The effect of organic impurities and additive on nickel electrowinning and product quality

Freire, N.H.J.; Majuste, D.; Angora, M.A.; Ciminelli, Virgínia S. T.

doi:10.1016/j.hydromet.2016.12.009

Cited by 16 publications

(3 citation statements)

References 28 publications

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“…В гидрометаллургии довольно часто используют органические реагенты и поверхностноактивные вещества (ПАВ), например при электролизе для создания плотной пены на поверхности ванны [1,2] или для получения порошков заданной крупности [3][4][5][6][7]. При автоклавной переработке сульфидного цинкового сырья ПАВ также часто применяются для снижения смачиваемости минералов расплавленной серой, образующейся в процессе выщелачивания [8][9][10].…”

Section: Introductionunclassified

Study into the effect of sodium lignosulfonate, anionic surfactants and their mixtures on the rate of copper ion cementation by zinc

Kolmachikhina

Sviridov

Naumov

2020

Izv.VUZ. Tsvet. Met.

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The article focuses on the effect of sodium lignosulfonate (LS), anionic surfactants (sodium dodecylsulfate (SDS), sodium dodecylbenzene sulfonate (SDBS)), and their mixtures on the rate of copper cementation by zinc. The results obtained demonstrate a decrease in copper cementation rate with the increasing LS and SDBS concentrations. There was also excessive zinc consumption for copper ion cementation noted due to LS and SDBS anion adsorption on positively charged zinc cathodic areas of the cementing agent and the precipitate. This led to a decrease in the rate of copper particle nucleation, energy consumption for forming new copper nucleation centers, and conditions for hydrogen overpotential reduction. In addition, rising temperature led to a decrease in zinc consumption in the presence of LS. Surfactants under investigation may be ranked by the negative impact on copper ion cementation in an ascending order as follows: SDS < SDBS < LS. LS + SDS mixture testing showed its irregular effect on copper cementation rate at test temperatures. Experiments with LS and SDBS mixtures demonstrated a linear decrease in copper ion cementation rate with increasing SDBS concentration and simultaneously rising zinc consumption. Due to the negative impact of investigated reagents discovered, we proposed a method for removing organic impurities from solutions using multilayered aluminosilicates modified by cationic surfactants. The results obtained indicate the high effectiveness of organic impurity removal from solutions providing for a 50 % increase in cementation rate in the presence of LS + SDBS mixture together with a decrease in zinc consumption.

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Section: Introductionunclassified

Study into the effect of sodium lignosulfonate, anionic surfactants and their mixtures on the rate of copper ion cementation by zinc

Kolmachikhina

Sviridov

Naumov

2020

Izv.VUZ. Tsvet. Met.

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“…In hydrometallurgical industries, significant amounts of impurities − and some additives − are present in the base metal (Cu, Ni, Zn)-rich process solutions. The presence of such contaminants can be either detrimental to the process/base metal product or beneficial as they help improve process operation and feasibility.…”

Section: Introductionmentioning

confidence: 99%

Platinum Recovery from Industrial Process Solutions by Electrodeposition–Redox Replacement

Halli

Heikkinen

Elomaa

et al. 2018

ACS Sustainable Chem. Eng.

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In the current study, platinum—present as a negligible component (below 1 ppb, the detection limit of the HR-ICP-MS at the dilutions used) in real industrial hydrometallurgical process solutions—was recovered by an electrodeposition–redox replacement (EDRR) method on pyrolyzed carbon (PyC) electrode, a method not earlier applied to metal recovery. The recovery parameters of the EDRR process were initially investigated using a synthetic nickel electrolyte solution ([Ni] = 60 g/L, [Ag] = 10 ppm, [Pt] = 20 ppm, [H2SO4] = 10 g/L), and the results demonstrated an extraordinary increase of 3 × 105 in the [Pt]/[Ni] on the electrode surface cf. synthetic solution. EDRR recovery of platinum on PyC was also tested with two real industrial process solutions that contained a complex multimetal solution matrix: Ni as the major component (>140 g/L) and very low contents of Pt, Pd, and Ag (i.e., <1 ppb, 117 and 4 ppb, respectively). The selectivity of Pt recovery by EDRR on the PyC electrode was found to be significant—nanoparticles deposited on the electrode surface comprised on average of 90 wt % platinum and a [Pt]/[Ni] enrichment ratio of 1011 compared to the industrial hydrometallurgical solution. Furthermore, other precious metallic elements like Pd and Ag could also be enriched on the PyC electrode surface using the same methodology. This paper demonstrates a remarkable advancement in the recovery of trace amounts of platinum from real industrial solutions that are not currently considered as a source of Pt metal.

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“…for copper, nickel or zinc deposition on the permanent or seed plate cathode. Hydrometallurgical process streams differ typically from synthetic plating baths, as they contain a huge variety of base metal ions, impurities and also precious metal ions [8][9][10][11][12][13][14][15][16][17][18][19][20][21]. Typically, valuable metals such as Ag are present at ppb-ppm level, making their selective recovery challenging.…”

Section: Introductionmentioning

confidence: 99%

A future application of pulse plating – silver recovery from hydrometallurgical bottom ash leachant

Elomaa

Halli

Sirviö

et al. 2018

Transactions of the IMF

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In the current study, electrodeposition-redox replacement was applied for hydrometallurgical solution with the main elements of Ca (13.8 g/L), Al (4.7 g/L), Cu (2.5 g/L), Zn (1.2 g/L), Fe (1.2 g/L), S (1 g/L), Mg (0.8 g/L), P (0.5 g/L) and Ag (3.5 ppm). The solution originated from the leaching experiment of incinerator plant bottom ash, which was dissolved into 2 M HCl media at T = 30 °C. The resulting deposit on electrode surface was analysed with SEM-EDS and the observed Ag/(Cu+Zn) ratio (0.3) indicated remarkable enrichment of silver on the surface, when compared to the ratio of these elements (Ag/(Cu+Zn)) in the solution (6.8•10-5). The enrichment of Ag vs. (Cu+Zn) could be demonstrated to increase ca. 4500 fold compared to ratio of the elements in solution.

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The effect of organic impurities and additive on nickel electrowinning and product quality

Cited by 16 publications

References 28 publications

Study into the effect of sodium lignosulfonate, anionic surfactants and their mixtures on the rate of copper ion cementation by zinc

Study into the effect of sodium lignosulfonate, anionic surfactants and their mixtures on the rate of copper ion cementation by zinc

Platinum Recovery from Industrial Process Solutions by Electrodeposition–Redox Replacement

A future application of pulse plating – silver recovery from hydrometallurgical bottom ash leachant

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