摘要
华能南京电厂不同粒径粉煤灰的化学成分和矿物相组成基本相同。煤粉所含矿物质在高温燃烧过程中的挥发—凝聚作用，导致微量元素趋向在细粒径粉煤灰中富集，其富集的程度则与粉煤灰的平均粒径和元素的地球化学性质密切相关。粉煤灰排放的环境效应表明，尤以细粒径灰粒的影响最大。
The major chemical compositions and mineral phases are alike in the particles of powder fly ash with different sizes from Huaneng Nanjing Power Plant.The volatilization-condensation of the minerals of powdery coal in high temperature combustion results in that the trace elements tend to enriching in smaller particles of powder fly ash,and the degree of enrichment of trace elements is closely related to their geochemical properties and the average particle size of fly ash.The smaller particles are most serious for the environmental effect of powder fly ash disposal.
出处
《地球化学》
CAS
CSCD
北大核心
1997年第3期73-78,共6页
Geochimica
基金
江苏省自然科学基金
关键词
粉煤灰
微量元素
粒径分布
环境影响
发电厂
powder fly ash,trace element,size distribution,environmental effect
