What are zirconium corundum bricks?

What are zirconium corundum bricks

Zirconium corundum bricks, also known as zircon corundum bricks or AZS (alumina-zirconia-silica) bricks, are a type of high-performance refractory material used in demanding industrial applications, particularly in the glass and steel industries. These bricks are composed of a combination of zirconia (ZrO2), alumina (Al2O3), and silica (SiO2), which are carefully balanced to achieve excellent thermal, mechanical, and chemical properties.


Here are some key features of zirconium corundum bricks:


High Refractoriness: Zirconium corundum bricks can withstand extremely high temperatures, making them suitable for use in furnaces and kilns where other materials might fail.


Low Thermal Expansion: They have a relatively low coefficient of thermal expansion, which means they are less prone to

cracking or spalling under rapid heating and cooling cycles.

Corrosion Resistance: These bricks exhibit good resistance to molten glass and other aggressive materials, making them suitable for lining glass melting furnaces and steel ladles.


High Load Softening Temperature: Zirconium corundum bricks have a high load softening temperature, meaning they can withstand heavy loads at elevated temperatures without significant deformation.


Low Contamination: These bricks are known for their low potential to introduce impurities into the processed materials, which is crucial in applications where purity is essential, such as glass production.


Due to their excellent properties, zirconium corundum bricks are commonly used as sidewall and bottom refractory linings in glass tanks, furnace crowns, steel ladle linings, and other high-temperature industrial applications where extreme temperature and corrosion resistance are required.

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