Behavior of Nickel as a Trace Element and Time-Dependent Formation of Spinels in WEEE Smelting

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Abstract

For better understanding and maximal value utilization of the WEEE smelting process, the behavior and distribution of different trace elements must be known. In this study, the behavior of nickel as a trace element was studied in an equilibrium system with metallic copper—spinel saturated iron silicate slag (with 3 wt-% K2O)—iron aluminous spinel—gas. The experiments were conducted in alumina crucibles at 1300 °C, in oxygen pressure range of 10−10–10−5 atm. A time series of 15–60 min experiments was also conducted for investigating the formation rate of the primary spinel phase in the system. The results show that the distribution coefficient of nickel between metallic copper and liquid slag changes from approximately 70 to 0.4 along the increasing oxygen pressure range. In addition, a significant part of the nickel deports into the spinel phase. The spinel formation was investigated based on composition analysis results and visual observations from SEM-images.

Details

Original languageEnglish
Title of host publicationExtraction 2018
Subtitle of host publicationProceedings of the First Global Conference on Extractive Metallurgy
Publication statusPublished - 2018
MoE publication typeA3 Part of a book or another research book
EventGlobal Conference on Extractive Metallurgy - Ottawa, Canada
Duration: 26 Aug 201829 Aug 2018
Conference number: 1
http://www.extractionmeeting.org/Extraction/Home/Extraction/Default.aspx?hkey=7b5c7a17-4f49-4312-a245-8178042aab43

Publication series

NameThe Minerals, Metals & Materials Series

Conference

ConferenceGlobal Conference on Extractive Metallurgy
CountryCanada
CityOttawa
Period26/08/201829/08/2018
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