CAJ | 학술논문

选用高Ca、高Fe含量的神华煤，在沉降炉系统中进行空气以及O2/CO2燃烧实验。利用X射线荧光探针（XRF）、X射线衍射仪（XRD）、先进计算机控制扫描电镜（CCSEM）分别对总灰元素、晶相组成以及主要矿物元素的共生特性进行深入表征。结果表明氧/燃料燃烧促进了 Fe、Ca 与其他矿物元素的交互反应，总灰中 Fe 在Fe-rich类矿物分布减少，而在铁铝硅酸盐（Fe-alsil），尤其是在Fe与Ca发生交互反应的Fe+Ca类矿物的分布增加，同时Ca也存在类似的分布规律。对总灰中Fe+Ca类矿物深入分析发现，氧/燃料燃烧条件下总灰中Fe+Ca类矿物结渣倾向更严重（Fe2O3/CaO摩尔比为0.5～3）。
선용고Ca、고Fe함량적신화매，재침강로계통중진행공기이급O2/CO2연소실험。이용X사선형광탐침（XRF）、X사선연사의（XRD）、선진계산궤공제소묘전경（CCSEM）분별대총회원소、정상조성이급주요광물원소적공생특성진행심입표정。결과표명양/연료연소촉진료 Fe、Ca 여기타광물원소적교호반응，총회중 Fe 재Fe-rich류광물분포감소，이재철려규산염（Fe-alsil），우기시재Fe여Ca발생교호반응적Fe+Ca류광물적분포증가，동시Ca야존재유사적분포규률。대총회중Fe+Ca류광물심입분석발현，양/연료연소조건하총회중Fe+Ca류광물결사경향경엄중（Fe2O3/CaO마이비위0.5～3）。
Shenhua coal, with high concentration of Ca and Fe, was subjected to combustion in the drop tube furnace (DTF) in both air and O2/CO2 atmosphere. XRF, XRD and CCSEM were used to characterize elemental composition, mineralogy and element symbiotic properties of bulk ash. Oxy-fuel combustion promoted interaction of Fe and Ca with other minerals. However, the amount of Fe distributed in iron aluminosilicate (Fe-alsil), especially in Fe+Ca minerals increased. The same distribution tendency of Ca was observed. Further analysis found that Fe+Ca mineral in oxy-fuel combustion bulk ash had more serious slagging propensity (with Fe2O3/CaO mole ratios 0.5—3) than that in air combustion bulk ash.