能量色散X射线荧光光谱仪在钼矿选矿流程中的应用

发布时间：2018-01-15 23:29

本文关键词：能量色散X射线荧光光谱仪在钼矿选矿流程中的应用　出处：《冶金分析》2016年03期 　论文类型：期刊论文

【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0.999 3~1.000 0,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0.22%~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。
[Abstract]:Based on the analysis of molybdenum ore content by energy dispersive X-ray fluorescence spectrometer, the rapid determination of Mo-PbPbCU Fe-S in molybdenum ore processing process, raw ore and molybdenum coarse concentrate samples has been established, and the results are as follows: (1) the content of molybdenum ore is analyzed by energy dispersive X-ray fluorescence spectrometry (EXRF). Analysis method of K and other 6 elements. Because of less standard sample of molybdenum ore. Therefore, the calibration curve of molybdenum ore is drawn from many actual samples with certain content gradient in different stages of molybdenum ore dressing after accurate determination of the value by wet method. At the same time, empirical coefficient method and scattering line internal standard method are used to correct the influence of elements. Thus, the interference of matrix effect and spectral line overlap is reduced. The correlation coefficient of calibration curve of each component is 0.999 3 ~ 1.000 0. The detection limit of each element is between 3 渭 g / g and 10 渭 g / g. For molybdenum samples, the relative standard deviation (RSD) of each component is between 0.22% and 3.7%. The accuracy of the molybdenum sample was investigated and the measured value was in agreement with the wet method.
【作者单位】：金堆城钼业集团有限公司;天津地质矿产研究所;
【分类号】：O657.34;TD954
【正文快照】： Mo是重要的工业和军工材料,它在地壳中的质量分数约为0.003%,多数以硫化物形态存在。矿石中Mo的含量一般很低,约为千分之几至百分之几。选矿得到的钼精矿含Mo可达50%。钼矿中常伴生有Cu、Pb、Fe、S和K等元素。钼矿的边界品位:Mo质量分数为0.02%~0.03%;工业品位:Mo质量分数为0.

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