摘要
用X射线衍射、甘油–无水乙醇法和红外测试分析手段探讨和分析煅烧前后的煤矸石矿物组成的变化。实验发现:不同产地的煤矸石大都含有高岭石和白云母等黏土矿物。煤矸石增钙煅烧后,在850～950℃含有低温水硬活性矿物Ca12A114O33和Ca2SiO4。随着温度升高,石英晶体发生晶格畸变,CaO特征峰强度减弱。惰性Ca2Al6SiO16和CaSiO3的生成导致煤矸石活性下降。复合掺杂F–和[SO4]2–可有效破坏网络骨架的结晶度,生成不稳定的中间相,降低体系的共熔点。
X-ray diffraction, glycerol-ethanol treatment and Fourier transform infrared were applied to investigate mineral composition variation of coal gangue and analyze the mechanism of the variation. The experiments show that coal gangue from all the different regions contains the clay minerals kaolinite and muscovite. After calcination with calcium, coal gangue contains low-temperature and hydraulic-activity minerals （Ca12Al14O33 and Ca2SiO4） at 850-950℃ .-As the temperature increases, crystal quartz decreases, the intensity of the CaO characteristic apex falls and inert Ca2Al6SiO16 and CaSiO3 are made, which causes coal gangue activity to decrease. In the gypsum-fluorite compound mineralizer system, F^- and [SO4]^2- efficiently destroy the crystal degree of the framework, unstable materials appear, and then the melting point is decreased.
出处
《硅酸盐学报》
EI
CAS
CSCD
北大核心
2006年第7期855-860,共6页
Journal of The Chinese Ceramic Society
基金
"973"计划(2001CB610703)
南京工业大学博士学位论文创新基金(BSCX200502)资助项目
关键词
矿物组成
煅烧
煤矸石
mineral composition
calcination
coal gangue
