|About this Abstract
||Part C-1: Hydrometallurgy 2018
||Regulatory Mechanism of Anode Slime Behavior
||Weizhi Zeng, Michael L. Free, Shijie Wang
|On-Site Speaker (Planned)
In order to examine the effects of operating parameters on anode slime behavior and study its regulatory mechanism, a series of pilot-scale copper electrorefining tests was performed at the Rio Tinto Kennecott Copper Tankhouse. Tested anodes with known impurity compositions were observed under SEM/EDS for inclusion characterization, while the harvested copper cathodes were analyzed by DC Arc for impurity concentrations. In addition, slimes adhered to and released from the anode were weighed and analyzed by ICP for compositions respectively. It was demonstrated that Pb/As ratio in copper anode has significant effects on slime particles’ sintering and coalescence; high current density tends to intensify the coalescence of slimes and dissolve part of the particles, leading to improved anode slime adhesion and cathode purity; wider cathode blank results in larger anodic current density, thus better slime particle coalescence; small flow rate was correlated with anode passivation, which increases in-situ anode temperatures and affect the coalescence of slime particles.
||Planned: At-meeting proceedings