-95-第46卷第3期非金属矿Vol.46No.32023年5月Non-MetallicMinesMay,2023粉磨煅烧次序对煤系偏高岭土胶凝性能的影响张凯丰1杨雨玄1刘文欢1李辉1,2,3*（1西安建筑科技大学材料科学与工程学院，陕西西安710055；2生态水泥教育部工程研究中心，陕西西安710055；3陕西省生态水泥混凝土工程研究中心，陕西西安710055）摘要利用微波可对物料内外整体加热的特性，将破碎后煤系高岭岩先经微波煅烧后再磨细处理（先烧后磨），制备煤系偏高岭土。以煤系偏高岭土的活性Si、Al溶出率和微观结构形貌，以及煤系偏高岭土制备的胶砂试样的活性指数、力学和工作性能为评价指标，研究粉磨与煅烧次序对煤系偏高岭土胶凝性能影响。结果表明，当微波煅烧温度为650℃，煅烧时间为15min时，采用“先磨后烧”和“先烧后磨”工艺制备的煤系偏高岭土，活性Si、Al溶出率分别为51.22%、80.90%和53.2%、80.75%，活性指数分别为92%和98%，28d抗压强度分别为50.4MPa和53.6MPa，28d抗折强度分别为7.6MPa和7.8MPa，胶砂流动度分别为158mm和186mm。“先烧后磨”制备的煤系偏高岭土颗粒粒径分布更细，结构更致密。关键词微波煅烧；煤系高岭岩；辅助性胶凝材料中图分类号：P619.23+2;TU528文献标志码：A文章编号：1000-8098(2023)03-0095-05EffectofGrindingandCalcinationSequenceonCementitiousPropertiesofCoal-BasedMetakaolinZhangKaifeng1YangYuxuan1LiuWenhuan1LiHui1,2,3*(1SchoolofMaterialsScienceandEngineering,Xi’anUniversityofArchitectureandTechnology,Xi’an,Shaanxi710055;2EcologicalCementEn-gineeringResearchCenteroftheMinistryofEducation,Xi’an,Shaanxi710055;3ShaanxiEcologicalCementConcreteEngineeringResearchCenter,Xi’an,Shaanxi710055)AbstractInthispaper,coal-basedmetakaolinwaspreparedbyusingthecharacteristicsofmicrowavetoheattheentirematerialinsideandoutside.Thecrushedcoal-basedkaolinwasfirstcalcinedbymicrowaveandthenfinelyground("calciningbeforegrinding").Theeffectsofgrindingandcalcinationsequenceonthecementitiouspropertiesofcoal-basedmetakaolinwerestudiedbyusingtheactiveSi/Aldissolutionrateandmicrostructuremorphologyofthemetakaolin,andtheactivityindex,mechanicsandworkabilityofthesamplespreparedwithcoal-basedmetakaolinasevaluationindicators.Theresultsshowedthatwhenthemicrowavecalcinationtempe...
