Modeling the Effect of Composition and Temperature on the Conductivity of Synthetic Copper Electrorefining Electrolyte
| Autor: | Jari Aromaa, Taina Kalliomäki, Mari Lundström |
|---|---|
| Přispěvatelé: | Department of Materials Science and Engineering, Department of Chemical and Metallurgical Engineering, Aalto-yliopisto, Aalto University |
| Rok vydání: | 2016 |
| Předmět: |
Conductivity
Diffusion Inorganic chemistry chemistry.chemical_element Geology Sulfuric acid 02 engineering and technology Electrolyte 010501 environmental sciences Geotechnical Engineering and Engineering Geology 01 natural sciences Copper 020501 mining & metallurgy Copper electrorefining electrolyte chemistry.chemical_compound Nickel Conductivity model 0205 materials engineering chemistry copper electrorefining electrolyte conductivity conductivity model ta216 Arsenic 0105 earth and related environmental sciences Electrowinning |
| Zdroj: | Minerals; Volume 6; Issue 3; Pages: 59 |
| ISSN: | 2075-163X |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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