PDF

Effect of Impurity Ions and Additives in Solution of Copper Electrorefining on the Passivation Behavior of Low-Grade Copper Anode

Kohei Mori, Yuta Yamakawa

2022encopperelectrolysispassivationadditivesimpurity

Abstract

Language:

Cu electrorefining using a low-grade copper anode is essential for energy efficiency in metallurgy. This study investigates the effects of various impurity ions and additives on the passivation behavior of low-grade copper anodes during copper electrolysis in an unagitated sulfate solution. Electrolytic experiments were conducted with varying concentrations of nickel, arsenic, bismuth, tin, antimony, and chloride ions. The findings revealed that the presence of 0.596 mol·dm¹3 Ni²+ significantly accelerated anode passivation, whereas As5+ and Bi3+ ions showed a minor effect. Additionally, while solutions containing thiourea extended the time to passivation slightly, increased thiourea concentration reduced passivation time dramatically. The viscosity coefficient of the solution increased with added Ni²+, impacting the diffusion coefficient of Cu²+ ions. The formation of a solid compound within the anode slime with added arsenic and bismuth also contributed to compactness and passivation phenomena, particularly with Cl⁻ ions above 1.13 mmol·dm¹3. These results underscore the complex role of impurities and additives in electrorefining processes, suggesting significant implications for optimizing copper recycling methods.

Download

Cite This Work

@article{2dbb34eb-bbb7-4547-9b8d-3fc56f040c33,
  title={Effect of Impurity Ions and Additives in Solution of Copper Electrorefining on the Passivation Behavior of Low-Grade Copper Anode},
  author={Kohei Mori and Yuta Yamakawa},
  year={2022},
  language={en}
}
TY  - JOUR
TI  - Effect of Impurity Ions and Additives in Solution of Copper Electrorefining on the Passivation Behavior of Low-Grade Copper Anode
AU  - Kohei Mori
AU  - Yuta Yamakawa
PY  - 2022
LA  - en
ER  -

Similar Items

Treatment of manufacturing scrap TV boar

The leachability tests for manufacturing scrap TV boards (STVB) have indicated the release of metals beyond the limit levels with potential problems f

2026enPDF

Extractive Metallurgy of Copper, Fifth Edition Mark E. Schlesinger, Matthew J. King, Kathryn C. Sole, ( WeLib.org )

Mark E. Schlesinger, Matthew J. King

This book presents a comprehensive overview of the principles and practices of copper extraction metallurgy. The objective is to provide both a theore

2026enPDF

729490895 TFC Jordi kayombo

Copper solvent extraction units at large hydrometallurgical plants face constraints in metal recovery, phase disengagement, and reagent consumption, d

2026enPDF

Effect of Roasting Temperature for Copper Leaching of Sulfide Concentrate by Combined Methods

Introduction Concerns over air pollution and the environmental problem of acid rain have made governments all over the world tighten their regulations

2023enPDF

Comparative study for leaching processes of uranium, copper and cadmium from gibbsite ore material of Talet Seleim, Southwestern, Sinai, Egypt

Walaa A. Kassab

In this paper, leaching characteristics are presented, and a cost-effective process for extracting uranium, copper, and cadmium from Talet Seleim’s Gi

2022enPDF

Advances in Thermochemical Synthesis and Characterization of the Prepared Copper/Alumina Nanocomposites

Marija Korac, Željko Kamberovic, Zoran Andic and Srecko Stopic

This paper presents thermochemical synthesis of copper/alumina nanocomposites in a Cu-Al2O3 system with 1–2.5 wt.% of alumina and their characterizati

2020enPDF