准格尔煤田高铝煤物质组成及成因  

Composition and origin of high-alumina coal in Jungar coalfield

作　　者：刘霖松 石松林 孙俊民 李锦涛 王兆国 李佳星 刘钦甫[1] Liu Linsong;Shi Songlin;Sun Junmin;Li Jintao;Wang Zhaoguo;Li Jiaxing;Liu Qinfu(College of Geoscience and Surveying Engineering,China University of Mining and Technology-Beijing,Beijing 100083,China;School of Resources and Environment Engineering,Henan University of Engineering,Zhengzhou Henan 451191,China;Research and Development Center of High Alumina Coal,Datang International Power Generation Co.,Ltd,Erdos Inner Mongolia 010321,China;School of Chemical and Environmental Engineering,China University of Mining and Technology-Beijing,Beijing 100083,China)

机构地区：[1]中国矿业大学(北京)地球科学与测绘工程学院,北京100083 [2]河南工程学院资源与环境学院,河南郑州451191 [3]大唐国际发电股份有限公司高铝煤炭资源开发利用研发中心,内蒙古鄂尔多斯010321 [4]中国矿业大学(北京)化学与环境工程学院,北京100083

出　　处：《矿业科学学报》2022年第1期101-112,共12页Journal of Mining Science and Technology

基　　金：国家重点研发项目(2019YFC1904903);内蒙古准格尔旗科技计划;山西省科技重大专项(20181101003)。

摘　　要：利用煤岩学、矿物学和地球化学等研究方法,在分析准格尔煤田的构造背景和聚煤环境的基础上,研究了准格尔煤田6号煤层的煤岩煤质特征、煤和夹矸中无机矿物组成、分布及赋存特征,并探讨其成因。研究表明,6号煤层有机显微组分中惰质组、镜质组、壳质组平均含量分别为59%、28%、13%,与华北其他地区晚古生代煤相比,其中的惰质组含量偏高,反映6号煤层形成时地表水供给充分;煤中无机显微组分及夹矸中主要矿物为高岭石和勃姆石,还有少量的石英、方解石、菱铁矿、黄铁矿、硬石膏、锐钛矿和磷锶铝矾等;6号煤层中部富集大量勃姆石,上部和下部则主要富集高岭石;高岭石成因主要有胶体沉积结晶、陆源搬运沉积和火山灰蚀变3种,勃姆石成因主要有氧化铝胶体沉淀结晶和高岭石脱硅蚀变2种。Based on the analysis of tectonic background and coal-accumulating environment of Jungar coalfield,the coal petrological characteristics,inorganic mineral composition,distribution and occurrence regularity of coal and gangue in No.6 coal of the Junger coalfield are studied,and the genesis is determined byutilizing the research methods of coal petrology,mineralogy and geochemistry.The study shows that the average contents of the inertinite,vitrinite and exinite in the maceral of No.6 coal in the study area are 59%,28%and 13%,respectively.Compared with the Late Paleozoic coals in other areas of North China,the content of the inertinite is high,which reflects an adequate supply of surface water dur-ing the formation of No.6 coal seam.The main inorganic minerals in coal and gangue are kaolinite and boehmite,associated with quartz,calcite,siderite,pyrite,anhydrite,anatase and svanbergite.The vertical changes of the mineral composition and main chemical elements of No.6 coal indicate that the middle of the coal seam is rich in boehmite,while the upper and lower parts are rich in kaolinite.There are three origins of kaolinite:colloidal precipitation crystallization,terrestrial transport sedimentation and volcanic ash alteration.And there are two origins of boehmite:alumina colloidal precipitation crystallization and desilication alteration of kaolinite.

关 键 词：准格尔煤田 高铝煤 高岭石 勃姆石 

分 类 号：P618.11[天文地球—矿床学]