湖北某黑云母方解石碳酸岩型铌矿石赋存状态及可选性评价  

Occurrence and Evaluation of Beneficiation of Sovite-Alvikite Niobium Ore in Hubei

作　　者：鲁力[1] 刘爽[1] 冉晓红 魏均启[1] 王芳[1] 

机构地区：[1]湖北省地质实验测试中心国土资源部稀土稀有稀散矿产实验技术重点实验室,湖北武汉430034

出　　处：《稀有金属》2015年第9期831-835,共5页Chinese Journal of Rare Metals

基　　金：国土资源部公益行业科研专项(201211070-02)资助

摘　　要：湖北某黑云母方解石碳酸岩型铌-稀土矿床,其物质组成复杂多样,选冶困难,一直未大规模地开发利用。通过偏光显微镜、化学分析、电子探针及X射线衍射（XRD）等测试手段,对该碳酸盐型铌稀土矿石的化学成分、结构构造、嵌布特征进行了详细研究,确定了铌矿物的种类和铌元素的赋存状态。铌矿物嵌布粒度普遍较细,铌铁矿粒径一般为0.02-0.03 mm;铌金红石粒径一般为0.01-0.02 mm。铌铁矿和铌金红与伴生矿物的嵌布形式复杂多样,解离困难,主要与方解石、黑云母、磷灰石、钛铁矿、黄铁矿共生分布。铌元素有两种存在形式,其中以独立矿物形式存在的占77.56%,主要形成铌铁矿、铌铁金红石;分散状态的铌占22.42%,铌作为类质同像形式或显微包裹体导致铌的分散。根据铌矿石性质,可采用磁选、重选、浮选及化学处理等回收方法实现铌矿物的回收。The deposits of sovite-alvikite type are rich in niobium-rare earth in Hubei province, but its complicated composition makes it hard to be benefieiated and smelted, so the niobium-rare earth deposits have not been exploited and utilized in a large scale for a long time. By polarized microscopy, chemical analysis, electron microprobe and X-ray diffraction （XRD） analysis and other tests, niobium minerals and accompany minerals category and content of samples were studied, including chemical compositions, structure construction, embedded characteristics and modes of occurrence of niobium minerals. The niobite minerals was finely disseminated, niobite particles size mainly ranged from 0.02 to 0.03 mm and ilmenorutile particles size mainly ranged from 0.01 to 0.02 mm. Niobite minerals were of complicated occurrence relationship, difficult dissociation in the ore and main symbiosis with calcite, biotite, apatite, ilmenire, pyrite. The niobium element had two existing forms, about 77.76% were liberated, mainly existed in niobite and ilmenorutile, but 22.24% of niobium minerals were of scattered distribution as isomorphism or microscopic inclusions. Based on the ore characteristics, the recycling of niobium minerals could be realized by magnetic separation, gravity separation, flotation and chemical processing.

关 键 词：铌铁矿 铌金红石 矿物组成 赋存状态 

分 类 号：TD912[矿业工程—选矿]