不同类型煤矸石中微量元素含量的探讨

通过采集山东省兖济滕煤炭基地不同类别煤矸石（砂质矸、泥质矸、新鲜矸、风化矸、自燃矸）样品，对其矿物组成及微量元素含量进行分析测试。结果显示：矸石样品矿物组成主体均为高岭石、石英、伊利石／蒙脱石混层、蒙脱石、长石、方解石、白云石及黄铁矿等矿物，所测样品中未发现绿泥石。各种类型煤矸石样品中微量元素含量差别较大，砂、泥质含量不同的矸石样品中微量元素含量不同。砂质矸中微量元素含量低，泥质矸含量相对高。自燃矸大部分微量元素含量高于新鲜矸和未自燃风化矸，Co、Ni、Cu、Mo、Cd元素在自燃矸、风化矸中均显示富集的性质，但自燃矸比风化矸对元素的富集作用更为明显，因此泥质矸、风化矸、自燃矸可以释放出更多的有害微量元素，综合利用中应予以注意。

Probe into Trace Element Content in Different Type Gangues

Through sampling of different typed gangues （arenaceous, argillaceous, fresh, weathered, spontaneous combusted） in Jining- Tengzhou coal base, Shandong Province, analyzed and tested their mineral composition and trace element content. Results demonstrated that principal parts of mineral composition of gangue samples are kaolinite, quartz, illite/montmoriIlonite mixture, montmorillonite, feldspar, calcite, dolomite and pyrite etc., no chlorite found in samples tested. Trace element content has rather large differences between various typed gangues; different arenaceous and argillaceous content gangues have different trace element contents. Arenaceous gangue has lower trace element content, while in argillaceous gangue is relatively high. In spontaneous combusted gangue, content of most trace elements is higher than fresh and not spontaneous combusted weathered gangue. Co, Ni, Cu, Mo and Cd elements demonstrated their concentration in spontaneous combusted and weathered gangues, but more obvious in spontaneous gangue than in weathered gangue. So that argillaceous, weathered and spontaneous combusted gangues can release more harmful trace elements, thus need to pay attention to in comprehensive utilization.