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Pyro-Refining of Mechanically Treated Waste Printed Circuit Boards in a DC Arc-Furnace

Authorized Users Only
2018
Authors
Kamberović, Željko
Ranitović, Milisav
Korać, Marija
Jovanović, Nikola
Tomović, Božidar
Gajić, Nataša
Article (Published version)
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Abstract
This paper presents the results of theoretical assessment and a preliminary experimental investigation of the modified pyrometallurgical processing of metallic granulate obtained after mechanical treatment of waste printed circuit boards (WPCBs). The studied two-step process included oxidation of metallic granulate followed by pyrometallurgical refining in a DC arc-furnace. In the investigated process, the oxygen bounded in metal oxides, obtained during the oxidation annealing of granulate, was used as a "solid" oxidizer for subsequent pyrometallurgical refining in a DC arc-furnace. According to the obtained results, the Cu content in the produced metallic phase (anodic copper) was 98.4% and is suitable for further electro-refining process. In addition, over 94% of Au was concentrated in metallic phase, suggesting that a high Au yield could be attained. However, owing to the distribution between slag phase and filter product, only 60% of Ag was collected in the metal phase. In-between ...metal and slag is the metal-oxide phase, containing Cu with metals impurities, such as Sn and Pb, which was obtained as well, and could be further treated using conventional processes for additional metal valorization. The investigated concept would allow substitution of the long-lasting oxygen blowing process and application of complicated pyrometallurgical reactors and create a feasible alternative for lower operating capacities.

Keywords:
WPCBs / Metallic granulate / Recycling / Pyrometallurgy / Oxidative refining
Source:
Journal of Sustainable Metallurgy, 2018, 4, 2, 251-259
Publisher:
  • Springer, New York
Funding / projects:
  • Innovative synergy of by-products, waste minimization and clean technologies in metallurgy (RS-34033)

DOI: 10.1007/s40831-018-0167-3

ISSN: 2199-3823

WoS: 000435065900010

Scopus: 2-s2.0-85064155264
[ Google Scholar ]
9
5
URI
http://TechnoRep.tmf.bg.ac.rs/handle/123456789/4018
Collections
  • Radovi istraživača / Researchers’ publications (TMF)
  • Radovi istraživača (Inovacioni centar) / Researchers’ publications (Innovation Centre)
Institution/Community
Tehnološko-metalurški fakultet
TY  - JOUR
AU  - Kamberović, Željko
AU  - Ranitović, Milisav
AU  - Korać, Marija
AU  - Jovanović, Nikola
AU  - Tomović, Božidar
AU  - Gajić, Nataša
PY  - 2018
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/4018
AB  - This paper presents the results of theoretical assessment and a preliminary experimental investigation of the modified pyrometallurgical processing of metallic granulate obtained after mechanical treatment of waste printed circuit boards (WPCBs). The studied two-step process included oxidation of metallic granulate followed by pyrometallurgical refining in a DC arc-furnace. In the investigated process, the oxygen bounded in metal oxides, obtained during the oxidation annealing of granulate, was used as a "solid" oxidizer for subsequent pyrometallurgical refining in a DC arc-furnace. According to the obtained results, the Cu content in the produced metallic phase (anodic copper) was 98.4% and is suitable for further electro-refining process. In addition, over 94% of Au was concentrated in metallic phase, suggesting that a high Au yield could be attained. However, owing to the distribution between slag phase and filter product, only 60% of Ag was collected in the metal phase. In-between metal and slag is the metal-oxide phase, containing Cu with metals impurities, such as Sn and Pb, which was obtained as well, and could be further treated using conventional processes for additional metal valorization. The investigated concept would allow substitution of the long-lasting oxygen blowing process and application of complicated pyrometallurgical reactors and create a feasible alternative for lower operating capacities.
PB  - Springer, New York
T2  - Journal of Sustainable Metallurgy
T1  - Pyro-Refining of Mechanically Treated Waste Printed Circuit Boards in a DC Arc-Furnace
EP  - 259
IS  - 2
SP  - 251
VL  - 4
DO  - 10.1007/s40831-018-0167-3
ER  - 
@article{
author = "Kamberović, Željko and Ranitović, Milisav and Korać, Marija and Jovanović, Nikola and Tomović, Božidar and Gajić, Nataša",
year = "2018",
abstract = "This paper presents the results of theoretical assessment and a preliminary experimental investigation of the modified pyrometallurgical processing of metallic granulate obtained after mechanical treatment of waste printed circuit boards (WPCBs). The studied two-step process included oxidation of metallic granulate followed by pyrometallurgical refining in a DC arc-furnace. In the investigated process, the oxygen bounded in metal oxides, obtained during the oxidation annealing of granulate, was used as a "solid" oxidizer for subsequent pyrometallurgical refining in a DC arc-furnace. According to the obtained results, the Cu content in the produced metallic phase (anodic copper) was 98.4% and is suitable for further electro-refining process. In addition, over 94% of Au was concentrated in metallic phase, suggesting that a high Au yield could be attained. However, owing to the distribution between slag phase and filter product, only 60% of Ag was collected in the metal phase. In-between metal and slag is the metal-oxide phase, containing Cu with metals impurities, such as Sn and Pb, which was obtained as well, and could be further treated using conventional processes for additional metal valorization. The investigated concept would allow substitution of the long-lasting oxygen blowing process and application of complicated pyrometallurgical reactors and create a feasible alternative for lower operating capacities.",
publisher = "Springer, New York",
journal = "Journal of Sustainable Metallurgy",
title = "Pyro-Refining of Mechanically Treated Waste Printed Circuit Boards in a DC Arc-Furnace",
pages = "259-251",
number = "2",
volume = "4",
doi = "10.1007/s40831-018-0167-3"
}
Kamberović, Ž., Ranitović, M., Korać, M., Jovanović, N., Tomović, B.,& Gajić, N.. (2018). Pyro-Refining of Mechanically Treated Waste Printed Circuit Boards in a DC Arc-Furnace. in Journal of Sustainable Metallurgy
Springer, New York., 4(2), 251-259.
https://doi.org/10.1007/s40831-018-0167-3
Kamberović Ž, Ranitović M, Korać M, Jovanović N, Tomović B, Gajić N. Pyro-Refining of Mechanically Treated Waste Printed Circuit Boards in a DC Arc-Furnace. in Journal of Sustainable Metallurgy. 2018;4(2):251-259.
doi:10.1007/s40831-018-0167-3 .
Kamberović, Željko, Ranitović, Milisav, Korać, Marija, Jovanović, Nikola, Tomović, Božidar, Gajić, Nataša, "Pyro-Refining of Mechanically Treated Waste Printed Circuit Boards in a DC Arc-Furnace" in Journal of Sustainable Metallurgy, 4, no. 2 (2018):251-259,
https://doi.org/10.1007/s40831-018-0167-3 . .

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