ELECTROMETALLURGY | |
Название | The influence of surface-active substances on anode polarization in Cu electrorefining |
DOI | 10.17580/tsm.2015.06.14 |
Автор | Shulga E. V., Ryabushkin A. I., Devochkin A. I., Yure A. I. |
Информация об авторе | Polar Division of MMC “Norilsk Nikel”, Norilsk, Russia: E. V. Shulga, Chief Specialist of Center of Engineering Maintenance of Production, e-mail: shulgaev@nk.nornik.ru |
Реферат | The influence of the surface-active substances used as additives in Cu electrorefining on anode polarization was studied. Anode polarization curves for various concentrations of colloidal additives were presented in Tafel (semi-logarithmic) form. It was established that anode polarization decreases with the increase of thiourea concentration in electrolyte due to the complexes promoting Cu anode dissolution in the anode vicinity. On the contrary, higher concentration of hide glue enhances anode polarization in electrolyte caused by adsorption layer on the electrode surface that inhibits the reaction of Cu anode dissolution. Higher concentration of Aviton surface-active substances demonstrated the similar effect on anode process kinetics. Production tests didn’t show the positive influence of the surface-active substances on anodic current efficiency. The researches proved that all the surface-active substances used in Cu electrorefining react in anode process. Moreover, the rate and the direction of their effect vary. Thiourea leads to anode depolarization while hide glue and Aviton inhibit it. |
Ключевые слова | Colloidal mode, surface-active substances, hide glue, thiourea, aviton, anode polarizaion, adsorbtion of surface-active substances |
Библиографический список | 1. Minotas J. C., Djellab H., Ghali E. Anodic behavior of copper electrodes containing arsenic or antimony as impurities. Journal of Applied Electrochemistry. 1989. Vol. 19, No. 5. pp. 777–783. |
Language of full-text | русский |
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