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Fe2O3含量对高硫型硫铝酸盐水泥熟料烧成的影响
作者：兰明章1，张巧伟1，聂松1，瞿海洋2，王剑锋1
（1.北京工业大学 材料科学与工程学院，北京 100124；2.中建材中岩科技有限公司，北京 100024）
摘要：采用化学试剂配制了5组不同Fe2O3含量的高硫型硫铝酸盐水泥生料，在1225~1425 ℃下保温煅烧，得到相应的水泥熟料，通过观察熟料外观形貌、利用XRD和BSE-SEM测试，研究了Fe2O3含量对水泥熟料煅烧和矿物组成的影响。结果表明：熟料中铁相的矿物组成更接近于C6AF2；在CaO-SiO2-Al2O3-Fe2O3-SO3系统中，随着Fe2O3含量的增加，系统熔点降低；适量的铁相可以促进水泥熟料的早期水化。
关键词：Fe2O3含量；高硫型；硫铝酸盐水泥；熟料煅烧
中图分类号：TU525；TQ172.72+7 文献标识码：A 文章编号：1001-702X（2019）06-0028-05
Effect of Fe2O3 content on the sintering process of high sulfur sulfoaluminate cement clinker
LAN Mingzhang1，ZHANG Qiaowei1，NIE Song1，QU Haiyang2，WANG Jianfeng1
（1.College of Materials Science and Engineering，Beijing University of Technology，Beijing 100124，China；
2.CNBM Zhongyan Technology Co. Ltd.，Beijing 100024，China）
Abstract：Five groups of high-sulfur type sulphoaluminate cement raw meals with different Fe2O3 content were prepared using chemical reagents. Insulation and calcination at different temperatures from 1225 to 1425 ℃ to obtain the corresponding cement clinkers. The calcination of cement clinker as well as the influence of Fe2O3 content on clinker composition and structure were also studied by observing the morphology of clinkers，using XRD and BSE-SEM test methods. Results show that the mineral composition of the iron phase in clinker is closer to C6AF2. In the CaO-SiO2-Al2O3-Fe2O3-SO3 system，the melting point of the system decreases with the increase of the content of iron phase. The proper amount of Fe phase can promote the early hydration of cement clinker.
Key words：Fe2O3 content，high sulfur type，sulphoaluminate cement，clinker calcination