敞口酸熔-电感耦合等离子体发射光谱法测定稀有多金属矿选矿样品中的铌钽和伴生元素

发布时间：2018-05-01 07:13

本文选题：铌钽多金属矿 + 伴生元素　；参考：《岩矿测试》2017年06期

【摘要】：稀有多金属矿各类选矿样品中同一元素的含量相差较大,且同一样品中各元素的含量也有较大差异,如铌钽锂铍在尾矿和原矿中的含量只有几十至几百!g/g,而在精矿中的含量达到百分之几至百分之几十,伴生元素如钾、钠在不同样品中也有较大差异。应用敞口酸熔-电感耦合等离子体发射光谱法(ICP-OES)测定铌钽锂铍等元素通常采用三酸或四酸分解样品,多是测定尾矿、原矿及部分中矿样品中较低含量的铌钽锂铍,且同一测定体系中只测定了一种或两种元素。本文采用氢氟酸-硝酸-盐酸-高氯酸-硫酸分解样品,以3~4滴氢氟酸+5%硫酸+5%过氧化氢提取体系替代常规的有机酸(酒石酸等)提取体系,实现了应用ICP-OES同时测定稀有金属矿选矿试验各阶段产品中不同含量的铌钽锂铍钾钠铷铁钛等元素。各元素的谱线强度在0~500μg/mL浓度范围内呈良好的线性关系,相对标准偏差为0.37%~4.77%(n=6)。该方法提高了选矿全流程样品中各类元素的分析效率,已在选冶试验流程样品分析中得到了应用。
[Abstract]:The content of the same element in all kinds of mineral processing samples of rare polymetallic ore is quite different, and the content of each element in the same sample is also quite different. For example, the content of niobium, tantalum, lithium beryllium and beryllium in tailings and raw ores is only tens to hundreds of g / g, while in concentrate, the content of niobium, tantalum, lithium-beryllium and beryllium is several to several percent. The associated elements such as potassium and sodium are also different in different samples. Determination of niobium, tantalum, lithium, beryllium and other elements by open acid melting-inductively coupled plasma emission spectrometry (ICP-OES) is usually carried out by triacid or tetracarboxylic acid decomposition, mostly by determination of lithium niobium, tantalum, beryllium, niobium, tantalum and beryllium in tailings, raw ores and some middle ore samples. Only one or two elements were determined in the same system. In this paper, hydrofluoric acid, nitric acid, hydrochloric acid, perchloric acid-sulfuric acid and sulfuric acid were used to decompose the sample, and 5% hydrofluoric acid 5% H 2O 2 extraction system was used to replace the conventional organic acid (tartaric acid, et al.) extraction system. The application of ICP-OES to the simultaneous determination of niobium, tantalum, lithium, beryllium, potassium, sodium, rubidium, iron and titanium and other elements in various stages of mineral processing of rare metal ores has been realized. The spectral line strength of each element is linear in the concentration range of 0 ~ 500 渭 g/mL, and the relative standard deviation is 0.37 ~ 4.77 ~ 6 ~ (-1). This method has improved the efficiency of analysis of all kinds of elements in the samples of the whole process of dressing, and has been applied in the sample analysis of the process of dressing and smelting.
【作者单位】：河南省岩石矿物测试中心;河南省矿物加工与生物选矿工程技术研究中心;中国地质大学(武汉)材料与化学工程学院;
【基金】：国土资源部公益性行业专项“铌钽选矿过程现代实验技术及标准物质研制”(201411107-02)
【分类号】：O657.3;TD9

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