燃料化学学报2017，Vol.45Issue(11)：1317-1322,6.
生物质与烟煤混合灰熔融特性影响因素的研究
Influence factors for fusion characteristics of mixed ash between biomass and bituminous coal
摘要
Abstract
Effects of atmosphere, mixing ratio and residue carbon on ash fusion characteristics of biomass and bituminous coal were investigated. The pine sawdust ash was mixed with Wuhai bituminous coal ash at different mass ratios. The ash fusion temperatures ( AFTS) of the mixed ash in different atmospheres were determined by ash-melting point measuring device. X-ray diffraction ray was used to investigate the reason for AFTs variation from the perspective of minerals evolution. The result shows that AFTs of mixed ash in weak reducing atmosphere is lower than that in oxidizing one due to formation of fayalite and hercynite. In addition, the difference in AFTs under reducing and oxidizing atmosphere is related to the content of Fe in the mixed ash. The increment of pine sawdust ash favors generation of gehlenite, akermanite and leucite ect. , which can be classified as low temperature eutectics and help to reduce the AFTs of mixed ash. Moreover, the AFTs of the mixed ash increase initially and decrease afterwards and then increase again with the increment of residue carbon content in coal ash, due to formation of Fe-C eutectic (FexCy), local reducing atmosphere and skeleton action of residue carbon.关键词
生物质/混合灰/灰熔融特性/残炭/矿物质演变Key words
biomass/mixed ash/ash fusibility characteristics/residue carbon/mineral evolution分类
化学化工引用本文复制引用
任俊斌,李俊国,张永奇,王志青,李风海,房倚天..生物质与烟煤混合灰熔融特性影响因素的研究[J].燃料化学学报,2017,45(11):1317-1322,6.基金项目
The project was supported by the National Natural Science Foundation of China (21506242, 21676289).国家自然科学基金(21506242, 21676289)资助 （21506242, 21676289）
