云南大关天星石英矿工艺矿物学研究  

Mineralogical Study about the Tianxing Quartz Ore at Daguan,Yunnan Province

作　　者：王守敬[1,2,3] 杨光 马驰 邵伟华[1,2,3] WANG Shoujing;YANG Guang;MA Chi;SHAO Weihua(Zhengzhou Institute of Multipurpose Utilization of Mineral Resources,CAGS,Zhengzhou 450006,China;China National Engineering Research Center for Utilization of Industrial Minerals,Zhengzhou 450006,China;Engineering Technology Innovation Center for Development and Utilization of High Purity Quartz,Ministry of Natural Resources,Zhengzhou 450006,China)

机构地区：[1]中国地质科学院郑州矿产综合利用研究所,河南郑州450006 [2]国家非金属矿资源综合利用工程技术研究中心,河南郑州450006 [3]自然资源部高纯石英资源开发利用工程技术创新中心,河南郑州450006

出　　处：《矿产保护与利用》2024年第5期100-106,共7页Conservation and Utilization of Mineral Resources

基　　金：国家自然科学基金项目(U2344206)。

摘　　要：采用矿物解离度分析仪(MLA)分析、扫描电镜分析、光薄片鉴定等方法对云南大关地区天星石英砂岩型矿石进行了详细的矿物学研究。分析结果显示该矿SiO2含量98.95%,石英含量98.47%,主要杂质矿物为黏土矿物、黑云母和金红石等。矿石中石英原生粒度主要为100~210μm,黏土矿物粒度主要分布在10μm以下和75~150μm,金红石和锆石等主要分布在38~75μm。石英多以碎屑物的形式赋存,大部分杂质矿物分布在石英颗粒之间,其中黏土矿物多以胶结物形式赋存,金红石等多以碎屑物形式赋存,少量金红石被石英包裹。对矿体不同层位样品的分析显示,在磨矿细度基本不变的情况下,薄层状矿石中被包裹的金红石等有害矿物含量明显高于厚层状矿石。建议按矿石性质对云南大关天星石英砂岩矿分级利用,其中厚层状矿石适合加工超白石英砂等高端用途,薄层状矿石可以考虑生产中低端石英砂原料。同时建议选矿过程中适当降低磨矿细度,以提高石英单体解离度。Mineral liberation analyzer(MLA),scanning electron microscope(SEM),and other analysis were used to study the mineralogical characteristics of the Tianxing quartz sandstone ore at Daguan,Yunnan Province in this paper.The result showed that the SiO2 content of the ore was 98.95%,and the content of quartz was 98.47%.the other minerals were rutile,zircon,clay mineral,and so on.The primary particle size of quartz was 100~210μm,and the clay minerals were below 10μm or 75~150μm,the rutile and zircon were 38~75μm.Most of the quartz,rutile and zircon existed as clastics in the ore,and most of the clay minerals existed as cementation.Most of the impurities were presented between quartz,only a few were surrounded by quartz.The analysis of the ore at different position showed that under the similarity grinding fineness,the content of harmful minerals such as rutile in the thin−layered ore were higher than thick plate ore.It was suggested that Yunnan Daguan Tianxing quartz sandstone ore should be graded and utilized according to the ore properties,among which the thick plate ore was suitable for high−end uses such as processing ultra−white quartz sand,and the thin−layered ore can be considered as the raw material of low−end quartz sand.At the same time,it was suggested that the grinding fineness should be appropriately reduced in the beneficiation process to improve the dissociation degree of quartz monomer.

关 键 词：天星 工艺矿物学 石英砂岩 金红石 黏土矿物 

分 类 号：TD91[矿业工程—选矿]