Physical and Chemical Indicators of Mullite Insulating Bricks

Product Specifications
Size: 230mm × 114mm × 65mm

Product Introduction
Mullite insulating bricks, also known as lightweight mullite bricks or mullite thermal insulation bricks, are high-quality insulating refractory bricks made from high-grade bauxite clinker as the main raw material, mixed with a suitable amount of clay, additives, and water to form a plastic or slurry material, which is then extruded and fired at high temperatures.

Mullite insulating bricks primarily consist of mullite (3Al₂O₃·2SiO₂) as the main crystalline phase. The alumina content typically ranges between 40% and 75%. Besides mullite, bricks with lower alumina content contain small amounts of glass phase and quartz, while those with higher alumina content contain small amounts of corundum.

Lightweight mullite insulating bricks are widely used in emerging industrial kilns and high-temperature equipment. As global energy conservation demands increase, the development of lightweight insulating materials is accelerating. Lightweight mullite bricks are ideal insulating refractory materials domestically and internationally due to their excellent chemical stability, high temperature resistance, precise dimensions, uniform structure, aesthetic appearance, and low thermal conductivity. They are extensively used in hot blast stoves, glass crucibles, metal smelting furnaces, ceramic tunnel kilns, roller kilns, electric porcelain shuttle kilns, among others, offering broad market prospects.

Product Price
For the prices of JM23, JM26, JM28, and JM30 mullite insulating bricks, please contact us immediately. We will provide you with the most favorable prices and high-quality products.

Product Classification
Mullite insulating bricks are classified by grade into JM23, JM26, JM28, and JM30.

They are also classified by density into lightweight mullite insulating bricks and corundum mullite bricks (also known as dense mullite insulating bricks).

By usage temperature, they are classified into 1350°C mullite insulating bricks, 1450°C mullite insulating bricks, and 1550°C mullite insulating bricks, with the 1550°C mullite bricks capable of direct flame contact, featuring high temperature resistance, low thermal conductivity, and significant energy-saving effects.

Product Features
The low thermal conductivity of mullite insulating bricks results in excellent thermal insulation.
They have low heat storage and thermal conductivity, making them highly energy-efficient for intermittent operations.
Low impurity content ensures high refractoriness, and high alumina content allows good performance in reducing atmospheres.

High compressive strength at high temperatures ensures the stability and strength of the brickwork.
Accurate dimensions speed up construction, reduce the use of refractory mortar, and enhance the strength and stability of the lining, thus extending its lifespan.
Easily processed into special shapes as per customer requirements, reducing the number of bricks and joints needed.

product Applications
Mullite insulating bricks can be used as hot surface refractory linings or as back insulating layers for other refractory materials. They are mainly used in the tops of hot blast stoves, furnace bodies, and furnace bottoms of blast furnaces, regenerator chambers of glass melting furnaces, ceramic sintering kilns, dead corners of petrochemical cracking systems, ethylene cracking furnaces, tubular heating furnaces, ammonia converters, gas generators, high-temperature shuttle kilns, tunnel kilns, ceramic roller kilns, and pusher plate kilns, among other industrial furnaces.