【作者】 熊金钰； 赵东升； 徐翔翔；

【Author】 XIONG Jin-yu;ZHAO Dong-sheng;XU Xiang-xiang;School of Chemical Engineering,Anhui University of Science and Technology;

【机构】 安徽理工大学化学工程学院；

【摘要】 煤的结渣性对煤的利用效率具有重要影响。本文以高灰熔融点煤（LZ煤、BD煤、YG煤）为研究对象,测其结渣性,并分析灰渣的矿物组成和显微结构,以探讨结渣性与矿物组成之间的联系。结果表明:三个煤样结渣强度顺序为:YG>BD>LZ。灰熔点相近的高灰熔点煤,在其主要成分（SiO₂,Al₂O₃,CaO,MgO）含量相近的情况下,Fe2O3含量增加,结渣性增强。XRD分析结果显示:结渣率最大的YG煤灰渣中的主要成分除石英、莫来石、钙长石,还有铁镁辉石。SiO₂、Fe₂O₃含量增加,有利于形成低熔点化合物及共晶体,在一定范围内有利于结渣。灰渣的显微结构暗示结渣性最强的YG煤渣中残留未完全燃烧的碳,结渣降低了煤炭利用率。更多还原

【Abstract】 Slag-clinkering property of coal has an important influence on coal utilization efficiency.The three high ash-fusion-temperature coals（LZ coal,BD coal and YG coal） were used to study the relation between slag-clinkering property and mineral composition.The slag clinkering property of the three coal samples was tested,and the mineral composition and microstructure of the coal slag were analyzed.The experimental results show that the slag-clinkering tendency of the three coals is YG>BD>LZ.For high ash-fusion-temperature coal with similar fusing point and similar content of main constituents（SiO₂,Al₂O₃,CaO,MgO）,the content of Fe₂O₃ increases,and the slag-clinkering tendency is strengthened.From XRD patterns of the slag,it is found that there are quartz,mullite,anorthite and ferrosilite magnesian in YG coal slag with highest slag-clinkering percentage.The increase of the content of SiO₂ and Fe₂O₃ is favorable for slag-clinkering due to the formation of low-temperature eutecticum to some extent.The microstructure of YG coal slag with highest slag-clinkering percentage indicates that the strong slag-clinkering behavior can capture residual carbon so that the coal utilization efficiency is decreased.更多还原