Development of highly productive current modes for copper electrowinning as a dense metal

Authors

  • Ольга Владимировна Линючева National Technical University of Ukraine "Kyiv Polytechnic Institute" Peremogi, 37, Bldg. 4, Kiev, 03056, Ukraine https://orcid.org/0000-0003-4181-5946
  • Маргарита Ивановна Донченко National Technical University of Ukraine "Kyiv Polytechnic Institute" Peremogi, 37, Bldg. 4, Kiev, 03056, Ukraine https://orcid.org/0000-0002-5366-8122
  • Дмитрий Юрьевич Ущаповский National Technical University of Ukraine "Kyiv Polytechnic Institute" Peremogi, 37, Bldg. 4, Kiev, 03056, Ukraine https://orcid.org/0000-0002-2809-2774
  • Михаил Владимирович Бык National Technical University of Ukraine "Kyiv Polytechnic Institute" Peremogi, 37, Bldg. 4, Kiev, 03056, Ukraine https://orcid.org/0000-0003-0322-167X
  • Денис Николаевич Складанный National Technical University of Ukraine "Kyiv Polytechnic Institute" Peremogi, 37, Bldg. 4, Kiev, 03056, Ukraine https://orcid.org/0000-0003-3624-5336

DOI:

https://doi.org/10.15587/1729-4061.2014.30660

Keywords:

limited current density, migration, copper sulfate, polarization curves, deposit morphology, productivity of the process

Abstract

Electrochemical studies of copper planting from sulfuric acid solutions, the composition of which varies during the electrowinning process in order to increase its productivity and reduce power consumption for copper production were carried out in the paper. It was found that at reducing the copper sulfate concentration (Cc) from 200 to 40 g/dm2 and increasing acid concentration (Ca) from 30 to 90 g/dm2, the role of migration of copper ions in the mass transfer is low, but the solution acidity does affect the limiting current of copper deposition iL. The dependences of iL on two variables - Cc and Ca were experimentally found and mathematically described, which was the basis for selecting the working current densities (ip) of the copper electrowinning process. The influence of the solution composition and the current density on the cathode copper morphology was investigated. It is shown that the compact deposits without dendrites and powder can be obtained at a ratio of ір/iL=0,825. Electrolysis modes with cathodic current density reduction in time were developed, which allow to combine the high speed of the process, a high metal current efficiency and obtaining a dense copper precipitate with the quality, acceptable for hydrometallurgy. Results and proposed approach to optimizing copper electrowinning parameters can be used in hydrometallurgy for metallic copper production, in processes of copper extraction from production wastes, wastewater purification from metal ions.

Author Biographies

Ольга Владимировна Линючева, National Technical University of Ukraine "Kyiv Polytechnic Institute" Peremogi, 37, Bldg. 4, Kiev, 03056

Doctor of Technical Sciences, Professor

Department of Electrochemical Productions Technology

 

Маргарита Ивановна Донченко, National Technical University of Ukraine "Kyiv Polytechnic Institute" Peremogi, 37, Bldg. 4, Kiev, 03056

Doctor of Technical Sciences, Senior Researcher

Department of Electrochemical Productions Technology

Дмитрий Юрьевич Ущаповский, National Technical University of Ukraine "Kyiv Polytechnic Institute" Peremogi, 37, Bldg. 4, Kiev, 03056

graduate student

Department of Electrochemical Productions Technology

Михаил Владимирович Бык, National Technical University of Ukraine "Kyiv Polytechnic Institute" Peremogi, 37, Bldg. 4, Kiev, 03056

PhD, Associate Professor

Department of Electrochemical Productions Technology

 

Денис Николаевич Складанный, National Technical University of Ukraine "Kyiv Polytechnic Institute" Peremogi, 37, Bldg. 4, Kiev, 03056

PhD, Associate Professor

Department of Cybernetics Chemical Technology Processes

 

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Published

2014-12-11

How to Cite

Линючева, О. В., Донченко, М. И., Ущаповский, Д. Ю., Бык, М. В., & Складанный, Д. Н. (2014). Development of highly productive current modes for copper electrowinning as a dense metal. Eastern-European Journal of Enterprise Technologies, 6(6(72), 48–55. https://doi.org/10.15587/1729-4061.2014.30660

Issue

Section

Technology organic and inorganic substances