Effect of typical impurities for the formation of floating slimes in copper electrorefining
| Autor: | Elisabeth Klindtworth, Shila Jafari, Jari Aromaa, Taina Kalliomäki, Mari Lundström, Arif T. Aji, Benjamin P. Wilson, Mikko Kiviluoma |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
Antimony
Electrorefining 020209 energy Inorganic chemistry chemistry.chemical_element 02 engineering and technology Electrolyte Arsenic 020501 mining & metallurgy Bismuth law.invention Geochemistry and Petrology Impurity law 0202 electrical engineering electronic engineering information engineering ta215 Floating slime Filtration Chemistry Metallurgy Geotechnical Engineering and Engineering Geology Copper 0205 materials engineering Electrowinning |
| Zdroj: | Jafari, S, Kiviluoma, M, Kalliomäki, T, Klindtworth, E, Aji, A T, Aromaa, J, Wilson, B P & Lundström, M 2017, ' Effect of typical impurities for the formation of floating slimes in copper electrorefining ', International Journal of Mineral Processing, vol. 168, pp. 109-115 . https://doi.org/10.1016/j.minpro.2017.09.016 |
| ISSN: | 0301-7516 |
| Popis: | In electrorefining, Group 15 impurities arsenic, antimony and bismuth, may precipitate within the bulk electrolyte as floating slimes and contaminate the copper cathodes. In order to determine the impurity specific thresholds related to the formation of suspended solids, synthetic copper electrorefining electrolytes with different concentrations of arsenic, antimony and bismuth were investigated by a continuous filtration method. The amount and composition of the floating slimes obtained were evaluated in terms of the initial impurity concentrations present in the synthetic electrolyte. As a result, the specific influence of arsenic, antimony and bismuth on the floating slime formation was ascertained. The results suggest that there is an upper limit in electrorefining electrolytes for antimony (Sb) of 800 mg/L for floating slime formation, although the limit for Bi was less clear. Furthermore, the structure of the synthetic floating precipitates produced were analyzed using both SEM-EDS and XRD and showed typical amorphous structure of floating slimes with particle size of approximately 25 μm and predicted composition of BiAsO4, SbAsO4, Sb2O3 and Bi2O3. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect