Treatment of nickel electrowinning anode solution by nanofiltration coupled with electrodialysis |
Authors: Xu qiang,Wang xiaozhen,Zhang pengyun,Wang yingping |
Units: 1.Gansu Membrane Science and Technology Research Institute of Co. ,Ltd.,Gansu Research Center of Membrane Separation Engineering Technology;Lanzhou 730020, China |
KeyWords: Nickel anodic electrolyte,Electrodialysis,acid salt separation,nanofiltration |
ClassificationCode:X758 |
year,volume(issue):pagination: 2021,41(5):130-138 |
Abstract: |
In order to reduce the Na2CO3 consumption of nickel electrowinning, the coupling technologies of nanofiltration and electrodialysis ware used to separate acid-salt from the anodic solution and recover the dilute acid.. The nickel sulfate in the anodic solution was separated from the sulfuric acid by special nanofiltration membrane, followed by the dilute acid being concentrated and reused by electrodialysis. The results show that under the conditions of feed temperature of 55℃, operating pressure 3.5 MPa and flow rate of 1000L/h, the retention rate of nickel ion and the removal rate of hydrogen ion were 91.36% and 73.07% respectively.There was a good separation effect for acid-salt by nanofiltration. Electrodialysis can concentrate the separated dilute acid. A maximum concentration of sulfuric acid was increased by 4.3 times to 33.8 g/L. The anode liquor of nickel electrowinning was treated by nanofiltration coupled with electrodialysis, showing advantages of no waste water discharge and good economic and environmental benefits. |
Funds: |
甘肃省重点研发计划项目工业类(20YF3GA004) |
AuthorIntro: |
徐强(1981-),男,工程师,研究方向:膜分离技术应用, |
Reference: |
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