能量色散X射线荧光光谱仪在钼矿选矿流程中的应用  

Application of energy dispersion X-ray fluorescence spectrometry in beneficiation process of molybdenum ore

作　　者：张敏[1] 李小莉[2] 

机构地区：[1]金堆城钼业集团有限公司,陕西渭南714102 [2]天津地质矿产研究所,天津300171

出　　处：《冶金分析》2016年第3期54-58,共5页Metallurgical Analysis

摘　　要：通过使用能量色散X射线荧光光谱仪对钼矿含量进行分析，建立了快速测定钼矿选矿过程中的尾矿、原矿和钼粗精矿样品中Mo、Pb、Cu、Fe、S、K等6种元素的分析方法。由于钼矿石标准样品较少，因此实验选用钼矿选矿中不同阶段具有一定含量梯度的多个经湿法准确定值后的实际样品作为校准样品绘制校准曲线，同时采用经验系数法及散射线内标法来校正元素之间的影响，从而降低了基体效应和谱线重叠的干扰。各组分校准曲线的相关系数为O．9993～1．0000，各元素的检出限在3～10μg／g之间。对钼矿样品进行精密度考察，各组分测定结果的相对标准偏差（RSD，n=9）在O．22％～3．7％之间；对钼矿样品进行正确度考察，测定值与湿法值一致。The content of molybdenum ore was analyzed by energy dispersion X-ray fluorescence spectrometry.Thus,a rapid determination method of six components(Mo,Pb,Cu,Fe,S and K)in tailings,raw ore and rough concentrate of molybdenum ores in beneficiation process was established.Since there was few certified reference material of molybdenum ore,several actual samples with certain content gradients,which were selected from different stages of beneficiation process and then determined by wet method,were used as calibration samples to prepare the calibration curves.Meanwhile,the influence among elements was corrected by the empirical coefficient method and scattering line internal standard method.As a result,the interference of matrix effect and spectral overlapping could be reduced.The correlation coefficients of calibration curves were between 0.999 3and 1.000 0.The detection limits of elements were between 3μg/g and 10μg/g.The precision test of molybdenum ore samples was conducted.It was found that the relative standard deviations(RSD,n=9)of determination results were between 0.22% and3.7%.The determination accuracy of molybdenum ore samples was also investigated.The results were consistent with those obtained by the wet method.

关 键 词：能量色散X射线荧光光谱法 尾矿 原矿 钼粗精矿 

分 类 号：O657.34[理学—分析化学] TD954[理学—化学]