Effect of typical impurities for the formation of floating slimes in copper electrorefining

Shila Jafari (Corresponding Author), Mikko Kiviluoma, Taina Kalliomäki, Elisabeth Klindtworth, Arif Tirto Aji, Jari Aromaa, Benjamin P. Wilson, Mari Lundström

Research output: Contribution to journalArticleScientificpeer-review

1 Citation (Scopus)

Abstract

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.
Original languageEnglish
Pages (from-to)109-115
Number of pages7
JournalInternational Journal of Mineral Processing
Volume168
DOIs
Publication statusPublished - 10 Nov 2017
MoE publication typeA1 Journal article-refereed

Fingerprint

Antimony
antimony
electrolyte
Bismuth
Electrolytes
bismuth
Copper
Arsenic
Impurities
copper
arsenic
Precipitates
Chemical analysis
Energy dispersive spectroscopy
Cathodes
scanning electron microscopy
Particle size
X-ray diffraction
particle size
Scanning electron microscopy

Keywords

  • Antimony
  • Arsenic
  • Bismuth
  • Copper
  • Electrorefining
  • Floating slime

Cite this

Jafari, S., Kiviluoma, M., Kalliomäki, T., Klindtworth, E., Aji, A. T., Aromaa, J., ... Lundström, M. (2017). Effect of typical impurities for the formation of floating slimes in copper electrorefining. International Journal of Mineral Processing, 168, 109-115. https://doi.org/10.1016/j.minpro.2017.09.016
Jafari, Shila ; Kiviluoma, Mikko ; Kalliomäki, Taina ; Klindtworth, Elisabeth ; Aji, Arif Tirto ; Aromaa, Jari ; Wilson, Benjamin P. ; Lundström, Mari. / Effect of typical impurities for the formation of floating slimes in copper electrorefining. In: International Journal of Mineral Processing. 2017 ; Vol. 168. pp. 109-115.
@article{4e587c889b4b44929e6d3ca70be3f6e2,
title = "Effect of typical impurities for the formation of floating slimes in copper electrorefining",
abstract = "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.",
keywords = "Antimony, Arsenic, Bismuth, Copper, Electrorefining, Floating slime",
author = "Shila Jafari and Mikko Kiviluoma and Taina Kalliom{\"a}ki and Elisabeth Klindtworth and Aji, {Arif Tirto} and Jari Aromaa and Wilson, {Benjamin P.} and Mari Lundstr{\"o}m",
year = "2017",
month = "11",
day = "10",
doi = "10.1016/j.minpro.2017.09.016",
language = "English",
volume = "168",
pages = "109--115",
journal = "International Journal of Mineral Processing",
issn = "0301-7516",
publisher = "Elsevier",

}

Jafari, S, Kiviluoma, M, Kalliomäki, T, Klindtworth, E, Aji, AT, Aromaa, J, Wilson, BP & 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

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 journalArticleScientificpeer-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 -