Abstract To substitute bauxite-SiC refractories which are currently used in transition zone of cement kilns, this paper aims to fabricate novel working lining with lower thermal conductivity and outstanding abrasion resistance. For this purpose, a composite refractory material, based on the incorporation of zircon and fused zirconia-mullite (FZM) into bauxite-based refractories is fabricated. The addition of both zircon and FZM led to superior thermal insulation performance despite their different abrasion behaviours. In particular, specimen containing zircon possesses lower cold crushing strength and accordingly inferior abrasion resistance, as compared to bauxite-SiC refractories. By comparison, incorporation of FZM powder resulted in the best abrasion resistance, as it is related to the improved fracture toughness which retard the propagation of crack, thereby preventing the material form spallation. ZrO 2 -containing bauxite refractories can be promising materials to satisfy the new request of cement rotary kilns.

中文翻译：

---

水泥窑过渡带含ZrO 2 铝土矿耐火材料的耐磨性和热导率

摘要 为替代目前水泥窑过渡区使用的铝土矿-碳化硅耐火材料，旨在制造具有较低导热系数和优异耐磨性的新型工作衬。为此，基于将锆石和电熔氧化锆莫来石 (FZM) 掺入铝土矿基耐火材料中，制造了一种复合耐火材料。尽管锆石和 FZM 具有不同的磨损行为，但添加锆石和 FZM 可实现卓越的隔热性能。特别是，与铝土矿-SiC 耐火材料相比，含有锆石的试样具有较低的冷压强度，因此耐磨性较差。相比之下，掺入 FZM 粉末可产生最佳的耐磨性，因为它与提高的断裂韧性有关，可以延缓裂纹的扩展，从而防止材料形成散裂。含ZrO 2 的铝土矿耐火材料是满足水泥回转窑新要求的有前景的材料。