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Effect of rolling technologies on the properties of Pb-0.06wt%Ca-1.2wt%Sn alloy anodes during copper electrowinning

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Abstract

The objective of this work was to study the effect of different rolling technologies on the properties of Pb-0.06wt%Ca-1.2wt%Sn anodes during copper electrowinning and to determine the relationship between the properties of the anodes and rolling techniques during copper electrowinning. The anode process was investigated via anodic polarization curves, cyclic voltammetry curves, electrochemical impedance spectra, and corrosion tests. The microscopic morphology and phase composition of the anodic oxide layers were observed by scanning electron microscopy and X-ray diffraction, respectively. Observable variations in the electrocatalytic activity and reaction kinetics of anodes during electrowinning indicated that the electrochemical behavior of the anodes was strongly affected by the rolling technology. An increase in the rolling number tended to decrease the oxygen evolution overpotential and the corrosion rate of the anodes. These trends are contrary to that of the apparent exchange current density. Furthermore, the intensities of diffraction peaks associated with PbO, PbOx, and α-PbO2 tended to increase with increasing rolling number. In addition, the rolled anodes exhibited a more uniform microstructure. Compared with one-way rolled anodes, the eight-time cross rolled anodes exhibited better electrocatalytic activity and improved corrosion resistance.

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Authors and Affiliations

  1. Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology, Kunming, 650093, China

    Jian Yang, Bu-ming Chen, Hui Hang, Zhong-cheng Guo & Shuai Wang

  2. Kunming Hendera Science and Technology Co., Ltd., Kunming, 650106, China

    Zhong-cheng Guo

Authors
  1. Jian Yang
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  2. Bu-ming Chen
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  3. Hui Hang
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  4. Zhong-cheng Guo
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  5. Shuai Wang
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Correspondence to Bu-ming Chen.

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Yang, J., Chen, Bm., Hang, H. et al. Effect of rolling technologies on the properties of Pb-0.06wt%Ca-1.2wt%Sn alloy anodes during copper electrowinning. Int J Miner Metall Mater 22, 1205–1211 (2015). https://doi.org/10.1007/s12613-015-1186-8

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  • DOI: https://doi.org/10.1007/s12613-015-1186-8

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