Modeling the effect of composition and temperature on the conductivity of synthetic copper electrorefining electrolyte

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Modeling the effect of composition and temperature on the conductivity of synthetic copper electrorefining electrolyte. / Kalliomäki, Taina; Aromaa, Jari; Lundström, Mari.

In: Minerals, Vol. 6, No. 3, 59, 01.09.2016, p. 1-11.

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@article{164ed6805e3a45feb7515cddfd7afe33,
title = "Modeling the effect of composition and temperature on the conductivity of synthetic copper electrorefining electrolyte",
abstract = "The physico-chemical properties of the copper electrolyte significantly affect the energy consumption of the electrorefining process and the quality of the cathode product. Favorable conditions for electrorefining processes are typically achieved by keeping both the electrolyte conductivity and diffusion coefficient of Cu(II) high, while ensuring low electrolyte viscosity. In this work the conductivity of the copper electrorefining electrolyte was investigated as a function of temperature (50–70 ˚C) and concentrations of copper (Cu(II), 40–60 g/L), nickel (Ni(II), 0–20 g/L), arsenic (As(III), 0–30 g/L) and sulfuric acid (160–220 g/L). In total 165 different combinations of these factors were studied. The results were treated using factorial analysis, and as a result, four electrolyte conductivity models were built up. Models were constructed both with and without arsenic as the presence of As(III) appeared to cause non-linearity in some factor effects and thus impacted the conductivity in more complex ways than previously detailed in literature. In all models the combined effect of factors was shown to be minor when compared to the effect of single factors. Conductivity was shown to increase when copper, nickel and arsenic concentrations were decreased and increase with increased temperature and acidity. Moreover, the arsenic concentration was shown to decrease the level of conductivity more than previously suggested in the literature.",
keywords = "Conductivity, Conductivity model, Copper electrorefining electrolyte",
author = "Taina Kalliom{\"a}ki and Jari Aromaa and Mari Lundstr{\"o}m",
year = "2016",
month = "9",
day = "1",
doi = "10.3390/min6030059",
language = "English",
volume = "6",
pages = "1--11",
journal = "Minerals",
issn = "2075-163X",
publisher = "Multidisciplinary Digital Publishing Institute (MDPI)",
number = "3",

}

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TY - JOUR

T1 - Modeling the effect of composition and temperature on the conductivity of synthetic copper electrorefining electrolyte

AU - Kalliomäki, Taina

AU - Aromaa, Jari

AU - Lundström, Mari

PY - 2016/9/1

Y1 - 2016/9/1

N2 - The physico-chemical properties of the copper electrolyte significantly affect the energy consumption of the electrorefining process and the quality of the cathode product. Favorable conditions for electrorefining processes are typically achieved by keeping both the electrolyte conductivity and diffusion coefficient of Cu(II) high, while ensuring low electrolyte viscosity. In this work the conductivity of the copper electrorefining electrolyte was investigated as a function of temperature (50–70 ˚C) and concentrations of copper (Cu(II), 40–60 g/L), nickel (Ni(II), 0–20 g/L), arsenic (As(III), 0–30 g/L) and sulfuric acid (160–220 g/L). In total 165 different combinations of these factors were studied. The results were treated using factorial analysis, and as a result, four electrolyte conductivity models were built up. Models were constructed both with and without arsenic as the presence of As(III) appeared to cause non-linearity in some factor effects and thus impacted the conductivity in more complex ways than previously detailed in literature. In all models the combined effect of factors was shown to be minor when compared to the effect of single factors. Conductivity was shown to increase when copper, nickel and arsenic concentrations were decreased and increase with increased temperature and acidity. Moreover, the arsenic concentration was shown to decrease the level of conductivity more than previously suggested in the literature.

AB - The physico-chemical properties of the copper electrolyte significantly affect the energy consumption of the electrorefining process and the quality of the cathode product. Favorable conditions for electrorefining processes are typically achieved by keeping both the electrolyte conductivity and diffusion coefficient of Cu(II) high, while ensuring low electrolyte viscosity. In this work the conductivity of the copper electrorefining electrolyte was investigated as a function of temperature (50–70 ˚C) and concentrations of copper (Cu(II), 40–60 g/L), nickel (Ni(II), 0–20 g/L), arsenic (As(III), 0–30 g/L) and sulfuric acid (160–220 g/L). In total 165 different combinations of these factors were studied. The results were treated using factorial analysis, and as a result, four electrolyte conductivity models were built up. Models were constructed both with and without arsenic as the presence of As(III) appeared to cause non-linearity in some factor effects and thus impacted the conductivity in more complex ways than previously detailed in literature. In all models the combined effect of factors was shown to be minor when compared to the effect of single factors. Conductivity was shown to increase when copper, nickel and arsenic concentrations were decreased and increase with increased temperature and acidity. Moreover, the arsenic concentration was shown to decrease the level of conductivity more than previously suggested in the literature.

KW - Conductivity

KW - Conductivity model

KW - Copper electrorefining electrolyte

UR - http://www.scopus.com/inward/record.url?scp=84977138092&partnerID=8YFLogxK

U2 - 10.3390/min6030059

DO - 10.3390/min6030059

M3 - Article

VL - 6

SP - 1

EP - 11

JO - Minerals

JF - Minerals

SN - 2075-163X

IS - 3

M1 - 59

ER -

ID: 6614489