Abstract:

In order to ascertain the geochemical features of trace elements in the No.5 coal seam at Junger Coalfields Chuancaogedan Coal mine, the mineral composition characteristics were observed through optical microscope, SEM and the Xray Diffraction (XRD) method, the contents of trace elements in coal were determined by Inductively Coupled Plasma Mass Spectrometry (ICPMS), and the occurrence of trace elements were then analyzed based on statistics. The results show that the contents of Li, Be, F, U, Hg in the No.5 coal seam is higher than that in the No.6 coal and Chinese coal. Li, F, Ga, Se are strong inorganic affinity elements, Be, As, U are organic affinity elements, and Hg is of significant positive correlation with sulfur content. Organic combination, inorganic compounds and sulfide bonded forms are the dominant occurrences of these trace elements in the No.5 coal.

Key words: coal, trace elements, geochemical features, Junger Coalfield