煤矸石的表面活化对其微观结构和性能的影响
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  • 英文篇名:Effects of surface activation on the microstructure and performance of coal gangue
  • 作者:张若豪 ; 邓敏 ; 莫立武
  • 英文作者:ZHANG Ruohao;DENG Min;MO Liwu;State Key Laboratory of Materials-Oriented Chemical Engineering,College of Materials Science and Engineering,Nanjing Tech University;Jiangsu National Synergetic Innovation Center for Advanced Materials;
  • 关键词:煤矸石 ; 流态化煅烧 ; 表面活化 ; 水泥标准稠度用水量 ; 凝结时间
  • 英文关键词:coal gangue;;fluidized calcination;;surface activation;;water requirement of normal consistency of cement;;setting time
  • 中文刊名:NHXB
  • 英文刊名:Journal of Nanjing Tech University(Natural Science Edition)
  • 机构:南京工业大学材料科学与工程学院材料化学工程国家重点实验室;江苏先进生物与化学制造协同创新中心;
  • 出版日期:2019-03-15
  • 出版单位:南京工业大学学报(自然科学版)
  • 年:2019
  • 期:v.41;No.193
  • 基金:国家自然科学基金重点项目(51461135003);; 国家重点研发计划(2016YFB0303601)
  • 语种:中文;
  • 页:NHXB201902005
  • 页数:6
  • CN:02
  • ISSN:32-1670/N
  • 分类号:30-35
摘要
采用流态化煅烧对煤矸石粉料进行表面活化处理,研究煅烧温度和保温时间对煤矸石中高岭石脱水反应程度、煤矸石比表面积和微观结构的影响,测定掺30%煅烧煤矸石水泥的标准稠度用水量和凝结时间。结果表明:650、700、750和800℃下分别流态化煅烧1、2. 5和5 min时,煤矸石中高岭石分解率为3%~49. 8%,高岭石未完全转化成偏高岭石; 30%表面活化煤矸石使水泥标准稠度用水量提高2. 5%~5. 5%,而30%完全活化煤矸石使水泥标准稠度用水量提高9. 1%~16. 4%。
        The surface activation of coal gangue powder was carried out by fluidized calcination and the effects of calcination temperature and holding time on the mineral composition,the specific surface area and microstructure of surface-activated coal gangue were investigated. The water requirement of normal consistency and setting time of cements incorporated with 30% surface-activated coal gangue were measured. Results showed that kaolinite was completely converted into metakaolinite,and the decomposition of kaolinite was 3%-49. 8% when coal gangue powder was heated in suspended air at 650,700,750 and 800 ℃ for 1,2. 5 and 5 min. Compared with pure cement paste,the water requirement of normal consistencyof cement with 30% surface-activated and fully activated coal gangues was increased from 2. 5% to 5. 5% and 9. 1% to 16. 4%,respectively.
引文
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