Industrial On-line ICP-OES Analysis of Copper, Cadmium, Cobalt and Iron in Hydrometallurgical Zinc Sulfate Solution

YAN Yu; HAN Nai-xu; LU Shui-miao; XIA Xiao-feng; LIN Li; ZHANG Xiu-li

doi:10.15898/j.cnki.11-2131/td.202107200080

Rock and Mineral Analysis > 2022 > 41(1): 153-159. > DOI: 10.15898/j.cnki.11-2131/td.202107200080

YAN Yu, HAN Nai-xu, LU Shui-miao, XIA Xiao-feng, LIN Li, ZHANG Xiu-li. Industrial On-line ICP-OES Analysis of Copper, Cadmium, Cobalt and Iron in Hydrometallurgical Zinc Sulfate Solution[J]. Rock and Mineral Analysis, 2022, 41(1): 153-159. DOI: 10.15898/j.cnki.11-2131/td.202107200080

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Industrial On-line ICP-OES Analysis of Copper, Cadmium, Cobalt and Iron in Hydrometallurgical Zinc Sulfate Solution

1.
The 404 Company, China National Nuclear Industry Corporation, Lanzhou 732850, China
2.
Hangzhou Puyu Technology Development Co., Ltd, Hangzhou 311300, China

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Received Date: July 19, 2021
Revised Date: August 26, 2021
Accepted Date: September 20, 2021
Published Date: January 27, 2022

Abstract

HIGHLIGHTS
(1) The on-line detection of impurity elements can be determined by utilizing the impurity removal process of wet smelting and the characteristics of zinc sulfate solution.

(2) The factory automated analysis system can replace traditional manual sampling analysis method by optimizing the instrument parameters.

(3) Spectral interference, linear range, detection limit, and recovery verify the accuracy of the analysis results.

ABSTRACT

BACKGROUNDThe determination of impurity elements in hydrometallurgical zinc sulfate solution is helpful to optimize the composition of electrolytes, reduce energy consumption, and accurately feed and improve the purity of smelting metal. Impurity elements in the wet zinc smelting process are usually determined by manual sampling. The sample needs to be diluted before the equipment analysis is performed due to high content of zinc and sulfuric acid, which is difficult to achieve automatic analysis.
OBJECTIVESIn order to determine the online analysis of impurity elements in the solution of zinc smelting process and meet the current requirements of the hydrometallurgical industry.
METHODSAn automatic industrial on-line filtration/dilution combined with inductively coupled plasma-optical emission spectrometry (ICP-OES) was used. By optimizing key parameters and selecting appropriate analysis lines, a method for the rapid determination of copper, cadmium, cobalt and iron in zinc smelting solution was developed.
RESULTSThe experimental results showed that the linear relationship of each element was good, the correlation coefficient was greater than 0.9998, the relative standard deviation was 0.72%-1.39% (n=6), and the spiked recovery was 95%-110%.
CONCLUSIONSThe factory on-line automatic analysis system can replace traditional manual sampling to achieve automatic analysis. The results of on-line analysis are compared with those of manual sampling in actual production, showing good consistency. This method can be used to fully achieve automatic analysis, simple operation, accurate and reliable results, and is suitable for the analysis of impurity elements in zinc smelting.

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References (30)

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Industrial On-line ICP-OES Analysis of Copper, Cadmium, Cobalt and Iron in Hydrometallurgical Zinc Sulfate Solution

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