alkaline electrowinning of zinc


  • Electrowinning of zinc from alkaline solutions | SpringerLink

    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 gl −1), current density ...


  • Electrowinning of Non-Noble Metals with Simultaneous ...

    fecting the electrowinning of zinc from alkaline zincate solutions with simultaneous hydrogen evolution at flow- through porous electrodes, but offered no theoretical inter-


  • A Mathematical Model of a Zinc Electrowinning Cell

    A detailed fundamental model of a zinc electrowinning cell has been developed and validated for both steady state and dynamic simulations. This model was used to investigate the effects of a range of operating variables and to find their optimum values. As well as providing useful design information for a


  • Extraction of Zinc and Manganese from Alkaline and Zinc ...

    Toro et al. developed a patented process for the recycling of alkaline and zinc-carbon spent batteries, where the metals are leached in acid solution in the presence of carbohydrates as reducing agents; after purification of solution, metallic zinc and manganese dioxide are recovered by electrowinning.


  • PRODUCTION OF ZINC POWDER FROM Co-Zn …

    zinc, followed by zinc electrowinning process. As a results, a solution was obtained from alkaline leaching under the optimum condition of 75 °C, sodium hydroxide of 8 M, solid-to-liquid ratio dm 3 of


  • Zinc - Wikipedia

    Powdered zinc is used in this way in alkaline batteries and the case (which also serves as the anode) of zinc–carbon batteries is formed from sheet zinc. [108] [109] Zinc is used as the anode or fuel of the zinc-air battery /fuel cell.


  • Removal of Tin from Alkaline Zinc Solution by Zinc Powder ...

    Abstract: In this work, the influence of tin on electrowinning of zinc from alkaline solution was observed. Tin changed the deposited zinc into compact form, made zinc hardly peel off from cathodes and should be separated from alkaline electrolyte before zinc electrowinning.


  • Metallurgical processing of zinc-bearing residues | TU ...

    (6) Electrowinning of zinc in NaOH solution: the purified zinc bearing solutions are subsequently precipitated to the final product of Zn metal. Optimal operating conditions for the processes are deduced from a literature review in which similar residues are processed.


  • Effects of impurities ions on Zinc Electrowinning …

    Effects of impurities ions on Zinc Electrowinning process in Alkaline Leaching Guo-dong ZHAO School of Resources and safety Engineering. Central South University, CSU


  • The effects of arsenic and lead impurities on the current ...

    The influence of lead and arsenic impurities on zinc deposition, current efficiency and deposit composition was examined in the alkaline zinc electrowinning system. It was observed that lead slightly decreases the current efficiency of zinc deposition, and that the detrimental effect on zinc …


  • On the electrowinning of zinc from alkaline zincate ...

    The cathode current efficiency for the electrowinning of Zn is determined under conditions of 2 to 8M alkali concentration, current density 10 …


  • Alkaline leaching of iron and steelmaking dust - University

    to alkaline leaching zinc ferrites can be decomposed and leaching of zinc could be improved. Keywords BF dust, BOF dust, EAF dust, NaOH leaching, zinc recovery ISBN (printed) 978-952-60-4462-0 ISBN (pdf) 978-952-60-4463-7


  • THE DEVELOPMENT AND IMPLEMENTATION OF INDUSTRIAL ...

    This zinc concentrate is sent to the Clarksville Zinc Refinery where the zinc is leached from the sphalerite using a weak acid leach process, electrowon, melted, and poured into high purity zinc ingots (>99.99% zinc).


  • Metallurgical processing of zinc-bearing residues | TU ...

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  • ELECTROWINNING OF ZINC FROM AMMONIA AND …

    Electrowinning of zinc from ammonia and glycerol with glycerol varying from 0 ... electrowinning, zinc powder, stability, SEM, particle size, Avrami-Erofeyev kinetics ... studied the advantage of the alkaline electrowinng over the acidic electrowinning process as it reduces the energy cost.


  • A laboratory-scale investigation of alkaline zinc ...

    A laboratory-scale investigation of alkaline zinc electrowinning Effects of electrolysis conditions on the morphology of deposited zinc were also studied. The composition of the electrolyte was selected to be in accordance with the industrial practice, 25 g/l Zn 2+ and 240 g/l NaOH.


  • Zinc Extraction from Zinc Plants Residue Using …

    ORIGINAL CONTRIBUTION Zinc Extraction from Zinc Plants Residue Using Selective Alkaline Leaching and Electrowinning Pedram Ashtari • Parviz Pourghahramani Received: 18 November 2014/Accepted: 25 February 2015/Published online: 27 …


  • PRODUCTION OF ULTRAFINE ZINC POWDER …

    Abstract - Production of ultrafine zinc powder from industrial wastes by electrowinning in alkaline solution was studied. Stainless steel and magnesium electrodes were used as anode and cathode, respectively.


  • Removal of nickel, copper, zinc and chromium from ...

    Removal of nickel, copper, zinc and chromium from synthetic and industrial wastewater by electrocoagulation ... electrowinning (Bolger . Removal of nickel, copper, zinc and chromium from synthetic and industrial wastewater by electrocoagulation ... The decrease in removal efficiency at strong acidic and alkaline pH was described by other ...


  • zinc electrowinnng grinding - mountainboards.co.za

    May 25, 2017· Introduction: Electrowinning of Zinc for the anode of Rechargeable - UWSpaceAnd all electrowinning Zn anodes are relatively stable compare to acid is often sufficiently strong to make fine grinding unnecessary.


  • US5958210A - Efficient electrowinning of zinc from ...

    Zinc-air batteries, for example, use an alkaline electrolyte, and an alkaline electrowinning cell would regenerate both the zinc particles and the alkaline electrolyte. Another example is the degalvanizing of (i.e., removal of zinc from) galvanized steel scrap, which is …


  • Pollution Control and Resource Reuse for Alkaline ...

    Topics focus on leaching of zinc and lead hazardous wastes, purification of leach solution of zinc and lead, electrowinning of zinc and lead from purified alkaline solutions, chemical reactions taking place in the production flowsheets, thermodynamic and spent electrolyte regeneration, alkaline hydrometallurgy of low-grade smithsonite ores ...


  • Production of ultrafine zinc powder from wastes containing ...

    ABSTRACT. Production of ultrafine zinc powder from industrial wastes by electrowinning in alkaline solution was studied. Stainless steel and magnesium electrodes were …


  • ELECTROWINNING OF ZINC FROM AMMONIA …

    Electrowinning of zinc from ammonia and glycerol with glycerol varying from 0 ... electrowinning, zinc powder, stability, SEM, particle size, Avrami-Erofeyev kinetics ... studied the advantage of the alkaline electrowinng over the acidic electrowinning process as it reduces the energy cost.


  • Effects of impurities ions on Zinc Electrowinning process ...

    Effects of impurities ions on Zinc Electrowinning process in Alkaline Leaching Guo-dong ZHAO School of Resources and safety Engineering. Central South University, CSU


  • On the Electrowinning of Zinc from Alkaline Zincate Solutions

    The cathode current efficiency for the electrowinning of zinc was determined under different conditions of alkali concentration (2–8M), current …


  • Electrowinning - GoldRefiningWiki

    Electrowinning is the process of extracting metals from a solution with the help of electricity. In an electrowinning cell, new metals are not dissolved from the anode as in electrolytic refining.The anode is inert and isn't consumed by the process.


  • Selective zinc alkaline leaching optimization ... - DeepDyve

    Read "Selective zinc alkaline leaching optimization and cadmium sponge recovery by electrowinning from cold filter cake (CFC) residue, Hydrometallurgy" on DeepDyve, the largest online rental service for scholarly research with thousands of academic publications available at your fingertips.