煤品质变化及有害元素迁移的研究进展

Research progress on coal quality changes and migration of harmful elements

为了探明煤炭在转移、储存过程中品质指标(如水分、灰分、发热量)的波动以及煤中有害元素在煤炭周转、利用过程中的迁移和转化,综述了目前国内外煤炭物流、存储中品质变化的研究进展,对煤中有害元素迁移的相关研究进行梳理。结果表明:煤炭在物流环节中品质指标会出现一定范围的波动,影响了煤炭的生产和销售;煤中有害元素在煤炭周转、利用过程中发生迁移和转化,造成了严重环境污染;事前控制,即煤炭分选,在提高煤热值,降低了煤中硫分、灰分的同时,有效脱除了微量有害元素;明确煤质变化的规律,探究煤中微量有害元素迁移的原理和规律,有利于煤炭的合理开发、环境质量的有效控制。

In order to investigate the fluctuation of coal quality indicators such moisture,ash and calorific value as well as the migration and transformation of harmful elements during coal transportation and storage,the research progress on coal quality changes and harmful elements migration at home and abroad were introduced.The results showed that the coal quality changes lowered the coal properties and the migration of harmful elements polluted the environment.Coal preparation could improve the calorific value of coal and removed the sulfur and ash obviously.The research should focus on the migration rule and principle of harmful elements.