Immobilization of fluorides from spent carbon cathode in a copper smelting slag
The fluorides from spent carbon cathodes could be effectively solidified in a molten copper smelting slag (FeO-Fe3O4-SiO2- CaO-Al2O3) in forms of CaF2 and Ca4Si2F2O7. The results of thermodynamic analysis, chemical analysis, and XRD and EPMA analyses showed that the F solidification efficiency incre...
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University of Belgrade, Technical Faculty, Bor
2022-01-01
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| Series: | Journal of Mining and Metallurgy. Section B: Metallurgy |
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| Online Access: | http://www.doiserbia.nb.rs/img/doi/1450-5339/2022/1450-53392100054L.pdf |
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| author | Li L. Wu G.-D. Tian F.-G. |
| author_facet | Li L. Wu G.-D. Tian F.-G. |
| author_sort | Li L. |
| collection | DOAJ |
| description | The fluorides from spent carbon cathodes could be effectively solidified in a molten copper smelting slag (FeO-Fe3O4-SiO2- CaO-Al2O3) in forms of CaF2 and Ca4Si2F2O7. The results of thermodynamic analysis, chemical analysis, and XRD and EPMA analyses showed that the F solidification efficiency increased with the CaO amount and decreased with the addition of Al2O3 and SiO2. In addition, it was noteworthy that the F solidification efficiency decreased with an excessive CaO amount, which could be ascribed to the consumption of SiO2 through forming CaSiO3 and Ca3Si2O7. It restricted the solidification of the fluoride into Ca4Si2F2O7. Under the conditions of melting temperature of 1300°C, residence time of 60 min, and N2 flow rate of 40 ml/min, the optimum CaO and NaF amounts were found to be 20 wt.% and 6 wt.%, respectively, in which the F solidification efficiency in the copper smelting slag of FeO-Fe3O4-SiO2-CaO-Al2O3 obtained 98.35%. |
| format | Article |
| id | doaj-art-0fd5bb5d1d8f4ba0aee282f22d2cfe21 |
| institution | Kabale University |
| issn | 1450-5339 2217-7175 |
| language | English |
| publishDate | 2022-01-01 |
| publisher | University of Belgrade, Technical Faculty, Bor |
| record_format | Article |
| series | Journal of Mining and Metallurgy. Section B: Metallurgy |
| spelling | doaj-art-0fd5bb5d1d8f4ba0aee282f22d2cfe212025-02-02T00:42:49ZengUniversity of Belgrade, Technical Faculty, BorJournal of Mining and Metallurgy. Section B: Metallurgy1450-53392217-71752022-01-0158112913910.2298/JMMB210616054L1450-53392100054LImmobilization of fluorides from spent carbon cathode in a copper smelting slagLi L.0Wu G.-D.1Tian F.-G.2College of Environmental Science and Engineering, Donghua University, Shanghai, China + Shanghai Institute of Pollution Control and Ecological Security, Shanghai, ChinaFaculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology, Kunming, ChinaCollege of Environmental Science and Engineering, Donghua University, Shanghai, ChinaThe fluorides from spent carbon cathodes could be effectively solidified in a molten copper smelting slag (FeO-Fe3O4-SiO2- CaO-Al2O3) in forms of CaF2 and Ca4Si2F2O7. The results of thermodynamic analysis, chemical analysis, and XRD and EPMA analyses showed that the F solidification efficiency increased with the CaO amount and decreased with the addition of Al2O3 and SiO2. In addition, it was noteworthy that the F solidification efficiency decreased with an excessive CaO amount, which could be ascribed to the consumption of SiO2 through forming CaSiO3 and Ca3Si2O7. It restricted the solidification of the fluoride into Ca4Si2F2O7. Under the conditions of melting temperature of 1300°C, residence time of 60 min, and N2 flow rate of 40 ml/min, the optimum CaO and NaF amounts were found to be 20 wt.% and 6 wt.%, respectively, in which the F solidification efficiency in the copper smelting slag of FeO-Fe3O4-SiO2-CaO-Al2O3 obtained 98.35%.http://www.doiserbia.nb.rs/img/doi/1450-5339/2022/1450-53392100054L.pdfspent carbon cathodefluoridescopper smelting slagsslag system of feo-fe3o4-sio2-cao-al2o3immobilization |
| spellingShingle | Li L. Wu G.-D. Tian F.-G. Immobilization of fluorides from spent carbon cathode in a copper smelting slag Journal of Mining and Metallurgy. Section B: Metallurgy spent carbon cathode fluorides copper smelting slags slag system of feo-fe3o4-sio2-cao-al2o3 immobilization |
| title | Immobilization of fluorides from spent carbon cathode in a copper smelting slag |
| title_full | Immobilization of fluorides from spent carbon cathode in a copper smelting slag |
| title_fullStr | Immobilization of fluorides from spent carbon cathode in a copper smelting slag |
| title_full_unstemmed | Immobilization of fluorides from spent carbon cathode in a copper smelting slag |
| title_short | Immobilization of fluorides from spent carbon cathode in a copper smelting slag |
| title_sort | immobilization of fluorides from spent carbon cathode in a copper smelting slag |
| topic | spent carbon cathode fluorides copper smelting slags slag system of feo-fe3o4-sio2-cao-al2o3 immobilization |
| url | http://www.doiserbia.nb.rs/img/doi/1450-5339/2022/1450-53392100054L.pdf |
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