Fused Cast Refractory - Fused Cast AZS & High-Zirconia Refractory Blocks for Glass Furnaces
Dezhong manufactures high-density fused cast refractories engineered for direct contact with molten glass under high thermal loads and aggressive chemical environments. Produced through electric arc melting, precision casting, and controlled annealing, our blocks deliver long campaign life and tight joint alignment.
We supply standard and fully machined custom shapes according to customer drawings for container glass, float glass, specialty glass, and fiberglass furnaces.
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![Electric Melting Z80 High Zirconia Bricks]()
Electric Melting Z80 High Zirconia BricksProducts Description Electric melting Z80 high-zirconia brick is a special ceramic refractory with high zirconia content and low silica/sodium levels, designed for severely corroded glass-contact -
![Fused Cast AZS Blocks]()
Fused Cast AZS BlocksThe Fused Cast AZS Blocks are manufactured using a fused-cast process that employs high-quality purified raw materials, utilizes specialized electric arc furnaces, and undergoes long-arc melting -
![Fused Cast AZS 33 Blocks]()
Fused Cast AZS 33 BlocksFused Cast AZS 33 blocks are exceptionally superior in preventing the contamination of molten glass; they exhibit a very low propensity to cause stones, bubbles, or the precipitation of matrix glass -
![Fused Cast AZS 36 Blocks]()
Fused Cast AZS 36 BlocksFused Cast AZS 36 blocks are standard electro-fused zirconia-corundum bricks produced via the oxidation method. They are characterized by exceptionally high resistance to glass melt corrosion and low -
![Fused Cast AZS 41 Blocks]()
Fused Cast AZS 41 BlocksFused Cast AZS 41 blocks represent the highest grade of oxidized electro-fused zirconia-corundum refractories, distinguished by their superior resistance to glass melt corrosion and outstandingly low -
![Chrome Corundum Brick]()
Chrome Corundum BrickChrome Corundum Bricks are manufactured using high-purity alumina and chromium oxide as primary raw materials, processed through a high-temperature sintering technique. They exhibit excellent -
![3D Assembly Drawing Of Glass Melting Furnace]()
Quick Grade Selection Matrix
|
Grade |
ZrO2 Content (%) |
Primary Microstructure / Advantage |
Typical Furnace Application |
|
Fused Cast AZS 33 |
32.5 - 34.5 |
High cost-performance, good thermal shock resistance |
Melter paving, sidewalls, forehearth, working end |
|
Fused Cast AZS 36 |
35.0 - 37.0 |
Enhanced resistance to molten glass erosion & turbulence |
High-pull melting zones, doghouse, feeder channels |
|
Fused Cast AZS 41 |
40.5 - 42.5 |
Highest corrosion resistance against aggressive glass flows |
Throat, hot-spot sidewalls, electrode blocks, bubbling zones |
|
Z80 High-Zirconia |
>= 80.0 |
Ultra-low stone and bubble potential, superior glass compatibility |
Specialty/optical glass, high-corrosion contact zones |
Application Guide by Furnace Zone
Melting Tank Sidewalls
Critical Demands: Chemical corrosion, line erosion, and thermal shock.
Recommended Grades: AZS 36 (Standard melting zones) / AZS 41 (Hot-spot zones, high-pull furnaces).
Furnace Throat & Doghouse Corners
Critical Demands: High glass flow velocity, severe turbulence, and mechanical wear.
Recommended Grades: AZS 41 (Ensures structural integrity and prevents premature campaign failure).
Tank Bottom & Paving
Critical Demands: Downward glass penetration, metal drilling corrosion, and thermal insulation balance.
Recommended Grades: AZS 33 (Standard paving) / AZS 36 (Under throat or heavy convection currents).
Forehearth, Refining & Working End
Critical Demands: Strict control over refractory-derived defects (stones, bubbles, cords) affecting glass yield.
Recommended Grades: AZS 33 (Container/Float) / Z80 High-Zirconia (Pharmaceutical & Optical Glass).
100% Factory Dry Pre-Assembly
To eliminate field installation delays and joint misalignments, Dezhong performs full dry pre-assembly of critical furnace sections at our facility prior to shipment.
Match-Marking: Every block is clearly numbered and match-marked according to your installation drawings.
Joint Gap Control: Dry joints are verified to maintain tight tolerances, reducing glass leak risks during burn-in.
Precision Machining Tolerances
Machined Joint Gap: <= 0.5 mm
Dimensional Tolerance: According to ISO / ASTM standards or customer-specified CAD parameters.
Surface Finishing: Diamond-tooled cutting and grinding for precise contact surfaces, grooves, and expansion joints.
Technical Specifications
|
Physical & Chemical Property |
AZS 33 |
AZS 36 |
AZS 41 |
Z80 |
|
Al2O3 (%) |
49.0 - 51.0 |
45.0 - 48.0 |
41.0 - 43.0 |
<= 10.0 |
|
ZrO2 (%) |
32.5 - 34.5 |
35.0 - 37.0 |
40.5 - 42.5 |
>= 80.0 |
|
SiO2 (%) |
13.0 - 15.0 |
12.0 - 14.0 |
11.0 - 13.0 |
10.0 - 12.0 |
|
Bulk Density (g/cm3) |
>= 3.80 |
>= 3.85 |
>= 3.95 |
>= 4.30 |
|
Apparent Porosity (%) |
<= 1.5 |
<= 1.2 |
<= 1.0 |
<= 2.0 |
|
Cold Crushing Strength (MPa) |
>= 350 |
>= 350 |
>= 400 |
>= 300 |
Certificate
Export Packaging & Logistics Protection
Machined Surface Protection: Critical faces and edges are wrapped with protective foam sheeting.
Fumigated Wooden Crate Packaging: Fully enclosed, heat-treated wooden boxes designed for sea freight handling.
Moisture-Proof Vacuum Sealing: Prevents atmospheric corrosion and condensation damage during long sea voyages.
Request a Technical Evaluation & Quotation
To receive an accurate technical proposal and pricing within 24 hours, please prepare and provide the following project details:
Glass Type & Application (e.g., Soda-lime, Borosilicate, Container, Float)
Target Furnace Zone & Operating Temperature
Required Block Dimensions or CAD / PDF Installation Drawings
Preferred Grade & Quantity (Tonnage or Block Count)
Destination Port / Delivery Schedule
FAQ
We are one of the most professional fused cast refractory manufacturers and suppliers in China, specialized in providing high quality customized service for global clients. We warmly welcome you to buy high-grade fused cast refractory made in China here from our factory.
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