As a high-performance refractory material, lightweight mullite bricks are widely favored in global industrial fields for their excellent thermal insulation, high-temperature resistance, and lightweight properties. Designed to meet the strict requirements of high-temperature equipment, these bricks not only reduce energy consumption but also extend the service life of industrial furnaces, making them an ideal choice for enterprises pursuing efficiency and sustainable development.
The specifications of lightweight mullite bricks are standardized and customizable to adapt to different industrial scenarios. The main models include JM23, JM25, JM26, JM27, JM28, JM30, and JM32, with alumina content ranging from 40% to 77% and iron oxide content no more than 1.0% (down to 0.5% for high-purity models). Their bulk density is 0.55g/cm³ to 1.35g/cm³, and the cold crushing strength is 1.0MPa to 3.5MPa, ensuring stable performance under different load conditions. The classification temperature is 1260℃ to 1760℃, the load softening start temperature is 1080℃ to 1570℃, and the permanent linear change rate after high-temperature heating is -1.5% to 0.5%. The standard size is 230x114x65mm, and custom sizes are available according to customer needs for seamless masonry.
The thermal conductivity of lightweight mullite bricks is as low as 0.18W/(m·K) at 200℃, which can effectively reduce heat loss and improve energy utilization—a key advantage in industrial production. Made of high-purity alumina and silica, these bricks form a stable mullite crystalline structure, containing a small amount of glass phase, cristobalite, or corundum, which greatly enhances their thermal shock resistance and chemical corrosion resistance. They can be directly in contact with flames, eliminating the need for additional insulation layers and simplifying the masonry process.
Lightweight mullite bricks have a wide range of applications, covering metallurgy, ceramics, glass, petrochemical and other industries. In the metallurgical industry, they are used for the lining of hot blast furnaces, blast furnace bodies and bottoms, and steelmaking electric furnace tops, which can not only maintain stable temperatures but also reduce energy consumption. In the ceramic industry, they are ideal materials for roller kilns, shuttle kilns, and drawer kilns, enabling rapid heating and cooling cycles and improving production efficiency.
In the glass industry, they are applied to glass melting furnace regenerators and feed channels, which can resist high temperatures and chemical erosion to ensure product quality. In the petrochemical industry, they are used for the lining of petroleum cracking furnaces, synthetic ammonia conversion furnaces, and residue oil gasification furnaces, which can withstand harsh working environments. In addition, they are widely used in various electric furnaces, incinerators, and high-temperature reaction equipment, providing reliable thermal insulation and structural support.
Compared with traditional refractory bricks, lightweight mullite bricks have obvious advantages: low density can reduce furnace weight and structural load, low thermal conductivity can save 15%-20% of fuel, and high purity ensures stable performance in complex atmospheres. Whether it is standard specifications or custom specifications, they can meet the diverse needs of different industries. Choose our high-quality lightweight mullite bricks to help you reduce operating costs, improve production efficiency, and achieve green and sustainable development.
Post time: Apr-03-2026
