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Removal of Sb Impurities in Copper Electrolyte and Evaluation of As and Fe Species in an Electrorefining Plant

Ana I. González de las Torres, Michael S. Moats

2021encopperelectrolyteantimonyarsenicion exchange

Abstract

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This study investigates the impact of antimony and arsenic concentrations and their oxidation states (Sb(III), Sb(V), As(III), As(V)) on copper cathode quality during electrorefining processes, specifically due to the formation of floating slimes. A laboratory-scale pilot plant was established to optimize the removal of Sb from commercial copper electrolyte through a two-step process that included a pre-treatment phase utilizing copper shavings followed by ion exchange methods. Results demonstrated that Sb(III) was effectively eliminated from the electrolyte, while Sb(V) showed partial removal. Importantly, the concentrations of As(III) and As(V) remained unchanged, and the challenge of ion exchange resin poisoning by Fe(III) was mitigated by prior reduction of iron to Fe(II) using copper shavings. This innovative operation configuration yielded insights into enhancing the performance of electrorefining plants by improving electrolyte quality, thus contributing to the overall efficiency in copper production processes.

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Cite This Work

@article{972b8d5d-671e-4113-9cd8-453eb33081b3,
  title={Removal of Sb Impurities in Copper Electrolyte and Evaluation of As and Fe Species in an Electrorefining Plant},
  author={Ana I. González de las Torres and Michael S. Moats},
  year={2021},
  language={en}
}
TY  - JOUR
TI  - Removal of Sb Impurities in Copper Electrolyte and Evaluation of As and Fe Species in an Electrorefining Plant
AU  - Ana I. González de las Torres
AU  - Michael S. Moats
PY  - 2021
LA  - en
ER  -

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