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Get PriceAZS refractory materials (Al₂O₃–ZrO₂–SiO₂) are core lining materials for glass furnaces. Different AZS brick grades show significant performance differences in corrosion resistance, glass contamination control, and service life. Correct selection of AZS 33, AZS 36, and AZS 41 for specific furnace zones directly affects furnace campaign life and glass quality.
This article provides a technical analysis of how different AZS refractory grades are applied in various glass furnace lining areas, based on industry standards and practical furnace experience.
AZS refractory bricks are produced by fused cast technology, ensuring high density and uniform microstructure. Their main technical advantages include:
Because of these characteristics, fused cast AZS refractory bricks are widely used in float glass, container glass, and special glass furnaces.
| Grade | Al₂O₃ (%) | ZrO₂ (%) | SiO₂ (%) | Glass Phase (%) | Max Service Temp |
|---|---|---|---|---|---|
| AZS 33 | 32–35 | 32–35 | 14–17 | 18–22 | 1700–1750°C |
| AZS 36 | 47–50 | 32–35 | 13–15 | 15–18 | 1750–1780°C |
| AZS 41 | 45–48 | 40–42 | 11–13 | 10–13 | 1780–1850°C |
Reference: YB/T 4579-2016, Fused Cast Refractories Industry Standard
As ZrO₂ content increases, glass phase content decreases, resulting in stronger corrosion resistance and lower glass contamination risk.
AZS 33 is the most economical and widely used grade. Typical applications include:
Technical rationale:
AZS 33 provides balanced corrosion resistance and cost efficiency. For areas not in direct contact with molten glass, it delivers stable performance and reliable service life.
AZS 36 is a key lining material for critical furnace zones, including:
Technical rationale:
With higher Al₂O₃ content and lower glass phase, AZS 36 offers significantly improved corrosion resistance. In float glass furnaces, it is commonly used in hot spots to achieve long campaign life.
AZS 41 represents the highest performance level in the AZS series. It is mainly used in:
Technical rationale:
With ZrO₂ content ≥40%, AZS 41 provides maximum resistance to glass corrosion and the lowest risk of glass defects, making it essential for premium glass production.
Glass Type
Furnace Zone Conditions
Cost–Performance Balance
The successful application of AZS refractory lining is not based on material grade alone, but on precise matching between furnace design, operating conditions, and glass type. Rational configuration of AZS 33, AZS 36, and AZS 41 allows glass manufacturers to optimize furnace life, control production costs, and maintain stable glass quality.
As an experienced AZS refractory supplier, Kerui Refractory provides technical support based on material testing, furnace condition analysis, and long-term application data, helping customers achieve reliable and verified glass furnace lining solutions.