采用低温灰化、高温灰化、沉降炉燃烧和热重实验等方法,利用X射线衍射仪(XRD)和场发射扫描电镜结合X射线能谱仪(FSEM-EDX)对灰化灰、燃烧产物以及燃烧高铝煤电厂灰样的物理化学特征进行了详细的研究.结果表明:高铝煤中的铝质矿物主要是勃姆石和高岭石;高岭石高温脱水分解最后形成莫来石,勃姆石500℃时脱水形成γ-Al2O3,γ-Al2O3随着温度升高转化为θ-Al2O3,θ-Al2O3微晶在1010℃高温下开始熔融聚合形成α-Al2O3; θ-Al2O3微晶向α-Al2O3的转变对细颗粒的生成具有重要影响.
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