高灵敏度单波长激发能量色散X射线荧光光谱法测定铜精矿中16种组分  

Determination of sixteen components in copper concentrate by high sensitivity monochromatic excitation energy dispersive X-ray fluorescence spectrometry

作　　者：冯先进 韩伟丹 滕飞 刘小东 胡军凯 FENG Xianjin;HAN Weidan;TENG Fei;LIU Xiaodong;HU Junkai(BGRIMM MTC Technology Co.,Ltd.,Beijing 102628,China;Beijing Ancoren Science&Technology Co.,Ltd.,Beijing 101102,China;Daye Nonferrous Design and Research Institute Co.,Ltd.,Huangshi 435005,China)

机构地区：[1]北矿检测技术有限公司,北京102628 [2]北京安科慧生科技有限公司,北京101102 [3]大冶有色设计研究院有限公司,湖北黄石435005

出　　处：《冶金分析》2022年第7期1-9,共9页Metallurgical Analysis

基　　金：国家重点研发计划战略性矿产资源开发利用重点专项(2021YFC2903100)。

摘　　要：铜精矿技术条件中要求的组分覆盖范围从主量、常量、微量到痕量,要使用一种检测技术同时测定这些组分是铜精矿测定的难题。单波长激发能量色散X射线荧光光谱仪,采用双曲弯晶全聚焦技术,将X射线连续谱单色化,降低了连续谱背景,改善检出限,提高灵敏度,对组分的检测范围可覆盖主量到痕量。实验基于高灵敏度单波长激发能量色散X射线荧光光谱法(HS-EDXRF)结合快速基本参数法建立了铜精矿中主量组分Cu、S、Fe、SiO_(2),常量组分CaO、MgO、Al_(2)O_(3),微量和痕量组分Zn、Ni、Cr、Pb、Sb、Cl、Ag、As、Bi等16种组分的分析方法。采用实验方法测定铜精矿样品,结果与标准方法或经典分析方法结果对比,无显著性差异(t_(0.05,82)值均小于1.98)。此外,主量组分Cu、S、Fe、SiO_(2)测定结果的相对标准偏差(RSD,n=7)不大于0.70%,常量组分CaO、MgO、Al_(2)O_(3)的RSD小于1.6%,微量组分Zn、Ni、Cr、Pb、Sb、Cl的RSD不大于3.3%,痕量组分Ag、As、Bi等的RSD均小于10%。方法可满足铜冶炼工艺对铜精矿中16种组分的检测需求。The coverage of the components required in the technical conditions of copper concentrate ranges from main,macro,micro to trace.Therefore,it is difficult to determine these components in copper concentrate simultaneously using one instrument technology.The monochromatic excitation energy dispersive X-ray fluorescence spectrometer uses hyperboloid bent crystal confocal technique for the monochromatization of X-ray continuous spectrum,thus reducing the interference of continuum background,decreasing the limit of detection,and enhancing the sensitivity.The detection range of the components can cover the main to trace.In experiments,a method for the analysis of 16 components including main components(Cu,S,Fe,SiO_(2)),macro-components(CaO,MgO,Al_(2)O_(3)),micro and trace components(Zn,Ni,Cr,Pb,Sb,Cl,Ag,As,Bi)in copper concentrate was established based on high sensitivity monochromatic excitation energy dispersive X-ray fluorescence spectrometer(HS-EDXRF)and fast fundamental parameter(FP)method.The copper concentrate samples were determined according to the experimental method.The found results were compared with those obtained by the standard methods or classical analysis methods,and there was no significant difference(All t_(0.05,82)values were less than 1.98).In addition,the relative standard deviations(RSD,n=7)of determination results for main components(Cu,S,Fe,SiO_(2)),macro-components(CaO,MgO,Al_(2)O_(3)),micro components(Zn,Ni,Cr,Pb,Sb,Cl),and trace components(Ag,As,Bi)were not more than 0.70%,1.6%,3.3%and 10%,respectively.The proposed method could meet the detection requirements of 16 elements in copper concentrate in copper smelting process.

关 键 词：铜精矿 粉末压片 高灵敏度单波长激发能量色散X射线荧光光谱法(HS-EDXRF) 快速基本参数法 组分 

分 类 号：O657.34[理学—分析化学] TF031[理学—化学]