State Key Laboratory of Coal Combustion,Huazhong University of Science and Technology

为了研究煤中铀、灰中铀在煤燃烧过程中的赋存形态,以减少煤炭利用过程中所释放出的放射性物质铀对环境造成的危害,对煤中铀及灰中铀的含量、分布特征、赋存形态、浸取特性,以及铀在煤燃烧过程中的富集规律和环境效应等方面的研究成果进行了归纳和总结,并对相关数据进行整理和分析。结果表明:我国煤中铀的含量整体接近于世界平均水平,且主要以有机质结合形式存在(部分煤中有机态铀含量高达70%90%),铀在煤燃烧过程中主要富集于细颗粒飞灰表面。最后对煤燃烧过程中铀的迁移规律和转化机理进行了初步探讨,并提出了今后有关煤中铀的研究方向与重点。

in order to stody the ocurence of uranum in coal and ash.and to reduce the release of radioactive mater al during the process of coal uliization.,the research ituation of uranium in coal as bee reviewed in ths paper.which including the conents distrbuton.,mode of ocurence and leaching characeistios of uraniumin coal and ash.as wol as enrchment characterstics during cal combustion and the enwironmenaleicts are detaled.Theresuis show that uranium concentration inChinese coal in overll lose to the word average ,and mainl in organic matters( even as high as 70%90% in some samples ,Uraniumn usall enmi hed in ine parit esof fy ash during coal combustion.Finally.the migration and 'ransformation mechanism of uranium during cal combusion is discusse in this pape: and put forwards reserch orientation and emphasis.

国家重点基础研究发展计划(973计划)资助项目(2014CB238904)；