Thermochemical Route for Extraction and Recycling of Critical, Strategic and High Value Elements from By-Products and End-of-Life Materials, Part I: Treatment of a Copper By-Product in Air Atmosphere - Université de Lorraine Access content directly
Journal Articles Materials Year : 2019

Thermochemical Route for Extraction and Recycling of Critical, Strategic and High Value Elements from By-Products and End-of-Life Materials, Part I: Treatment of a Copper By-Product in Air Atmosphere

Ndue Kanari
  • Function : Author
  • PersonId : 1000077
Eric Allain
  • Function : Author
  • PersonId : 780814
  • IdRef : 192204300
Seit Shallari
  • Function : Author
Frédéric Diot
  • Function : Author
Sebastien Diliberto
Fabrice Patisson
Jacques Yvon
  • Function : Author

Abstract

Development of our modern society requests a number of critical and strategic elements (platinum group metals, In, Ga, Ge. . .) and high value added elements (Au, Ag, Se, Te, Ni. . .) which are often concentrated in by-products during the extraction of base metals (Cu, Pb, Zn. . .). Further, recycling of end-of-life materials employed in high technology, renewable energy and transport by conventional extractive processes also leads to the concentration of such chemical elements and their compounds in metallurgical by-products and/or co-products. One of these materials, copper anode slime (CAS), derived from a copper electrolytic refining factory, was used for this study. The sample was subjected to isothermal treatment from 225 to 770 • C under air atmosphere and the reaction products were systematically analyzed by scanning electron microscopy through energy dispersive spectroscopy (SEM-EDS) and X-ray diffraction (XRD) to investigate the thermal behavior of the treated sample. The main components of the anode slime (CuAgSe, Cu 2-x Se y S 1-y , Ag 3 AuSe 2) react with oxygen, producing mostly copper and selenium oxides as well as Ag-Au alloys as final products at temperatures higher than 500 • C. Selenium dioxide (SeO 2) is volatilized and recovered in pure state by cooling the gaseous phase, whilst copper(II) oxide, silver, gold and tellurium remain in the treatment residue.
Fichier principal
Vignette du fichier
materials-12-01625.pdf (6.72 Mo) Télécharger le fichier
Origin : Files produced by the author(s)
Loading...

Dates and versions

hal-02167649 , version 1 (28-06-2019)

Identifiers

Cite

Ndue Kanari, Eric Allain, Seit Shallari, Frédéric Diot, Sebastien Diliberto, et al.. Thermochemical Route for Extraction and Recycling of Critical, Strategic and High Value Elements from By-Products and End-of-Life Materials, Part I: Treatment of a Copper By-Product in Air Atmosphere. Materials, 2019, 12 (10), pp.1625. ⟨10.3390/ma12101625⟩. ⟨hal-02167649⟩
72 View
99 Download

Altmetric

Share

Gmail Facebook X LinkedIn More