河南某地花岗伟晶岩型铌钽等稀有金属赋存状态研究

    Study on Occurrence States of Rare Metal Elements in a Granite Pegmatite Pattern Niobium-Tantalum Ore in Henan

    • 摘要: 稀有金属元素赋存状态研究可为稀有金属矿产勘察、矿物加工和冶金工艺方法的选择提供基础资料和理论依据。本文以河南某地花岗伟晶岩岩型铌钽矿石为研究对象,综合利用化学分析、X-射线衍射、光学显微镜、扫描电镜及能谱等测试方法,对矿石中稀有金属元素的赋存状态进行了研究。结果表明:铌、钽主要以独立矿物铌钽锰矿-钽铌锰矿、细晶石形式存在,很少量以类质同象形式赋存在锡石中;铍主要以独立矿物绿柱石形式存在。可回收的矿物为铌钽锰矿、钽铌锰矿、细晶石和绿柱石。此矿床铌钽品位低、赋存状态较复杂,建议采用重选、强磁选、摇床等联合选矿工艺回收铌钽。

       

      Abstract: Study on occurrence states of rare metal elements provides basic date and theoretical basis for prospecting, processing and selecting metallurgical process of the rare metal ore. In this paper, niobium-tantalum ore from a granite-pegmatite in Henan Province was analyzed by means of chemical analysis, X-ray diffraction analysis, polarization optical microscope, scanning electron microscopy and energy dispersive spectroscopy, the occurrence states of rare metal elements was discussed. The results showed that niobium and tantalum occur in niobium-tantalum minerals and microlite, mainly exist as independent minerals. In addition, a small quantity of niobium and tantalum occurs in cassiterite and exists as isomorphism. Beryllium occurs in beryl and exists as independent mineral. The recoverable minerals are niobium-tantalum minerals, microlite and beryl. In this deposit, niobium and tantalum are of low grade and complex occurrence state, so it is suggested to recycle niobium and tantalum by gravity separation, strong magnetic separation and shaking table.

       

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