Lightweight corundum mullite brick is a high-performance lightweight refractory material with corundum and mullite as the main components. It has the characteristics of low thermal conductivity, high temperature resistance, thermal shock resistance and good chemical stability. It is widely used in the thermal insulation layer of industrial kilns and high-temperature working environments.
1. What fields are lightweight corundum mullite bricks mainly used in?
Metallurgical industry: used for thermal insulation lining of equipment such as ladles, tundishes, and heating furnaces to reduce heat loss and improve energy efficiency.
Petrochemical industry: as an insulation layer for high-temperature devices such as cracking furnaces and converters to resist acidic gas erosion.
Ceramic and glass industry: used for kiln linings to reduce energy consumption and maintain a stable firing temperature.
Power industry: used in the thermal insulation structure of high-temperature equipment such as boilers and incinerators to improve thermal efficiency.
2. What are the performance advantages of the lightweight corundum mullite bricks produced by our company?
Lightweight and low thermal conductivity: The volume density is usually 1.0~1.8 g/cm³, and the thermal conductivity is low (0.3~0.8 W/(m·K)), which effectively reduces heat loss.
High temperature resistance: The long-term use temperature can reach 1400~1600℃, and some high-purity products can reach above 1700℃.
Good thermal shock resistance: The mullite phase gives the material excellent thermal shock stability and is suitable for environments with large temperature fluctuations.
Chemical inertness: It has good resistance to acidic and weak alkaline media and is suitable for a variety of industrial atmospheres.
3. Typical application structure
Composite lining structure: Used in conjunction with heavy refractory bricks (such as corundum bricks and silicon carbide bricks) to form a "working layer + insulation layer" structure, taking into account both strength and energy saving.
High-temperature kiln backing: As a backing insulation material, it reduces the kiln shell temperature and extends the life of the furnace.
Lightweight corundum mullite bricks have become one of the key materials for energy saving and consumption reduction in modern high-temperature industrial furnaces due to their excellent thermal insulation properties and high-temperature stability.