宁东煤田中部侏罗纪煤的矿物学特征

发布时间：2018-01-31 21:29

本文关键词： 矿物侏罗纪宁东煤田鄂尔多斯盆地　出处：《煤炭学报》2017年06期 　论文类型：期刊论文

【摘要】：样品采自鄂尔多斯盆地西部宁东煤田的7个井田,共26个样品,包括25个煤样和1个矸石样。对所采的25个煤样做了工业分析、全硫分析和发热量分析,并运用低温灰化-X射线衍射(LTA-XRD)仪、光学显微镜、扫描电镜(SEM)以及能谱仪(EDS)等设备对样品矿物成分、化学成分、微形貌特征等方面进行了研究,探讨了煤中矿物的物质来源。研究表明,宁东煤田中部侏罗纪煤属中等挥发分煤,具有中灰、低硫、中低发热量的特征,其(低温灰化后)矿物组成为:33.1%高岭石、22.8%伊利石、21.5%石英、13.2%钠长石、6.6%鲕绿泥石、2.8%方解石。另外在扫描电镜下还发现了极少量的黄铁矿、菱铁矿、钛铁矿、黄铜矿、锆石。高岭石、伊利石、鲕绿泥石、石英、钠长石源自贺兰山脉片麻岩、麻粒岩和花岗岩的风化产物。
[Abstract]:The samples were collected from 7 coalfields in Ningdong coalfield in western Ordos Basin, including 25 coal samples and 1 gangue sample. Industrial analysis, total sulfur analysis and calorific analysis were carried out for 25 coal samples collected. The mineral composition and chemical composition of the samples were analyzed by means of low temperature ashing X-ray diffraction (LTA-XRD) apparatus, optical microscope, scanning electron microscope (SEM) and energy dispersive spectrometer (EDS). The material sources of the minerals in the coal are studied in this paper. The results show that the Jurassic coal in the central part of Ningdong coalfield is a medium volatile coal with the characteristics of medium ash, low sulfur and low calorific value. Its mineral composition is: 33.1% kaolinite 22.8% Illite 21.5% quartz 13.2% albite and 6.6% oolitic chlorite. 2.8% calcite. In addition, very small amounts of pyrite, siderite, ilmenite, chalcopyrite, zircon, kaolinite, Illite, oolitic chlorite and quartz were found under SEM. Albite is derived from weathering of gneiss granulites and granulites from the Helan Mountains.
【作者单位】：河北工程大学河北省资源勘测研究重点实验室;河北工程大学地球科学与工程学院;
【基金】：国家自然科学基金资助项目(41330317,41641019) 河北省自然科学基金资助项目(D2016402104)
【分类号】：P618.11
【正文快照】： 中国是世界上最大的煤炭生产国和消费国,并且这一现状在相当长的时期内不会有大的改变。根据BP p.l.c,2015年,中国煤炭生产和消费分别是1 827.0 Mtoe和1 920.4 Mtoe,分别占世界总额的47.7%和50.0%[1]。煤炭支撑着中国经济和工业的粗放型增长,与此同时,在煤炭加工和利用过程中

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