第35卷1期2023年1月中国煤炭地质COALGEOLOGYOFCHINAVol.35No.1Jan.2023doi:10.3969/j.issn.1674-1803.2023.01.02文章编号:1674-1803(2023)01-0007-06宁武煤田2号煤中镓的富集与赋存特征马娟娟,张帆,李舒研,李敬智,王金喜∗(河北工程大学河北省资源勘测研究重点实验室,河北邯郸056038)摘要:宁武煤田是我国典型的煤伴生资源丰富的煤炭基地。为研究煤中Ga的成矿规律,从宁武煤田2号煤中采集了117个煤样,通过工业分析、X射线衍射、扫描电子显微镜、X射线荧光光谱、电感耦合等离子体质谱和逐级化学提取实验对样品进行测试分析。结果表明宁武煤田2号煤中Ga的平均含量为30.93μg/g,整体上属于轻度富集—富集。逐级化学提取的结果显示煤中Ga的赋存以残渣态为主,占比87~92%,其次为有机态,占比6%~10%。由煤中Ga与煤质和常量元素的相关性分析认为,高岭石、勃姆石等黏土矿物是煤中Ga的主要矿物载体,黏土矿物对Ga的吸附是2号煤中Ga富集的主要原因。关键词:煤中镓;富集规律;赋存状态;宁武煤田中图分类号:TQ533.1文献标识码:AEnrichmentandOccurrenceofGainNo.2CoalSeamofNingwuCoalfieldMAJuanjuan,ZHANGFan,LIShuyan,LIJingzhi,WANGJinxi∗(KeyLaboratoryofResourceExplorationResearchofHebeiProvince,HebeiUniversityofEngineering,Handan,Hebei056038)Abstract:Ningwucoalfieldisatypicalcoalbasewithabundantcoalassociatedresources.InordertostudythemetallogenicregularityofGaincoal,117coalsampleswerecollectedfromNo.2coalseaminNingwucoalfield.Thesamplesweretestedandanalyzedbyindustri-alanalysis,X-raydiffraction,scanningelectronmicroscopy,X-rayfluorescencespectroscopy,inductivelycoupledplasmamassspec-trometryandsequentialchemicalextractionexperimental.TheresultsshowthattheaveragecontentofGainNo.2coalseamofNingwucoalfieldis30.93μg/gandslightlyenriched.TheresultsofsequentialchemicalextractionexperimentalshowsthatthemainoccurrenceofGaincoalisresidue,accountingfor87%~92%,followedbyorganicstate,accountingfor6%~10%.BasedonthecorrelationanalysisofGaincoalwithcoalqualityandmajorelements,itisconcludedthatclaymineralssuchaskaoliniteandboehmitearethemainmineralcarriersofGaincoal.TheadsorptionofclaymineralstoGaisthemainreasonforGaenrichmentinNo.2coalseam.Keywords:Galliumincoal;enrichmentre...
