摘要
采用化学分步萃取、XRD和SEM-EDS、煤灰灰成分分析等测试方法对五彩湾煤中矿物质的赋存形态进行了研究,并对逐级萃取前后煤样的燃烧特性和灰熔融特性进行了分析和比较。结果表明,五彩湾煤中原始矿物质主要有方解石、硫酸钙、高岭石、石英、黄铁矿等;煤中钠含量很高,主要以水合离子的形态溶于煤的内水中;有机形态的钠、镁和钙提高了煤的燃烧特性;五彩湾煤的煤灰熔融性主要受铁钙物质的量比(F2O3/CaO)影响,灰熔融特性温度随铁钙物质的量比(F2O3/CaO)的增大而降低。
The existence form of minerals in Wucaiwan（WCW） coal were studied by extraction,XRD,SEM-EDX and ICP-OES. The influences of different forms of mineral on the combustion characteristics and the fusibility of ash were evaluated. The results indicate that the original minerals in WCW coal mainly include calcite,anhydrite,kaolinite,quartz and pyrite. The modes of occurrence of sodium in WCW coal are mainly in the form of water-soluble sodium. The organic bound sodium, magnesium and calcium can promote the combustion of coal to a certain extent. The fusibility of WCW coal ash is mainly influenced by the mol ratio of iron to calcium. The ash melting points decreases with increasing the Fe2O3/CaO mol ratio.
出处
《燃料化学学报》
EI
CAS
CSCD
北大核心
2015年第1期27-33,共7页
Journal of Fuel Chemistry and Technology
基金
国家科技部国际科技合作项目(2013DFG61490)
浙江省钱江人才项目(2013R10080)
关键词
五彩湾煤
赋存形态
燃烧特性
灰熔融性
Wucaiwan coal
existence form
combustion characteristic
fusibility of ash
