煤中微量元素在分选过程中迁移规律研究进展

摘要

通过分析煤中微量元素的赋存状态和分布特征，得出煤中微量元素的赋存分布方式是多因素多期作用的结果，其分布规律与煤的种类、煤化程度、煤显微组分、粒度大小等有关。通常的物理分选对大多数微量元素都具有一定的脱除效果，各个分选产品中微量元素的脱除和富集规律不同。针对目前煤中微量元素在分选过程中存在的问题，对今后的研究方向进行了阐述。%There are many kinds of trace elements in coal. The paper analyzed the modes of occurrence and distribution regularity of trace elements, and found that their modes of occurrence are the result of many factors, which has comlex relations with coal types, coal ranks, coal macerals, the particle size and so on. Usually the physical separations have certain removal effect on most trace elements, the remov- al and enrichment regularity of trace elements in various products after separation are different. According to the problems existing in the present coal separations, the author put forward that some aspects should be strengthened and several problems should be solved.