Opening book details…
Can I read Electrowinning of Zinc from Alkaline Solutions on EtoBox?
Electrowinning of Zinc from Alkaline Solutions by Jean St-Pierre; Dominique L. Piron is a Engineering article available to read on EtoBox.
What is Electrowinning of Zinc from Alkaline Solutions about?
The objective of this work was to determine the best conditions for minimizing energy consumption in zinc electrowinning from alkaline solutions. The effects of several variables, i.e. hydroxide concentration (300-500 g l-~), current density (50-1000 A m-2), temperature (24-74 ~ C), cathode material (magnesium, nickel, lead, stainless steels 304 and 316) and impurities (copper and arsenide) on current efficiency and cell voltage were investigated. The current efficiency was always t00% on magnesium except in the presence of arsenide (78% at 100 mg 1 ~). With cathode materials such as stainless steels 304 and 316, nickel and lead, hydrogen evolution was observed at the beginning of electrolysis. Hydroxide concentration did not have a significant effect on cell voltage. Specific energy was low, even at 1000 Am -2, and decreased with rising temperature, being only 2.17 kWh kg ~ at 74 ~ C. No redissolution of the deposit was observed. Decreasing distance between electrodes and using active anodes permitted a further reduction of specific energy to 1.75 kWh kg -~. Decreasing space between electrodes was possible as no dendritic deposits were observed.
Who reads Electrowinning of Zinc from Alkaline Solutions?
It is typically read by researchers, students, and practitioners in Engineering.
- Author
- Jean St-Pierre; Dominique L. Piron
- Published
- 1986
- Language
- EN
- Field
- Engineering (Physical Sciences)