Migration of fluorine during the reduction of copper slag from spent cathode carbon produces copper-iron alloys
Spent cathode carbon (SCC) is a hazardous solid waste discharged from the aluminium electrolysis industry that poses a serious environmental pollution risk. In this paper, the migration transformation route and distribution ratio of fluorine during the reduction of copper slag by SCC were investigat...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2023-03-01
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| Series: | Journal of Materials Research and Technology |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2238785423001473 |
| _version_ | 1797858836135018496 |
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| author | Mingyang Li Shiwei Zhou Bo Li Yonggang Wei Hua Wang |
| author_facet | Mingyang Li Shiwei Zhou Bo Li Yonggang Wei Hua Wang |
| author_sort | Mingyang Li |
| collection | DOAJ |
| description | Spent cathode carbon (SCC) is a hazardous solid waste discharged from the aluminium electrolysis industry that poses a serious environmental pollution risk. In this paper, the migration transformation route and distribution ratio of fluorine during the reduction of copper slag by SCC were investigated. The results show that fluorine accounts for 57.92% of the slag phase, and the main phase is CaF2, which accounts for 41.75% of the gas phase and 0.33% of the alloy phase when reduced at 1460 °C with 10 wt% SCC for 90 min. The recoveries of reduced Cu and Fe reached 94.42% and 40.32%, respectively. After reduction by metallization, the F− leaching toxicity in the leaching slag was 38 mg/L, which is far below the regulatory limit (100 mg/L). In the process of copper slag reduction by SCC metallization, the copper and iron in the slag were effectively recovered, thus realizing the resourceful and harmless utilization of SCC. This achieves the goal of “treating waste with waste” and significantly reduces the treatment cost of SCC. |
| first_indexed | 2024-04-09T21:19:48Z |
| format | Article |
| id | doaj.art-b7080fa2764047d4aed94c3a1c7d0cc2 |
| institution | Directory Open Access Journal |
| issn | 2238-7854 |
| language | English |
| last_indexed | 2024-04-09T21:19:48Z |
| publishDate | 2023-03-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of Materials Research and Technology |
| spelling | doaj.art-b7080fa2764047d4aed94c3a1c7d0cc22023-03-28T06:46:22ZengElsevierJournal of Materials Research and Technology2238-78542023-03-012318211833Migration of fluorine during the reduction of copper slag from spent cathode carbon produces copper-iron alloysMingyang Li0Shiwei Zhou1Bo Li2Yonggang Wei3Hua Wang4State Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization, Kunming University of Science and Technology, Kunming 650093, China; Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology, Kunming 650093, ChinaState Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization, Kunming University of Science and Technology, Kunming 650093, China; Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology, Kunming 650093, China; Corresponding author. State Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization, Kunming University of Science and Technology, Kunming 650093, China.State Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization, Kunming University of Science and Technology, Kunming 650093, China; Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology, Kunming 650093, ChinaState Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization, Kunming University of Science and Technology, Kunming 650093, China; Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology, Kunming 650093, ChinaState Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization, Kunming University of Science and Technology, Kunming 650093, China; Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology, Kunming 650093, ChinaSpent cathode carbon (SCC) is a hazardous solid waste discharged from the aluminium electrolysis industry that poses a serious environmental pollution risk. In this paper, the migration transformation route and distribution ratio of fluorine during the reduction of copper slag by SCC were investigated. The results show that fluorine accounts for 57.92% of the slag phase, and the main phase is CaF2, which accounts for 41.75% of the gas phase and 0.33% of the alloy phase when reduced at 1460 °C with 10 wt% SCC for 90 min. The recoveries of reduced Cu and Fe reached 94.42% and 40.32%, respectively. After reduction by metallization, the F− leaching toxicity in the leaching slag was 38 mg/L, which is far below the regulatory limit (100 mg/L). In the process of copper slag reduction by SCC metallization, the copper and iron in the slag were effectively recovered, thus realizing the resourceful and harmless utilization of SCC. This achieves the goal of “treating waste with waste” and significantly reduces the treatment cost of SCC.http://www.sciencedirect.com/science/article/pii/S2238785423001473Spent cathode carbonCopper slagFluorineMigration and transformationMetallization reduction |
| spellingShingle | Mingyang Li Shiwei Zhou Bo Li Yonggang Wei Hua Wang Migration of fluorine during the reduction of copper slag from spent cathode carbon produces copper-iron alloys Journal of Materials Research and Technology Spent cathode carbon Copper slag Fluorine Migration and transformation Metallization reduction |
| title | Migration of fluorine during the reduction of copper slag from spent cathode carbon produces copper-iron alloys |
| title_full | Migration of fluorine during the reduction of copper slag from spent cathode carbon produces copper-iron alloys |
| title_fullStr | Migration of fluorine during the reduction of copper slag from spent cathode carbon produces copper-iron alloys |
| title_full_unstemmed | Migration of fluorine during the reduction of copper slag from spent cathode carbon produces copper-iron alloys |
| title_short | Migration of fluorine during the reduction of copper slag from spent cathode carbon produces copper-iron alloys |
| title_sort | migration of fluorine during the reduction of copper slag from spent cathode carbon produces copper iron alloys |
| topic | Spent cathode carbon Copper slag Fluorine Migration and transformation Metallization reduction |
| url | http://www.sciencedirect.com/science/article/pii/S2238785423001473 |
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