Behavior of arsenic in zinc electrowinning
(1. Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology,
Kunming 650093, China;
2. Technology Center of Yunnan Metallurgy Group Co., Kunming 650031, China)
Kunming 650093, China;
2. Technology Center of Yunnan Metallurgy Group Co., Kunming 650031, China)
Abstract: The effects of arsenic on the cathode polarization process in zinc electrowinning, its kinetics equation, parameters and polarization mechanism were studied by multiple electrochemistry approaches. The experimental results show that, if [As3+]≥3 mg/L, electrowinning first enters into stationary passivation range, and then enters into precipitation range, which indicates that the depolarization function of impurity arsenic is zinc electrowinning.
Key words: zinc electrowinning; arsenic; cathode polarization; kinetics equation; parameters