赣西地区某花岗岩云母锂矿工艺矿物学研究  

Process mineralogy of granite-type lithium deposits in western Jiangxi province

作　　者：刘星星 李仁泽 张家琪 熊凯 周先军 彭波 李美荣 梁冬云 LIU Xingxing;LI Renze;ZHANG Jiaqi;XIONG Kai;ZHOU Xianjun;PENG Bo;LI Meirong;LIANG Dongyun(The Fifth Geological Brigade of Jiangxi Geological Bureau,Xinyu 338000,Jiangxi,China;The Third Geological Brigade of Jiangxi Geological Bureau,Jiujiang 332100,Jiangxi,China;Institute of Resources Utilization and Rare Earth Development,Guangdong Academy of Sciences,Guangzhou 510650,China)

机构地区：[1]江西省地质局第五地质大队,江西新余338000 [2]江西省地质局第三地质大队,江西九江332100 [3]广东省科学院资源利用与稀土开发研究所,广州510650

出　　处：《有色金属科学与工程》2025年第2期280-286,共7页Nonferrous Metals Science and Engineering

基　　金：江西省重点研发计划“揭榜挂帅”资助项目(20223BBG71015);江西省技术创新引导类计划资助项目(2023KDG01002);江西省地质局勘查基金资助项目(2023HYN03)。

摘　　要：近年来,赣西地区新探明巨量花岗岩型锂矿资源。为了厘定其锂的赋存状态以及工艺矿物学特征,选取该地区某超大型花岗岩云母锂矿展开系统的工艺矿物学研究,利用扫描电镜(SEM)、X射线衍射仪(XRD)及矿物自动定量分析(MLA)系统,开展矿物成分、物化性质、矿物嵌布粒度、元素赋存状态等岩矿相学及工艺矿物学研究。研究结果表明:赋存于云母、羟磷锂铝石和锂绿泥石中的锂分别占93.88%、0.16%和0.30%,分散于石英和长石中的锂占有率为5.66%。云母主要为锂白云母,其次为锂云母(两者质量比为9.5∶1)。云母嵌布粒度较粗,主要分布于0.16~2.56 mm粒级范围内,磨矿后云母各粒级的解离度均在90%以上,并在0.3 mm粒级内相对富集。通过选矿回收锂云母、锂白云母,云母精矿的Li_(2)O平均品位为1.30%,锂的理论回收率为93.88%。可以利用云母的含锂量与磁性变化关系特点,采用强磁选以提高云母浮选精矿的含锂量。A considerable number of granite-type lithium resources have been newly discovered in western Jiangxi province for the past few years.In order to determine the occurrence state and process mineralogical characteristics of lithium,systematic research of process mineralogy on large-scale granite-type mica lithium deposits was carried out by using scanning electron microscopy (SEM),X-ray diffraction (XRD) and mineral automatic quantitative analysis(MLA).The study comprised mineral composition,physico-chemical properties,mineral dissemination size,and element occurrence status.The research results indicated that lithium occurred in mica,montebrasite,and cookeite accounting for 93.88%,0.16%and 0.30%,respectively,while lithium in quartz and feldspar accounted for 5.66%.The mica was mainly trilithionite,followed by lepidolite (with a ratio of 9.5∶1).The mica dissemination size was relatively coarse,mainly distributed in the range of 0.16~2.56 mm.After grinding,the dissociation degree for different granularity mica was above 90%,with relative enrichment in the 0.3 mm particle size.Lepidolite and trilithionite were recovered in mineral processing.The average grade of Li_(2O) for lepidolite concentrate was 1.30%,and the theoretical recovery rate of lithium was 93.88%.The relationship between lithium content and magnetism in mica shows that high-intensity magnetic separation could improve the lithium content in the mica flotation concentrate.

关 键 词：工艺矿物学 锂云母 锂白云母 赋存状态 综合利用 

分 类 号：TD954[矿业工程—选矿] P575[天文地球—矿物学]