大同煤田太原组5号煤层化学元素赋存特征

发布时间：2018-02-26 20:34

本文关键词： 常量元素痕量元素赋存状态环境意义　出处：《煤炭科学技术》2016年S1期 　论文类型：期刊论文

【摘要】：采用X射线荧光光谱法(XFS)、电感耦合等离子质谱(ICP-MS)、X射线衍射法(XRD)、光学显微镜观测和多元数理统计等方法测定和分析了大同煤田太原组5号煤层17个分层煤样中8种常量元素和痕量元素Mn、Cu、As、Pb的含量分布和赋存特征。结果表明:5号煤常量元素Al、Si、K、Ti是构成陆源碎屑物质黏土矿物的主要部分,Fe、Ca分别以黄铁矿和方解石的形式存在,Mg、P分别以碳酸盐矿物和磷酸盐矿物的形式存在;痕量元素Cu、Pb主要是赋存于黏土矿物晶格中,As、Mn元素主要赋存于黄铁矿中。古地质环境和海水入侵对Fe、Ca、As、Mn、Mg及P元素的后生作用明显。煤中有害元素Mn、Cu、As和Pb主要赋存在矿物中,可以合理利用底灰,提高除尘率和通过煤炭分选技术来降低对环境的危害。
[Abstract]:Eight kinds of 17 stratified coal samples from No. 5 seam of Taiyuan formation in Datong coalfield were determined and analyzed by X-ray fluorescence spectrometry, inductively coupled plasma mass spectrometry (ICP-MS) X-ray diffraction, optical microscope observation and multivariate mathematical statistics. The content distribution and occurrence characteristics of constant element and trace element MnCU Cu As-Pb. The results show that the major element of No. 5 coal, Alo Si-K ~ (+) Ti, is the main part of the clay mineral of continental clastic material, and there exists MgP in the form of pyrite and calcite, respectively, in the form of pyrite and calcite, respectively, in the form of pyrite and calcite, respectively, in the form of pyrite and calcite, respectively. In the form of carbonate and phosphate minerals; The trace element Cu ~ (2 +) Pb is mainly located in the lattice of clay minerals, and the elements of asmonium mn are mainly located in pyrite. The paleogeological environment and seawater intrusion have obvious epigenetic effects on the elements of Fe _ (2) Ca ~ (2 +) as and P, and the harmful elements of mn ~ (2 +) Cu ~ (2 +) as and Pb in coal are mainly found in minerals. The bottom ash can be used reasonably, the dust removal rate can be increased and the environmental hazard can be reduced by coal separation technology.
【作者单位】：太原理工大学;煤与煤系气地质勘查山西省重点实验室;
【基金】：国家自然科学基金资助项目(41372164)
【分类号】：P618.11

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