Affiliation:
1. North China University of Technology
Abstract
Abstract
As one of the main factors decreasing current efficiency and product quality, the growth of nodules deserves attention in the copper electrorefining process. 3D FEM models combining tertiary current distribution and fluid flow were established in this study to investigate the details of the growth of columnar nodules, including the electrolyte flow around the nodule and its effects. Compared with an inert nodule, a significant impact of the electrochemical reaction of an active nodule has been observed on the fluid flow, which may be one of the reasons for the formation of small nodule clusters on the cathode. Furthermore, the local current density isn't even on the nodule surface under the comprehensive influence of local electrolyte flow, local overvoltage, and the angle with the anode surface. Thus, the head of an active nodule grows faster than the root, and the upper parts grow faster than the lower parts, leading to asymmetric growth of the nodules.
Publisher
Research Square Platform LLC
Reference26 articles.
1. Schlesinger E, King J, Sole C, Davenport G (2011) In:, Extractive Metallurgy of Copper (Fifth Edition)Electrolytic Refining. Pergamon, Oxford, pp 251–280
2. Nodulation of electrodeposited copper due to suspended particulate;Andersen TN;J Appl Electrochem,1983
3. Dutrizac JE, Chen TT (1999) A mineralogical study of nodulated copper cathodes.J proc copper int.conf, 383–403
4. Wang ZR, Meng Y, Li C, Tie J, Zhao RT (2023) Effect of nodules on electrolyte flow and Cu2+ concentration distribution in copper electrolytic refining. Advances in Energy, Environment and Chemical Engineering-Abdullah&Osman(Eds), pp 309–313
5. Cathodic current change and nodulation morphology during short circuit of copper electrolysis;Meng Y;Chin J Nonferrous Met,2022