The mineral transition, microstructure and self-pulverization as well as the Al2O3 leaching performance of calcium aluminate clinkers with different P additions in CaO?Al2O3?SiO2 system during high-temperature sintering were systematically studied by XRF, XRD, SEM?EDS and DSC?TG technologies. The clinkers sintered at 1350 ℃ mainly contain 12CaO·7Al2O3, CaO·Al2O3, β-2CaO·SiO2 and γ-2CaO·SiO2. The content of β-2CaO·SiO2 increases while the content of γ-2CaO·SiO2 decreases as the P addition increases. The self-pulverization property of clinkers deteriorates with increasing P addition. P distributes evenly in the clinkers, and inhibits the transformation of β-2CaO·SiO2 to γ-2CaO·SiO2. The cell volumes of 12CaO·7Al2O3 and CaO·Al2O3 decrease and increase respectively as the P addition increases, and P decreases their formation temperatures. The Al2O3 leaching rate of calcium aluminate clinkers decreases obviously with increasing P addition, which decreases form 95.01％ to 83.84％ as the P addition increases from 0 to 0.85％.%采用XRF、XRD、SEM?EDS和DSC?TG等技术手段研究不同P含量下铝酸钙熟料在高温烧结过程中的矿相转变、显微组织、自粉性能及其氧化铝浸出性能.1350℃下烧结熟料主要由12CaO·7Al2O3、CaO·Al2O3、β-2CaO·SiO2和γ-2CaO·SiO2等矿相组成;随着P含量的增加,β-2CaO·SiO2含量逐渐升高,而γ-2CaO·SiO2含量逐渐降低.熟料的自粉性能随着P含量的增加逐渐恶化.P在熟料中均匀分布,其存在抑制β-2CaO·SiO2向γ-2CaO·SiO2的转变.12CaO·7Al2O3和CaO·Al2O3的晶胞体积随着P含量的增加分别降低和提高,且P能降低铝酸钙化合物的形成温度.铝酸钙熟料的氧化铝浸出率随着P含量的增加明显降低,当P含量从0提高到0.85％时,氧化铝浸出率从95.01％降低到83.84％.
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