Premium Zirconia Alumina Brick for High Temperature Furnace Lining

Overview

The AZS series fused cast zirconia alumina bricks are premium refractory products designed for extreme high temperature and corrosive environments such as glass melting furnaces. Available in three grades (AZS-33Y, AZS-36Y, AZS-41Y) with increasing ZrO2 content, they offer excellent thermal shock resistance, low porosity, and superior corrosion resistance against molten glass. Multiple casting methods (PT, QX, ZWS, WS) allow customization for different furnace geometries and performance requirements.

Product Features

Precise Chemical Composition by Grade

• AZS-33Y: ZrO2 greater than or equal to 33.00%, Al2O3 balance, SiO2 less than or equal to 16.00%, Na2O less than or equal to 1.45%
• AZS-36Y: ZrO2 greater than or equal to 35.90%, Al2O3 balance, SiO2 less than or equal to 14.00%, Na2O less than or equal to 1.38%
• AZS-41Y: ZrO2 40.00% to 44.00%, Al2O3 balance, SiO2 less than or equal to 12.85%, Na2O less than or equal to 1.25%
• All grades: total impurities Fe2O3 TiO2 CaO MgO Na2O K2O less than or equal to 2.00%

Superior Physical Properties

• Bulk density varies by grade and casting method (see table)
• Apparent porosity less than or equal to 1.5% for AZS-33Y, less than or equal to 1.0% for AZS-36Y and AZS-41Y
• Static corrosion rate against glass at 1500 degrees Celsius: AZS-33Y less than or equal to 1.55 mm/24h, AZS-36Y less than or equal to 1.48 mm/24h, AZS-41Y less than or equal to 1.28 mm/24h
• Glass phase exsolution temperature greater than or equal to 1410 degrees Celsius for all grades
• Bubble precipitation rate at 1300 degrees Celsius for 10 hours less than or equal to 1.0%
• Glass exudation rate at 1500 degrees Celsius for 4 hours less than or equal to 3.0%

Multiple Casting Methods

• PT conventional casting for standard blocks
• QX tilt casting for improved internal structure
• ZWS near shrinkage free casting for reduced defects
• WS shrinkage free casting for maximum integrity
• Each method tailored to specific furnace geometry and performance requirements

Technical Specifications

Applications

• Glass melting furnace throat breast wall and bottom blocks
• Metallurgical furnaces requiring high zirconia content
• High wear areas in corrosive high temperature environments
• Foundries and ceramic kilns

Why Choose GWDLTHERM AZS Bricks

• Strict quality control based on international standards
• Three grades to match different cost and performance needs
• Multiple casting options for precise installation
• Proven performance in global glass and steel plants
• Fast delivery and custom sizing available

FAQ

Q1: What is the difference between AZS-33Y, AZS-36Y and AZS-41Y?

A1: Higher ZrO2 content provides better corrosion resistance and higher density. AZS-41Y offers the best performance for critical areas, while AZS-33Y is more economical for less demanding zones.

Q2: Which casting method should I choose?

A2: PT for general use, QX for complex shapes, ZWS for moderate shrinkage control, and WS for critical zero defect zones.

Q3: What is the maximum service temperature?

A3: All grades can operate continuously above 1600 degrees Celsius with glass phase stability maintained above 1400 degrees Celsius.

Q4: Is the product suitable for soda lime glass?

A4: Yes, the low porosity and optimized chemistry make it ideal for soda lime borosilicate and lead crystal glass.

Q5: Do you provide test certificates?

A5: Yes, each batch includes full chemical and physical property reports.