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High-Quality Fused Cast Zirconia-Corundum AZS Block for Glass Kiln
Fused cast AZS block, also known as fused zirconia-corundum refractory block, is the core lining material for modern glass melting furnaces. The abbreviation AZS derives from its main chemical composition: Alumina, Zirconia and Silica.
Produced via electro-fusion casting technology, raw materials are completely melted in electric arc furnaces at ultra-high temperature, poured into moulds and annealed under controlled conditions. This special manufacturing process creates a dense, low-porosity microstructure that cannot be achieved by conventional sintered refractory bricks.
We supply mainstream grades including AZS-33#, AZS-36# and AZS-41#. The figure represents the mass percentage of zirconia. Higher zirconia content brings stronger resistance against molten glass erosion.
Core Advantages
- Outstanding resistance to corrosion and penetration of molten glass and alkali vapor
- High bulk density, low apparent porosity and excellent mechanical compressive strength
- Good thermal shock stability to withstand frequent temperature fluctuations inside kilns
- Low glass phase exudation, effectively reducing glass defects such as stones, cords and bubbles
- Stable long-term performance under continuous high-temperature operation
Typical Applications
AZS blocks are widely used in float glass furnaces, container glass furnaces, glass fiber furnaces and other glass melting equipment.
- AZS-33#: Melting tank superstructure, breast wall, crown, regenerator and forehearth
- AZS-36# & AZS-41#: Tank wall, tank bottom, throat, flow channel and other areas directly contacting molten glass
Custom dimensions and cutting processing are available to match different furnace construction requirements. If you need technical data sheets, chemical composition reports or commercial quotations, please contact our sales team directly.
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