Electric field and potential determination for electrowinning cells with bipolar electrodes by finite difference models

This paper is a contribution to the electric modeling of electrochemical cells. Specifically, cells for a new copper electrowinning process, which uses bipolar electrodes, are studied. Electrowinning is used together with solvent extraction and has gained great importance, due to its significant cos...

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Hauptverfasser: Bittner, R., Pagliero, A., Salazar, L., Valenzuela, M.
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container_end_page 1980 vol.3
container_issue
container_start_page 1973
container_title
container_volume 3
creator Bittner, R.
Pagliero, A.
Salazar, L.
Valenzuela, M.
description This paper is a contribution to the electric modeling of electrochemical cells. Specifically, cells for a new copper electrowinning process, which uses bipolar electrodes, are studied. Electrowinning is used together with solvent extraction and has gained great importance, due to its significant cost and environmental advantages, as compared to other copper reduction methods. Current electrowinning cells use unipolar electrodes connected electrically in parallel. Instead, bipolar electrodes, are connected in series. They are also called floating, because they are not wire-connected, but just immersed in the electrolyte. The main advantage of this technology is that, for the same copper production, a cell requires a much lower DC current, as compared with the unipolar case. This allows the cell to be supplied from a modular and compact PWM rectifier instead of a bulk high current thyristor rectifier, having a significant economic impact. In order to study the quality of the copper, finite difference algorithms in two dimensions are derived to obtain the distribution of the potential and the electric field inside the cell. Different geometrical configurations of cell and floating electrodes are analyzed. The proposed method is a useful tool for analysis and design of electrowinning cells, reducing the time-consuming laboratory implementations.
doi_str_mv 10.1109/IAS.1998.729872
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Specifically, cells for a new copper electrowinning process, which uses bipolar electrodes, are studied. Electrowinning is used together with solvent extraction and has gained great importance, due to its significant cost and environmental advantages, as compared to other copper reduction methods. Current electrowinning cells use unipolar electrodes connected electrically in parallel. Instead, bipolar electrodes, are connected in series. They are also called floating, because they are not wire-connected, but just immersed in the electrolyte. The main advantage of this technology is that, for the same copper production, a cell requires a much lower DC current, as compared with the unipolar case. This allows the cell to be supplied from a modular and compact PWM rectifier instead of a bulk high current thyristor rectifier, having a significant economic impact. In order to study the quality of the copper, finite difference algorithms in two dimensions are derived to obtain the distribution of the potential and the electric field inside the cell. Different geometrical configurations of cell and floating electrodes are analyzed. The proposed method is a useful tool for analysis and design of electrowinning cells, reducing the time-consuming laboratory implementations.</description><identifier>ISSN: 0197-2618</identifier><identifier>ISBN: 9780780349438</identifier><identifier>ISBN: 0780349431</identifier><identifier>EISSN: 2576-702X</identifier><identifier>DOI: 10.1109/IAS.1998.729872</identifier><language>eng</language><publisher>IEEE</publisher><subject>Copper ; Costs ; Electric potential ; Electrodes ; Environmental economics ; Production ; Pulse width modulation ; Rectifiers ; Solvents ; Thyristors</subject><ispartof>Conference Record of 1998 IEEE Industry Applications Conference. Thirty-Third IAS Annual Meeting (Cat. 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The main advantage of this technology is that, for the same copper production, a cell requires a much lower DC current, as compared with the unipolar case. This allows the cell to be supplied from a modular and compact PWM rectifier instead of a bulk high current thyristor rectifier, having a significant economic impact. In order to study the quality of the copper, finite difference algorithms in two dimensions are derived to obtain the distribution of the potential and the electric field inside the cell. Different geometrical configurations of cell and floating electrodes are analyzed. The proposed method is a useful tool for analysis and design of electrowinning cells, reducing the time-consuming laboratory implementations.</abstract><pub>IEEE</pub><doi>10.1109/IAS.1998.729872</doi></addata></record>
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ispartof Conference Record of 1998 IEEE Industry Applications Conference. Thirty-Third IAS Annual Meeting (Cat. No.98CH36242), 1998, Vol.3, p.1973-1980 vol.3
issn 0197-2618
2576-702X
language eng
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source IEEE Electronic Library (IEL) Conference Proceedings
subjects Copper
Costs
Electric potential
Electrodes
Environmental economics
Production
Pulse width modulation
Rectifiers
Solvents
Thyristors
title Electric field and potential determination for electrowinning cells with bipolar electrodes by finite difference models
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