High-alumina brick LZ-65 (Al₂O₃≥65%, refractoriness ≥1790℃) has a higher corundum/mullite phase ratio for stronger slag resistance, higher temperature rating and better hot load-bearing capacity.
| Al₂O₃ Content | ≥65% |
|---|---|
| Refractoriness | ≥1790℃ |
| Bulk Density | ≥2.45 g/cm³ |
| CCS | ≥70 MPa |
| RUL (0.2MPa) | ≥1520℃ |
High-alumina brick LZ-65 uses bauxite chamotte with Al₂O₃ ≥65%, refractoriness ≥1790℃ and bulk density ≥2.45 g/cm³. A higher corundum/mullite phase ratio gives superior hot load-bearing and slag resistance with minimal reheat change. It is Henan Songrui's premium high-alumina grade for BF bosh, upper hot blast stoves and other high-temperature critical zones.
Pair LZ-65 (hot zones) with LZ-55 (medium zones) for zoned selection balancing life and cost. Upgrade to mullite or corundum bricks for even higher temperatures.
Lay with high-alumina mortar, strict joint control; reserve expansion joints in hot load-bearing zones. Design and selection advice available.
Henan Songrui New Refractory Materials Co., Ltd. (Xuanhua Town Industrial Park, Henan) is a 2024 Class A taxpayer and SRDI SME. For selection, quotation or installation, contact Manager Zheng (17513376789 / 17513376789@163.com).
High-alumina brick LZ-65 (Al₂O₃≥65%) offers higher temperature and slag resistance:
Al₂O₃≥65%, service about 1550℃ for BF bosh, hot blast stove domes, EAF roofs.
Yes—higher Al₂O₃ means better slag resistance, suitable for stronger slag zones at higher cost.
Transition and early burning zones of rotary kilns.
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