Projects per year
Abstract
Zinc electrowinning is an energy-intensive step of hydrometallurgical zinc production in which ohmic drop contributes the second highest overpotential in the process. As the ohmic drop is a result of electrolyte conductivity, three conductivity models (Aalto-I, Aalto-II and Aalto-III) were formulated in this study based on the synthetic industrial electrolyte conditions of Zn (50–70 g/dm3), H2SO4 (150–200 g/dm3), Mn (0–8 g/dm3), Mg (0–4 g/dm3), and temperature, T (30–40◦C). These studies indicate that electrolyte conductivity increases with temperature and H2SO4 concentration, whereas metal ions have negative effects on conductivity. In addition, the interaction effects of temperature and the concentrations of metal ions on solution conductivity were tested by comparing the performance of the linear model (Aalto-I) and interrelated models (Aalto-II and Aalto-III) to determine their significance in the electrowinning process. Statistical analysis shows that Aalto-I has the highest accuracy of all the models developed and investigated in this study. From the industrial validation, Aalto-I also demonstrates a high level of correlation in comparison to the other models presented in this study. Further comparison of model Aalto-I with the existing published models from previous studies shows that model Aalto-I substantially improves the accuracy of the zinc conductivity empirical model.
Original language | English |
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Article number | 1824 |
Number of pages | 12 |
Journal | Metals |
Volume | 11 |
Issue number | 11 |
DOIs | |
Publication status | Published - 13 Nov 2021 |
MoE publication type | A1 Journal article-refereed |
Keywords
- Conductivity model
- Energy consumption
- Industrial validation
- Zinc electrowinning
Fingerprint
Dive into the research topics of 'Modelling the effect of solution composition and temperature on the conductivity of zinc electrowinning electrolytes'. Together they form a unique fingerprint.Projects
- 3 Finished
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-: TOCANEM, Hydro
Lundström, M. (Principal investigator), Aji, A. (Project Member), Aromaa-Stubb, R. (Project Member), Palomäki, H. (Project Member), Alajoki, J. (Project Member), Wang, Z. (Project Member), Aromaa, J. (Project Member), Halli, P. (Project Member), Rinne, M. (Project Member), Sahlman, M. (Project Member), Makarava, I. (Project Member), Sibarani, D. (Project Member), Wilson, B. (Project Member), Song, Y. (Project Member) & Tran, H. (Project Member)
01/09/2020 → 31/12/2023
Project: Business Finland: Other research funding
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SYMMET (HYDRO)
Lundström, M. (Principal investigator), Aji, A. (Project Member), Liu, F. (Project Member) & Kalliomäki, T. (Project Member)
01/11/2018 → 31/10/2020
Project: Business Finland: Other research funding
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GoldTail: Towards Sustainable Gold Recovery from Tailings (GoldTail)
Lundström, M. (Principal investigator), Yliniemi, K. (Project Member), Halli, P. (Project Member), Karppinen, A. (Project Member), Revitzer, H. (Project Member), Wilson, B. (Project Member), Seisko, S. (Project Member), Sahlman, M. (Project Member) & Wang, Z. (Project Member)
01/10/2018 → 30/09/2021
Project: Academy of Finland: Other research funding
Equipment
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Raw Materials Research Infrastructure
Karppinen, M. (Manager)
School of Chemical EngineeringFacility/equipment: Facility