Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5483736 | International Journal of Coal Geology | 2017 | 13 Pages |
Abstract
The genetic type and mode of occurrence of elements in coal both exert a great impact on their removability; epigenetic and coarse minerals may be readily liberated by gravity separation. Elements associated with pyrite (e.g., As, Hg, Co, Ni, Cu, Se, Sb and Tl) demonstrate high removability; F, Th, U, V and Cr, which mainly occur in clay minerals and/or organic components of the coal, show a relatively low removability. Trace elements in particle size fractions 6-13Â mm and <Â 0.5Â mm are most easily removed by gravity separation. In order to fully remove toxic elements from coal, it is suggested fractions with particle sizes of 3-6Â mm and 0.5-3Â mm be reduced in size to <Â 0.5Â mm prior to gravity separation.
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Authors
Piaopiao Duan, Wenfeng Wang, Xiaohua Liu, Fuchang Qian, Shuxun Sang, Shaochun Xu,