|About this Abstract
||Part C-1: Hydrometallurgy 2018
||Pb-Ca-Sn Anode Potential as a Function of Cobalt, Iron and Manganese in Synthetic Sulfuric Acid Electrolytes
||Charles E. Abbey, Michael Scott Moats
|On-Site Speaker (Planned)
||Charles E. Abbey
Cobalt, iron and manganese play various roles in copper electrowinning using lead-calcium-tin alloyed anodes. Cobalt catalyses electrochemical water decomposition resulting in lower anode potential and reduced corrosion rates. Iron reduces cathodic current efficiency, but is required in the electrolyte to reduce higher oxidation states of manganese that oxidize organics in solvent extraction. The effect of the combined interaction of these three metal ions on the anode potential has not been quantified yet. The current work used a three factor, three level, three replicates central composite design of experiments to analyse the effects and potential interactions between cobalt, iron and manganese. The experiments consisted of chronopotentiometric analysis to assess the anode potential. High [Co], low [Mn] and either high or low [Fe] yielded lower anode potentials. Two regression models were developed to predict anode potential as a function of [Co], [Fe] and [Mn].
||Planned: At-meeting proceedings