论文部分内容阅读
采用中子活化法测定了山东枣庄煤田晚古生代太原组高硫煤层中的微量元素质量分数 ,用数理统计方法取得了高硫煤中微量元素的浓度分布范围、平均值和变异系数 ,用逐步聚类分析法和相关分析法分析了微量元素的共生组合关系 ,并用扫描电镜 -能谱分析了不同煤岩组分的微量元素浓度 ,在此基础上结合形态硫分析结果和沉积相分析结果 ,讨论了高硫煤中微量元素的富集因素、聚集机理和成因背景 ,指出受海水影响的沼泽沉积环境不但对煤中形态硫的分布和含量有控制作用 ,同时对煤中微量元素的浓度和共生组合特点也有影响。太原组高硫煤中的微量元素按其成因可分成两组 ,一组是陆源碎屑富集型 ,其含量直接与煤中灰分产率呈正相关关系 ;另一组为盆地内部沉积 -生物作用富集型元素 ,海水的入侵和盆地介质的停滞还原条件和陆源碎屑物质输入量的减少最有利于沉积 -生物作用型元素的富集 ,并以有害元素 Cu、As、 U、 Pb、 Mo、 Sr和 Co的富集为特征。煤中黄铁矿及其他硫化物是许多有害元素的重要载体 ,充分凝胶化的富氢镜质体比其他组分承载和吸附有更多的有害元素。深入研究不同煤层的有害元素的有机亲和性有利于指导煤的合理利用和采用有效的有害元素的去除措施 ,以利于煤的有效和洁净利用
The trace element concentration in the late Paleozoic high-sulfur coal seam of Zaozhuang coalfield in Shandong was determined by neutron activation method. The concentration distribution, average value and coefficient of variation of trace elements in high-sulfur coal were obtained by mathematical statistics. We analyzed the symbiotic relationship of trace elements by the method of cluster analysis and correlation analysis, and analyzed the trace element concentration of different coal and rock components by scanning electron microscopy-energy spectrum. Based on the results of morphological sulfur analysis and sedimentary facies analysis, The enrichment factors, aggregation mechanism and genetic background of trace elements in high-sulfur coal indicate that the marsh depositional environment affected by seawater not only has a control effect on the distribution and content of sulfur in the coal, but also influences the concentration and symbiosis of trace elements in coal Portfolio features also have an impact. The trace elements in high-sulfur coal in Taiyuan Formation can be divided into two groups according to their genesis, one is enriched in terrigenous debris, the content of which is directly related to the ash content in coal and the other is sedimentary-biological effect in the basin Accumulation elements, seawater intrusion and stagnant reduction of basin medium and decrease of input of terrigenous clastic matter are most conducive to the enrichment of sedimentary-bio-active elements, and the harmful elements Cu, As, U, Pb, Mo , Sr and Co enrichment is characterized. Pyrite and other sulfides in coal are important carriers of many harmful elements. The fully gelated hydrogen-rich vitrinite carries and adsorbs more harmful elements than other components. Further study on the organic affinity of the harmful elements in different coal seams will help to guide the rational utilization of coal and remove the effective harmful elements so as to facilitate the effective and clean utilization of coal