Application of X-ray fluorescence spectrometry on the determination of copper and thirteen impurity elements in crude copper
SUN Ke1,2,3, GE Xiao-han4
1. Research and Development Center,Henan Zhongyuan Gold Smelter Co., Ltd., Sanmenxia 472000, China; 2. Academicians Workstation of Gold Concentrate Comprehensive Recovery of Henan Province, Sanmenxia 472000, China; 3. Key Laboratory of Comprehensive Utilization of Gold Resources in Henan Province, Sanmenxia 472000, China; 4. Sanmenxia Polytechnic School of Electrical Engineering, Sanmenxia 472000, China
Abstract：The mass fraction of copper in intermediate product of copper smelting (i.e., crude copper) is more than 97.5%. Moreover, the crude copper usually contains several impurity elements such as arsenic, antimony, iron, lead, zinc and tin. During the determination of copper in crude copper by X-ray fluorescence spectrometry (XRF), too high content of copper will lead to the deterioration of linearity between XRF intensity and copper content. Meanwhile, the difference of sample in finish degree and density can also cause the determination results of copper content to deviate from the true value. The crude copper production samples with content gradient of each element were firstly selected, and various chemical wet methods were used to determine the content of each element. On the premise of optimizing the determination conditions of XRF, the determination method of copper and 13 kinds of impurity elements (sulfur, iron, antimony, bismuth, arsenic, lead, zinc, nickel, selenium, tin, silver, cobalt and tellurium) in crude copper by XRF was established after preparing samples by the means of lathes. The content of oxygen was provided by oxygen meter. Then the content of copper in crude copper could be calculated by subtraction method. The proposed method was applied for the determination of copper and 13 impurity elements in one crude copper sample. The relative standard deviations (RSD, n=11) of determination results were less than 5%. The contents of copper and 13 impurity elements in four copper samples were determined according to the experimental method, and the found results were compared with those obtained by chemical wet method. It was found that the determination results of impurities were consistent with those obtained by wet method. The calculated content of copper (the mass fractions were all higher than 97.5%) by subtraction method had little difference with those obtained by chemical wet method, which could fully meet the production requirements.
孙轲, 葛笑寒. X射线荧光光谱法用于粗铜中铜和13种杂质元素的测定[J]. 冶金分析, 2020, 40(4): 60-64.
SUN Ke, GE Xiao-han. Application of X-ray fluorescence spectrometry on the determination of copper and thirteen impurity elements in crude copper. , 2020, 40(4): 60-64.
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