煤中有害微量元素在选煤过程中的迁移特性  

Migration Characteristics of Harmful Trace Elements in Coal During Coal Preparation

作　　者：赵年琴 周贤珍 方吉 籍永华[1] ZHAO Nianqin;ZHOU Xianzhen;FANG Ji;JI Yonghua(School of Mining&Mechanical Engineering,Liupanshui Normal University,Liupanshui 553004,China)

机构地区：[1]六盘水师范学院矿业与机械工程学院,贵州六盘水553004

出　　处：《河南科技》2022年第9期55-58,共4页Henan Science and Technology

基　　金：六盘水师范学院矿物加工学一流课程培育建设项目(六盘水师院党政办发〔2020〕123号);六盘水师范学院科技创新团队项目(LPSSYKJTD201906);六盘水市科技局重点实验室项目(52020-2019-05-06、52020-2019-05-04);六盘水市科技局项目(52020-2018-04-11)。

摘　　要：应用消解试验对贵州省六盘水水矿集团汪家寨选煤厂的原煤、精煤、中煤、矸石进行消解,采用ICE-3500原子吸收光谱仪(火焰法)对原煤和三个产品中Cu、Pb、Zn、Cr、Co、Ni、Mn元素含量进行测定,用全自动测汞仪(5E-HGT2320)采用直接燃烧法对汞含量进行测定,用原子荧光光度计(AFS-8220)采用氢化物发生—原子荧光光谱法对砷含量进行测定。试验结果表明:汪家寨煤矿煤中所测的几种有害微量元素主要赋存在无机矿物中,采用煤炭洗选技术可以有效降低汪家寨煤中大多数有害元素的浓度,大部分有害元素在精煤中被脱除,有害元素基本迁移至高密度产品中,尤其是矸石产品中。The raw coal,clean coal,medium coal and gangue of Wangjiazhai Coal Preparation Plant of Liupanshui water mine group in Guizhou Province were digested by digestion experiment,the contents of Cu,Pb,Zn,Cr,Co,Ni and Mn in raw coal and three products were determined by ICE-3500 atomic ab⁃sorption spectrometer(flame method),the mercury content was determined by direct combustion method with automatic mercury analyzer(5E-HGT2320),and the arsenic content was determined by Hydride Generation Atomic Fluorescence Spectrometry with Atomic Fluorescence Photometer(AFS-8220).The experimental results show that Several trace harmful elements measured in Wangjiazhai Coal Mine are mainly contained in inorganic minerals,the coal washing technology can effectively reduce the concentra⁃tion of most harmful elements in Wangjiazhai Coal,most harmful elements are removed from clean coal,and the harmful elements basically migrate to high-density products,especially gangue products.

关 键 词：煤 微量有害元素 迁移特性 

分 类 号：P618.11[天文地球—矿床学]