准格尔煤田官板乌素6号煤层中煤矸石的矿物学特征研究

Mineralogical features of the coal gangue in the Guanbanwusu mine,Jungar coalfield

运用X射线衍射、红外光谱、热重-热流和扫描电镜等手段对准格尔矿区官板乌素煤矿主采6号煤层下部层位中煤矸石的矿物组成和微观形貌进行了系统研究。结果表明，煤矸石在官板乌素煤矿6号煤层下部层位中分布广泛，呈薄层状产出，主要矿物组成为高岭石，其次含有极少量的勃姆石等矿物。样品中SiO2/Al2O3（摩尔比值）在2.00~2.10之间，接近高岭石族矿物理论比值，有害组分铁、钛含量相对较低。在扫描电镜下，可见煤矸石样品中高岭石单晶形态主要为六方片状，叠片状聚晶，晶片的片径多在5 μm以下。该矿区煤矸石中的高岭石为结晶度较高的优质高岭岩，可用于生产陶瓷。

The mineral composition and microstructure of the parting of Guanbanwusu mining area in Jungar Coalfield were analyzed with X-ray diffraction, Fourier transform infrared spectrum and Scanning electron microscope. The results indicate that partings are widely distributed in the bottom layer of No.6 coal seam of the Guanbanwusu coal mine, showing lamellar output. The main mineral in the partings is kaolinite followed by a very small amount of boehmite and other minerals. The molar ratio of SiO2/Al2O3 is approximately 2.00~2.10, which is close to the theoretical ratio of the kaolinite group minerals. The sample has a low content of Fe and Ti. The single-crystal form of kaolinite is mainly hexagonal plate, flaky stacked polycrystalline, as shown by scanning electron microscope. The size of the single-crystal is less than 5 μm. The kaolinite in the gangue of the Guanbanwusu mining area has high crystallinity, which can be used to produce ceramics.