory material that combines refractory properties with thermal insulation, meeting the energy-saving and consumption-reducing requirements of modern industrial furnaces.

Composed primarily of high-purity corundum, light corundum castables maintain structural stability and chemical corrosion resistance even at elevated temperatures. By incorporating lightweight aggregates and optimizing particle size distribution, a uniform and stable microporous structure is formed, effectively reducing bulk density and thermal conductivity without significantly compromising high-temperature strength. This helps to minimize heat loss from the furnace.

      In practical applications, light corundum castables can lower furnace shell temperatures, improve the operating environment, and reduce fuel or electricity consumption. Compared with traditional high-alumina or dense corundum castables, they provide superior thermal insulation under similar working conditions, enhancing overall equipment thermal efficiency.

      Additionally, light corundum castables exhibit excellent workability and moderate fluidity, making them suitable for conventional construction methods such as casting and vibration. They can form seamless, monolithic linings in complex structural areas, reducing heat loss and structural risks associated with joints. Their good volume stability further helps prevent shrinkage and cracking during high-temperature service.

      Light Corundum Castable is a refractory castable primarily composed of alumina. It is widely used as a lining material in carbon black reactors, high-temperature gasifiers, boilers, blast furnace hot blast stoves, heating furnaces, and ceramic kilns, making it a commonly used high-grade refractory in high-temperature industries.

      Hollow Corundum Spherical Castable is a type of corundum castable designed for service temperatures of 1600–1800 °C. It features a high load softening temperature, high mechanical strength, and excellent performance in strongly reducing atmospheres. Compared with dense corundum castables, it offers lower thermal conductivity and superior insulation performance, making it ideal for energy-efficient refractory linings.

Q1: Is this product primarily used for the working layer or the insulation layer?
A: It is mainly used for high-temperature insulation or supporting/backing layers and is not recommended for direct use as a high-wear wear layer.

Q2: Can light corundum castables be used at high temperatures for extended periods?
A: Yes. Within the design temperature range, the material exhibits stable performance and minimal volume change.

Q3: Are any special equipment required during construction?
A: No. Conventional mixing and casting equipment is sufficient for installation.

Q4: Does it support customizing different densities and thermal conductivity?
A: Yes. Custom designs can be provided based on furnace temperature and energy-saving requirements.

Q5: Do you support OEM/ODM cooperation?
A: Yes. We fully support OEM and ODM collaborations, offering flexible solutions from product customization to full-chain services according to customer needs.

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