Dissolution of copper and selenium from copper anode slimes

Yasin Kilic*, Servet Timur

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

2 Citations (Scopus)

Abstract

In this study, the recovery process of copper and selenium from copper anode slimes, supplied from Sarkuysan Co. in Turkey, has been investigated by employing hydrometallurgical methods under different conditions and parameters. The applied process is composed of three major stages: Characterization of anode slime, decopperization in H2SO4 medium, dissolving selenium in NaOH solution from decopperized anode slimes. The phase composition and chemical analysis of anode slime were determined with X-ray diffraction (XRD) and atomic absorption spectrometry (AAS) methods, respectively. After characterization step, the decopperization of anode slime was performed by utilizing the dissolution technique in H2SO4 medium. The effects of oxygen flow rate and process temperature on the stage of decop-perization were studied. 93.8 % Cu recovery was achieved at a reaction temperature of 80 °C, a flow rate of 2 L/min. oxygen, a stirring speed of 800 rpm, a solid-to-liquid ratio of 1:5, the concentration of 2 M H 2SO4 and the reaction duration of 2 hours. Cu 2Se was detected with the X-ray diffraction technique as a remaining phase of copper in the anode slime after decopperization process. Subsequently, decopperized anode slimes were treated by NaOH solution in order to dissolve selenium. The influences of NaOH concentration, reaction temperature and amounts of KMnO4 additions on the dissolution of selenium were examined. The maximum recovery of 86.8 % selenium was accomplished in 4 M NaOH solution, at reaction temperature of 90 °C, the flow rate of 2 L/min oxygen, a stirring speed of 800 rpm, a solid-to-liquid ratio of 1:10 and in 3 hours of treatment.

Original languageEnglish
Title of host publicationProceedings - European Metallurgical Conference, EMC 2011
Pages57-70
Number of pages14
Publication statusPublished - 2011
EventEuropean Metallurgical Conference, EMC 2011 - Dusseldorf, Germany
Duration: 26 Jun 201129 Jun 2011

Publication series

NameProceedings - European Metallurgical Conference, EMC 2011
Volume1

Conference

ConferenceEuropean Metallurgical Conference, EMC 2011
Country/TerritoryGermany
CityDusseldorf
Period26/06/1129/06/11

Keywords

  • Anode slime
  • Recovery
  • Selenium

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