Year: 2024
Type: article
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.
Source: Metals
DOI: 10.3390/met14040457
Authors: Xiaoyu Wang, chun Li, Jun Tie, Yi Meng, Guanlin Li, Xiaowen Qiu
Institution: North China University of Technology
Language: English
Subfield: Mechanical Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: gold
Estimated APC paid: $2,955
Awards: G6182059912, G8731213007
OpenAlex ID: W4394749577