Refractories for Float Glass Furnaces · Comprehensive Solutions
01 AZS-41 - Maximum Corrosion Resistance
Features: ZrO₂ ≥ 41%, bulk density ≥ 4.0 g/cm³; exceeds national standards.
Advantage: Engineered for the melter bottom and throat - highest chemical attack zones in a float glass furnace. Superior resistance to molten glass erosion.
Benefit: Longer campaign life. Fewer unplanned shutdowns. More production days per year.
02 Complete Furnace Zone Coverage
Product Range: AZS-33/36/41 · Fused Silica Bricks · Zircon Bricks · High-Alumina Bricks · Mullite Bricks · Monolithic Refractories (Full Series)
Advantage: One supplier covers every zone - melter, crown, regenerator, forehearth, and joint sealing. No multi-vendor coordination required.
Benefit: Simplified procurement. Consistent quality across all zones. Single point of accountability.
03 European Quality · Factory Price
Features: European certified + Nationally recognized trusted product in the glass kiln industry + Certification and testing reports provided with shipment.
Advantage: DZR AZS blocks are European-certified-quality exceeding international brands. Fuyao Group relies on DZR for consistent performance.
Benefit: Proven, bankable quality with factory-direct pricing. No distributor margin. Better ROI.
PRODUCT SELECTION GUIDE
The precise selection of refractory materials directly determines kiln lifespan and glass quality. The following comparison chart helps you select the most suitable Dezhong products for each section:
| Zone | Condition | DZR Product | Key Reason |
| Melter bottom & lower sidewall | 1,600 °C+, highest glass corrosion | AZS-41 | Maximum ZrO₂ content |
| Melter upper sidewall | Glass-line zone, flame + glass attack | AZS-36 | High resistance, cost-balanced |
| Crown / arch | Continuous flame, volatile batch attack | Fused Silica Brick | Near-zero expansion, no contamination |
| Throat | Max glass velocity, severe erosion | AZS-41 | Highest erosion resistance |
| Refiner & working end | Moderate corrosion, homogenization zone | AZS-33,AZS-36, | Adequate resistance, optimized cost |
| Breast wall | Flame erosion above glass-line | AZS-33,Chrome Corundum Brick | Flame erosion resistance |
| Regenerator | Thermal cycling ±700 °C, every 20–30 min | High Alumina Brick,Sillimanite Brick | Thermal shock resistance |
| Forehearth & channels | Glass purity critical, moderate temp | Zircon Brick,AZS-33 | Glass purity maintenance |
| Doghouse | Batch abrasion, thermal shock | Corundum Brick,AZS Blocks | Batch abrasion resistance |
| Insulation backup | Behind hot face, energy saving | Mullite Insulation Brick,Alumina Bubble Brick | Heat retention, energy saving |
| Joints & repairs | All zones, hot or cold repair | Zirconium Refractory Mortar,AZS Ramming Mass | Matched expansion, sealing |
TECHNICAL SPECIFICATIONS
All products are tested by CMA-certified laboratories, and a test report accompanies every shipment.
★ AZS-41 bulk density is ≥4.0 g/cm³, exceeding national standards.
| Product | ZrO₂ / Al₂O₃ | Bulk Density g/cm³ | Porosity | Max Temp. | Application |
| Fused Cast AZS-33 | ZrO₂ ≥ 33% | 3.75–3.85 | ~1% | 1,600 °C | Refiner, working end |
| Fused Cast AZS-36 | ZrO₂ ≥ 36% | 3.85–3.95 | ~1% | 1,650 °C | Melter sidewall, upper zone |
| Fused Cast AZS-41 | ZrO₂ ≥ 41% | ≥ 4.0 | <1% | 1,700 °C | Melter bottom, throat |
| Fused Silica Brick | SiO₂ ≥ 99% | 1.85–1.90 | ~22% | 1,650 °C | Crown / arch |
| Chrome Corundum Brick | Al₂O₃ + Cr₂O₃ ≥ 90% | 3.40–3.60 | <5% | 1,650 °C | Breast wall, port area |
| Zircon Brick | ZrSiO₄ ≥ 65% | 3.60–3.75 | <12% | 1,600 °C | Forehearth, channel |
| High Alumina Brick | Al₂O₃ ≥ 75% | 2.60–2.75 | <18% | 1,550 °C | Regenerator checker bricks |
| Sillimanite Brick | Al₂O₃·SiO₂ ≥ 85% | 2.40–2.60 | <18% | 1,600 °C | Regenerator checker bricks |
| Zirconium Refractory Mortar | ZrO₂ content matched | - | - | 1,650 °C | All AZS joints & sealing |
| AZS Ramming Mass | ZrO₂ ≥ 35% | - | - | 1,650 °C | Hot repair, gap filling |
CUSTOMER CASE STUDIES
| ★ CASE STUDY FUYAO GROUP China's largest automotive glass manufacturer The world's second-largest automotive glass manufacturer |
Customer · Fuyao Glass Industry Group Co., Ltd. Furnace Type · Float glass furnaces (multiple units) Products Supplied · Fused Cast AZS-41 (melting tank bottom blocks, throat) · AZS-36 (melting tank sidewalls) · AZS-33 (refining tank) · Zirconium Refractory Mortar Scope · Comprehensive refractory material supply + technical consultation on material selection + 3D furnace layout drawings Result · Long-term strategic supplier relationship. DZR's AZS-41 exceeds national standards (bulk density ≥ 4.0 g/cm³), supporting Fuyao's high-volume, continuous float glass production requirements with consistent quality verified by CMA-accredited laboratory reports. |
Global Track Record
| Region | Country | Products | Application |
| Southeast Asia | Vietnam · Thailand | AZS-41,AZS-36,Fused Silica | Float glass furnace - full zone material supply |
| Middle East | Egypt · Turkey | AZS-33,AZS-36,Zircon Brick | Melter sidewall, refiner, forehearth |
| South Asia | India · Indonesia | AZS-41,High Alumina,Sillimanite | Melter bottom, regenerator checker bricks |
| Europe / Others | Russia · 30+ countries | AZS-33/36/41,Monolithics | Full-furnace material packages with 3D drawings |
FREQUENTLY ASKED QUESTIONS
Q1: What is the difference between AZS-33, AZS-36, and AZS-41 for float glass furnaces?
The number refers to ZrO₂ content - the higher the ZrO₂, the better the resistance to glass corrosion. Use AZS-41 for the melter bottom and throat (most aggressive zones), AZS-36 for main melter sidewalls, and AZS-33 for the refiner and working end where corrosion is less severe. DZR AZS-41 bulk density ≥ 4.0 g/cm³ - verified above national standard by CMA-accredited lab.
Q2: Can DZR supply all refractory materials for a complete float glass furnace?
Yes. DZR is a full-zone refractory supplier. We supply AZS blocks (33/36/41), fused silica crown bricks, chrome corundum bricks, zircon bricks, high alumina and sillimanite checker bricks for regenerators, alumina bubble insulation bricks, and a complete range of monolithic refractories - mortars, ramming masses, and castables. One supplier, complete furnace coverage.
Q3: What quality certifications do DZR products carry?
DZR AZS blocks are European-certified and hold the national 'Quality Products for Glass Furnace Industry' certification. Every shipment is accompanied by a CMA-accredited laboratory test report covering ZrO₂ content, bulk density, apparent porosity, cold crushing strength, and other key parameters.
Q4: Do you provide technical support for material selection and installation?
Yes. Our engineering team provides zone-by-zone material selection guidance, 3D furnace assembly drawings with position-coded brick packages, and on-site installation supervision. We support new furnace commissioning, scheduled cold repair, and emergency hot repair.
Q5: How quickly can I receive a quotation?
Please provide your furnace type, required zones, and estimated quantities. Standard quotation requests are responded to within 24 hours. Custom specifications or large-scale projects are typically quoted within 48–72 hours.
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