An experimental investigation of alkaline zinc electrowinning using magnesium alloy as cathode
This paper presents an experimental investigation of the novel alkaline zinc electrowinning process by using magnesium alloy as cathode and stainless steel as anode.The alkaline electrolyte with 40 g/L Zn2+ and 200 g/L NaOH was selected to be in accordance with the industrial practice.Effects of several electrolysis variables,i.e.current density (500,1000,1500 A/m2),temperature (30,50,70 ℃) and impurities (lead and tin) on the morphology of deposited zinc were investigated.The current efficiency was always 100％ and the deposited zinc always in powdery form.Specific energy was low,even at 1000 A/m2,and decreased with rising temperature,being only 2.27 kWh/kg Zn at 50 ℃,which was much lower than the energy consumption of 3.3-3.4 kWh/kg Zn in the conventional acidic electrowinning.
hazardous waste alkaline zinc electrowinning magnesium alloy cathode
Jiachao Jiang Chenglong Zhang Youcai Zhao
State Key Laboratory of Pollution Control and Resource Reuse,Tongji University,Shanghai 200092,China School of Urban Development and Environmental Engineering,Shanghai Second Polytechnic University,Sha
国际会议
哈尔滨
英文
2208-2211
2010-07-24（万方平台首次上网日期，不代表论文的发表时间）