摘要
研究了颗粒大小、气氛和残碳含量对霍林河褐煤灰熔融特性的影响,在探讨灰成分变化的基础上,对霍林河煤灰在不同温度下的矿物组成进行了XRD分析.结果表明,灰熔点随颗粒的增大而减少是由于灰中总碱量由小到大引起的;不同气氛导致的灰熔点变化是由于弱还原气氛下方铁矿在熔融过程中与钙长石和钙黄长石反应生成了铁尖晶石和铁橄榄石等低熔点物质引起的;残碳含量导致灰熔点的变化是因为Fe3C的生成引起灰熔点的升高,灰锥内局部还原性气氛的形成使灰熔点降低、残碳的"骨架"作用导致灰锥不易变形而使灰熔点升高.
The effects of particle sizes,atmosphere condition and residual carbon content on the melting characteristics of Huolinhe lignite ash was investigated.Based on the discussion of the change of ash compositions,the variation of the compositions of mineral under different temperatures was employed by XRD.Results shows that the change of ash melting point （AMP） caused by particle size is due to the variation of total alkali content in ash; the modification of AMP in different atmospheres results from the generation of fayalite and hercynite,which come from the reactions between the wustite and gehlenite,anorthite; the difference of AMP caused by residual carbon content is the result of the formation of Fe3C,reducing atmosphere and the ＂skeleton＂ of residual carbon within the ash cone.
出处
《煤炭转化》
CAS
CSCD
北大核心
2010年第4期9-13,共5页
Coal Conversion
基金
国家重点基础研究发展计划(973)项目(2006JQ11131)
国家高技术研究发展(863)项目(2007AA050302)
中国科学院知识创新项目(KGCX2-YW-320)
关键词
霍林河褐煤
熔融特性
影响因素
Huolinhe lignite
melting characteristics
effecting factors
