CAJ | 학술논문

借助高温热台显微镜、扫描电子显微镜-能谱仪、灰熔点仪和 X 射线衍射仪考察了添加稻草和棉秆两种秸秆对长平煤灰熔融特性的影响。研究结果表明添加两种秸秆都能有效地降低长平煤灰的熔融温度。在高温弱还原性气氛下，长平煤灰主要矿物组成为耐熔性石英和莫来石，而添加秸秆后产生了白榴石、尖晶橄榄石、钙长石等低温共熔化合物，使长平煤灰熔点降低。不同灰的高温熔融图像表明，煤灰在熔融过程中由于受热而使固相持续软化，形成了不利于难熔物分解的高黏度熔体。而煤和稻草的混合灰在熔融时形成了易发生流动的低黏度熔体，能够促进矿物质发生反应而更易熔融。
차조고온열태현미경、소묘전자현미경-능보의、회용점의화 X 사선연사의고찰료첨가도초화면간량충갈간대장평매회용융특성적영향。연구결과표명첨가량충갈간도능유효지강저장평매회적용융온도。재고온약환원성기분하，장평매회주요광물조성위내용성석영화막래석，이첨가갈간후산생료백류석、첨정감람석、개장석등저온공용화합물，사장평매회용점강저。불동회적고온용융도상표명，매회재용융과정중유우수열이사고상지속연화，형성료불리우난용물분해적고점도용체。이매화도초적혼합회재용융시형성료역발생류동적저점도용체，능구촉진광물질발생반응이경역용융。
The effects of rice straw (DC) and cotton stalk (MG) addition on Changping (CP) coal ash melting characteristics were studied with high-temperature optical microscopy, scanning electron microscopy coupled with energy dispersive spectrometer (SEM-EDS), standard ash fusion temperature (AFT) tests and X-ray diffraction (XRD) analyses. The AFT of CP coal could be reduced effectively by adding both agricultural residues. In weak reducing atmosphere at high temperature, refractory mullite and quartz were main minerals of CP coal ash. The presence of agricultural residues could form low melting eutectic minerals, such as leucite, ringwoodite and anorthite, decreasing the AFT of CP coal. High temperature images of ash particles showed that CP coal ash fusion behavior was prolonged softening and subsequent melting of solid phases that resulted in sluggish flow and depressed dissolution of the refractory constituents. However, during the melting process of DC blended CP coal ash, active melts with low viscosity that could promote the reaction between the minerals and quickly dissolve the residual refractory were formed.