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应用带能谱的扫描电镜(SEM-EDX)、X射线衍射(XRD)、X射线荧光(XRF)等方法研究了桂中合山煤田合山组灰分小于50%的煤层样品矿物组成、常量和微量元素的地球化学特征.结果表明:合山煤中全硫含量在5.3%~11.6%之间,与惰质组相比,有机硫更易在镜质组中富集;合山煤中的矿物有石英、方解石、白云石等,并有少量的白铁矿、伊/蒙混层黏土矿物、红磷铁矿等,结合电镜观察,认为这些矿物主要形成于泥炭堆积压实前的同生作用;同世界煤相比,W,U,Mo,Cr,V,Zr明显富集.根据微量元素同常量元素、灰分和硫分的相关性,将微量元素分为5种结合态.
The mineral composition, constants and the chemical composition of the coal seam samples with less than 50% ash content in the Hesha Formation of the Heshan coal field in the Heshan coal field of Guangxi were studied by SEM-EDX, XRD and XRF. The results show that the content of total sulfur in Heshan coal is between 5.3% ~ 11.6%, and organic sulfur is more likely to be enriched in vitrinite than that of inertinite. The contents of minerals in Heshan coal There are quartz, calcite, dolomite, etc., and a small amount of white iron ore, Iraq / Mongolia mixed clay minerals, red phosphorus iron ore, combined with electron microscopy, that these minerals mainly formed in the peat accumulation before compaction symbiotic role; Compared with the world coal, W, U, Mo, Cr, V and Zr are obviously enriched.According to the correlation between trace elements and major elements, ash and sulfur, the trace elements are divided into five kinds of bound states.