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<p>Low-cement bonded corundum-spinel refractory castables were fabricated by incorporating 1–3 wt% yttrium-stabilized zirconia (t-YSZ) powder into a mixtrue of sintered corundum, magnesia-alumina spinel, and calcium hexa-aluminate as primary raw materials, with pure calcium aluminate cement as the binder. The impact of lime rotary kiln slag on the corrosion behavior of the castables was investigated. The results demonstrate that increasing the t-YSZ powder content leads to an increase in bulk density, a gradual decrease in apparent porosity, and a 30% enhancement in mechanical strength. Among the samples, the one containing 2 wt% t-YSZ micro-powder exhibited the best corrosion resistance and permeability. The formation of ‘dendritic’ calcium aluminate in the corrosion layer effectively mitigated slag-induced damage to the castable, while the micropores within the matrix provided significant absorption of the slag. Additionally, the t-YSZ particles, enveloped by the slag, inhibited its penetration, thereby improving the castables corrosion resistance.</p>

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Alkali corrosion resistance mechanism of yttrium stabilized zirconia reinforced corundum-spinel castables

  • 期刊论文

  • 发表日期：

    2026年4月24日

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  • Zhiyang He,
  • Han Zhang,
  • Pengda Zhao,
  • Fusuo Hao,
  • Huizhong Zhao

摘要

Low-cement bonded corundum-spinel refractory castables were fabricated by incorporating 1–3 wt% yttrium-stabilized zirconia (t-YSZ) powder into a mixtrue of sintered corundum, magnesia-alumina spinel, and calcium hexa-aluminate as primary raw materials, with pure calcium aluminate cement as the binder. The impact of lime rotary kiln slag on the corrosion behavior of the castables was investigated. The results demonstrate that increasing the t-YSZ powder content leads to an increase in bulk density, a gradual decrease in apparent porosity, and a 30% enhancement in mechanical strength. Among the samples, the one containing 2 wt% t-YSZ micro-powder exhibited the best corrosion resistance and permeability. The formation of ‘dendritic’ calcium aluminate in the corrosion layer effectively mitigated slag-induced damage to the castable, while the micropores within the matrix provided significant absorption of the slag. Additionally, the t-YSZ particles, enveloped by the slag, inhibited its penetration, thereby improving the castables corrosion resistance.