LAPSE:2023.20481
Published Article
LAPSE:2023.20481
Application of Spent Coffee Grounds (SCGs) as a Fuel and Alternative Reducer of Slags from the Copper Industry
March 20, 2023
Abstract
This article presents the results of a study on metallurgical slag reduction using biomass such as Spent Coffee Grounds (SCGs). The proposed solution is a new aspect of searching for alternatives to standard reducers used in pyrometallurgical processes of metal production. Its gasification yields significant amounts of hydrocarbons, which are excellent reducing agents in such processes. The research results of copper slag reduction with the use of SCG biomass indicate this process is characterised by lower carbon dioxide emissions compared with the process using solid fuels such as coke and coke breeze. The addition of SCG as the reducer ensures the decrease in copper content in the slag to 0.32 wt.%, which corresponds to the increase of so-called relative decopperisation degree even up to 96.9%. As the decopperisation degree of slag increases, significantly more intense reduction in lead oxides during the reduction process is observed. The smallest lead content in waste slag of 0.91 wt.% was obtained for the slag reduction process with 7.56 wt.% of SCG as the reducer and the process duration of 1.5 h.
This article presents the results of a study on metallurgical slag reduction using biomass such as Spent Coffee Grounds (SCGs). The proposed solution is a new aspect of searching for alternatives to standard reducers used in pyrometallurgical processes of metal production. Its gasification yields significant amounts of hydrocarbons, which are excellent reducing agents in such processes. The research results of copper slag reduction with the use of SCG biomass indicate this process is characterised by lower carbon dioxide emissions compared with the process using solid fuels such as coke and coke breeze. The addition of SCG as the reducer ensures the decrease in copper content in the slag to 0.32 wt.%, which corresponds to the increase of so-called relative decopperisation degree even up to 96.9%. As the decopperisation degree of slag increases, significantly more intense reduction in lead oxides during the reduction process is observed. The smallest lead content in waste slag of 0.91 wt.% was obtained for the slag reduction process with 7.56 wt.% of SCG as the reducer and the process duration of 1.5 h.
Record ID
Keywords
metallurgical slag, reduction, spent coffee grounds
Subject
Suggested Citation
Matula T, Labaj J, Nowacki K, Blacha L, Kortyka L, Mycka L, Madej P, Jaworek L, Wojtal T. Application of Spent Coffee Grounds (SCGs) as a Fuel and Alternative Reducer of Slags from the Copper Industry. (2023). LAPSE:2023.20481
Author Affiliations
Matula T: Department of Metallurgy and Recycling, Faculty of Materials Science, Silesian University of Technology, Krasinskiego 8, 40-019 Katowice, Poland [ORCID]
Labaj J: Department of Production Engineering, Faculty of Materials Science, Silesian University of Technology, Krasinskiego 8, 40-019 Katowice, Poland [ORCID]
Nowacki K: Department of Production Engineering, Faculty of Materials Science, Silesian University of Technology, Krasinskiego 8, 40-019 Katowice, Poland [ORCID]
Blacha L: Department of Metallurgy and Recycling, Faculty of Materials Science, Silesian University of Technology, Krasinskiego 8, 40-019 Katowice, Poland [ORCID]
Kortyka L: Lukasiewicz Research Network—Institute of Non-Ferrous Metals, Sowinskiego 5, 44-100 Gliwice, Poland [ORCID]
Mycka L: Lukasiewicz Research Network—Institute of Non-Ferrous Metals, Sowinskiego 5, 44-100 Gliwice, Poland
Madej P: Lukasiewicz Research Network—Institute of Non-Ferrous Metals, Sowinskiego 5, 44-100 Gliwice, Poland [ORCID]
Jaworek L: Lukasiewicz Research Network—Institute of Non-Ferrous Metals, Sowinskiego 5, 44-100 Gliwice, Poland
Wojtal T: Department of Metallurgy and Recycling, Faculty of Materials Science, Silesian University of Technology, Krasinskiego 8, 40-019 Katowice, Poland
Labaj J: Department of Production Engineering, Faculty of Materials Science, Silesian University of Technology, Krasinskiego 8, 40-019 Katowice, Poland [ORCID]
Nowacki K: Department of Production Engineering, Faculty of Materials Science, Silesian University of Technology, Krasinskiego 8, 40-019 Katowice, Poland [ORCID]
Blacha L: Department of Metallurgy and Recycling, Faculty of Materials Science, Silesian University of Technology, Krasinskiego 8, 40-019 Katowice, Poland [ORCID]
Kortyka L: Lukasiewicz Research Network—Institute of Non-Ferrous Metals, Sowinskiego 5, 44-100 Gliwice, Poland [ORCID]
Mycka L: Lukasiewicz Research Network—Institute of Non-Ferrous Metals, Sowinskiego 5, 44-100 Gliwice, Poland
Madej P: Lukasiewicz Research Network—Institute of Non-Ferrous Metals, Sowinskiego 5, 44-100 Gliwice, Poland [ORCID]
Jaworek L: Lukasiewicz Research Network—Institute of Non-Ferrous Metals, Sowinskiego 5, 44-100 Gliwice, Poland
Wojtal T: Department of Metallurgy and Recycling, Faculty of Materials Science, Silesian University of Technology, Krasinskiego 8, 40-019 Katowice, Poland
Journal Name
Energies
Volume
16
Issue
5
First Page
2415
Year
2023
Publication Date
2023-03-02
ISSN
1996-1073
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PII: en16052415, Publication Type: Journal Article
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LAPSE:2023.20481
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https://doi.org/10.3390/en16052415
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Mar 20, 2023
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