在沉降炉中进行了准东煤的燃烧实验,利用计算机控制扫描电镜技术(computer controlled scanning electron microscopy,CCSEM)研究了煤中矿物质的转化行为。研究表明煤中主要矿物为方解石、高岭石、含铁类物质以及未分类矿物,燃烧后灰中石英、铁的氧化物、白云石的含量急剧增加,未分类矿物和方解石的含量下降。同时对3种重要致渣元素Na、Fe、Ca在燃烧前后的矿物转化行为及颗粒粒径分布进行了详细研究。
【英文摘要】
The mineralogy of Zhundong coal and its combustion-generated particles were characterized in detail by computer controlled scanning electron microscopy(CCSEM). The experiment was done on a lab-scale drop tube furnace. The results showed that there were calcite, kaolinite, pyrite, pyrrhotite, oxidized pyrrhotite and unclassified minerals in Zhundong coal. The mass fraction of quartz, iron oxide and dolimite increased sharply, while the mass fraction of calcite and unclassified minerals decreased. Also, the b...
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