Equilibria of gold and silver between molten copper and FeOx-SiO2-Al2O3 slag in WEEE smelting at 1300 °C

Katri Avarmaa, Hugh O’Brien, Pekka Taskinen

Tutkimustuotos: Artikkeli kirjassa/konferenssijulkaisussaConference article in proceedingsScientificvertaisarvioitu

20 Sitaatiot (Scopus)

Abstrakti

Waste Electrical and Electronic Equipment (WEEE) offers a significant resource for precious metals such as gold and silver. To maximize precious metal recoveries and sustainable use their behavior during WEEE smelting with copper as the collector metal needs to be characterized. This study experimentally determines the distributions of gold and silver between metallic copper and FeOx-SiO2-Al2O3slag (LCu/s[Me] = [Me]Copper/[Me]Slag) in alumina-saturation over the oxygen potential range of 10-5–10-10atm at 1300 °C. The experiments were conducted employing equilibration / quenching followed by major element analysis by Electron Probe Micro-Analysis (EPMA) and trace element analysis by Laser Ablation Inductively Coupled Mass Spectrometry (LA-ICP-MS) techniques. Our results show silver distribution increased exponentially from 30 to 1000 as a function of decreasing oxygen partial pressure. Gold distribution was 105at pO2= 10-5atm and >106at pO2= 10-6–10-10atm.

AlkuperäiskieliEnglanti
OtsikkoAdvances in Molten Slags, Fluxes, and Salts: Proceedings of the 10th International Conference on Molten Slags, Fluxes and Salts 2016
KustantajaSpringer
Sivut193-202
Sivumäärä10
ISBN (painettu)9783319486253
DOI - pysyväislinkit
TilaJulkaistu - 2016
OKM-julkaisutyyppiA4 Artikkeli konferenssijulkaisussa
TapahtumaINTERNATIONAL CONFERENCE ON MOLTEN SLAGS, FLUXES AND SALTS - Seattle Grand Hyatt, Seattle, Yhdysvallat
Kesto: 22 toukok. 201625 toukok. 2016
Konferenssinumero: 10

Conference

ConferenceINTERNATIONAL CONFERENCE ON MOLTEN SLAGS, FLUXES AND SALTS
LyhennettäMOLTEN
Maa/AlueYhdysvallat
KaupunkiSeattle
Ajanjakso22/05/201625/05/2016

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