Abstract
| Original language | English |
|---|---|
| Pages (from-to) | 109-115 |
| Number of pages | 7 |
| Journal | International Journal of Mineral Processing |
| Volume | 168 |
| DOIs | |
| Publication status | Published - 10 Nov 2017 |
| MoE publication type | A1 Journal article-refereed |
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Keywords
- Antimony
- Arsenic
- Bismuth
- Copper
- Electrorefining
- Floating slime
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Effect of typical impurities for the formation of floating slimes in copper electrorefining. / Jafari, Shila (Corresponding Author); Kiviluoma, Mikko; Kalliomäki, Taina; Klindtworth, Elisabeth; Aji, Arif Tirto; Aromaa, Jari; Wilson, Benjamin P.; Lundström, Mari.
In: International Journal of Mineral Processing, Vol. 168, 10.11.2017, p. 109-115.Research output: Contribution to journal › Article › Scientific › peer-review
TY - JOUR
T1 - Effect of typical impurities for the formation of floating slimes in copper electrorefining
AU - Jafari, Shila
AU - Kiviluoma, Mikko
AU - Kalliomäki, Taina
AU - Klindtworth, Elisabeth
AU - Aji, Arif Tirto
AU - Aromaa, Jari
AU - Wilson, Benjamin P.
AU - Lundström, Mari
PY - 2017/11/10
Y1 - 2017/11/10
N2 - 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, Sb2O3and Bi2O3.
AB - 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, Sb2O3and Bi2O3.
KW - Antimony
KW - Arsenic
KW - Bismuth
KW - Copper
KW - Electrorefining
KW - Floating slime
U2 - 10.1016/j.minpro.2017.09.016
DO - 10.1016/j.minpro.2017.09.016
M3 - Article
VL - 168
SP - 109
EP - 115
JO - International Journal of Mineral Processing
JF - International Journal of Mineral Processing
SN - 0301-7516
ER -