As a glass plant engineer or procurement manager, you know that the right refractory choice can mean the difference between smooth operations and costly downtime. If your furnace is experiencing accelerated lining wear, frequent repairs, or unexpected shutdowns—your current alumina brick may not be optimized for your specific thermal and chemical conditions.
Both burned and fused alumina bricks share high purity (>90% Al₂O₃), but their manufacturing paths create very different microstructures:
Real-world performance? In one lab test by a European refractory institute, fused bricks showed 35% higher resistance to acid slag erosion over 200 hours at 1550°C—while burned bricks performed well under stable, moderate loads.
“After switching to fused alumina bricks in our float glass line, we reduced unplanned maintenance from 4 times/year to just once.”
— Plant Manager, China Glass Co.
Your decision shouldn’t be based on price alone—it should align with your furnace’s operating profile:
| Application Scenario | Recommended Brick Type | Expected Benefit |
|---|---|---|
| Stable temperature zone (<1600°C) | Burned Alumina | Cost-effective, good thermal shock resistance |
| High-temperature zone (>1650°C) or acidic slag exposure | Fused Alumina | Up to 40% longer life, minimal erosion |
| Frequent start-up/shutdown cycles | Burned Alumina | Better thermal fatigue performance |
If your furnace runs continuously at peak temperatures with aggressive slags—choose fused. If it's a mixed-use system where cost-efficiency matters more than extreme durability—burned might be your best bet.
Remember: choosing the wrong brick isn't just an expense—it’s a hidden productivity killer. One client saved over $250K annually after switching to fused alumina in their regenerator zones. That’s not just savings—it’s operational freedom.
What kind of furnace do you operate?
Temperature range? Slag type? Cycle frequency?
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