淮南煤田张集矿山西组煤中锑含量和赋存状态及富集成因  

Content,occurrence and enrichment mechanism of antimony in coal from Shanxi formation of Zhangji coal mine,Huainan coalfield

作　　者：刘嘉璐 郑刘根[1,2] 韩必武 张军 蔡有京 邢大卫 LIU Jialu;ZHENG Liugen;HAN Biwu;ZHANG Jun;CAI Youjing;XING Dawei(School of Resources and Environmental Engineering,Anhui University,230601 Hefei,China;Engineering Laboratory for Mine Ecological Restoration in Anhui Province,230601 Hefei,China;Geological Technology Department of Huaihe Energy(Group)Company Limited,232001 Huainan,China)

机构地区：[1]安徽大学资源与环境工程学院,合肥230601 [2]安徽省矿山生态修复工程实验室,合肥230601 [3]淮河能源控股集团有限责任公司通防地质技术部,安徽淮南232001

出　　处：《煤炭转化》2023年第1期1-9,共9页Coal Conversion

基　　金：国家自然科学基金项目(42072201);安徽省自然科学基金项目(1608085QD79);安徽高校协同创新项目(GXXT-2019-029)。

摘　　要：以淮南煤田张集矿山西组煤为研究对象,刻槽采集煤样,采用电感耦合等离子体质谱仪、X射线荧光光谱仪、X射线衍射仪、偏光显微镜、扫描电镜等手段,结合相关性分析和逐级化学提取实验,探讨了张集矿山西组煤中锑的含量分布、赋存状态及其富集成因。结果表明:张集矿山西组煤中锑含量范围为2.49μg/g~4.57μg/g,平均3.13μg/g,高于世界煤背景值,富集系数为3.4,属于轻度富集;同煤层中锑含量变化较大,在垂向上,顶部和底部煤样中锑含量高;张集矿山西组煤中锑主要赋存在硅铝酸盐矿物中,其中顶部和底部煤样中的锑还赋存于黄铁矿中;成煤盆地受陆源碎屑输入作用越强,淮南煤中锑含量越大,因此推断煤中锑的富集主要与物源区的陆源物质输入有关;此外,煤中锑元素的富集还受地下水活动和围岩作用影响。In this study,coal samples were collected with the channel-sampling procedure from the Shanxi formation of Zhangji coal mine in the Huainan coalfield.The content distribution,occurrence state and enrichment of antimony in this formation coal were discussed through step-by-step chemical extraction experiments and a series of tests,involving inductively coupled plasma mass spectrometer(ICP-MS),X-ray fluorescence spectrometer(XRF),X-ray diffractometer(XRD),polarized light microscope(PLM),scanning electron microscope(SEM),as well as the correlation analysis.The results show that the antimony content in the Zhangji coal ranges from 2.49μg/g to 4.57μg/g,with an average of 3.13μg/g,which is higher than the bass value of coals in the world.The enrichment coefficient was 3.4,indicating a mild enrichment.In addition,the content of antimony in the same coal seam varies greatly.In the vertical direction,the content of antimony in the top and bottom coal samples is high.Meanwhile,antimony in the Zhangji coal mainly occurs in silicate minerals.While the antimony in the top and bottom coal samples also occur in pyrite.Furthermore,with the enhancement of the input of terrigenous materials in the coal-forming basin,the antimony content in Huainan coal shows an increasing trend.Therefore,it can be inferred that the enrichment of antimony in coal is mainly related to the input of terrigenous materials from provenance areas.Besides,the enrichment of antimony in coal is also affected by groundwater activities and surrounding rock.

关 键 词：山西组煤 锑 含量分布 赋存状态 富集成因 

分 类 号：TQ533[化学工程—煤化学工程]