Production of high-purity Mg metal from dolomite through novel molten salt electrolysis and vacuum distillation
In this study, a novel Mg production process for producing high-purity Mg metal from dolomite was developed. When the electrolysis of calcined dolomite was conducted using Cu cathode and C anode in MgF2 – LiF molten salt at 1083–1173 K by applying an average current of 1.42–1.46 A for 9.50–21.0 h, t...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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KeAi Communications Co., Ltd.
2023-04-01
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| Series: | Journal of Magnesium and Alloys |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2213956722002626 |
| _version_ | 1797812783519105024 |
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| author | Hyeong-Jun Jeoung Tae-Hyuk Lee Jin-Young Lee Kyung-Woo Yi Jungshin Kang |
| author_facet | Hyeong-Jun Jeoung Tae-Hyuk Lee Jin-Young Lee Kyung-Woo Yi Jungshin Kang |
| author_sort | Hyeong-Jun Jeoung |
| collection | DOAJ |
| description | In this study, a novel Mg production process for producing high-purity Mg metal from dolomite was developed. When the electrolysis of calcined dolomite was conducted using Cu cathode and C anode in MgF2 – LiF molten salt at 1083–1173 K by applying an average current of 1.42–1.46 A for 9.50–21.0 h, the current efficiency of 66.4–88.6% was obtained. The produced Mg alloys consisted of MgCu2 and Cu (Mg) or MgCu2 and CuMg2 phases, depending on the Mg concentration in the Mg alloy. When the electrolysis of calcined dolomite was conducted in MgF2 – LiF – CaF2 molten salt at 1083 K, the current efficiency was 40.9–71.4%, owing to undesired reactions such as electroreduction of Ca2+ or/and CO32− ions. Meanwhile, the current efficiency increased from 40.9% to 63.2% by utilizing a Pt anode, because the occurrence of CO32− ions in the molten salt was prevented. After vacuum distillation of the obtained Mg alloys at 1300 K for 10 h, Mg metal with a purity of 99.9996–99.9998% was produced. Therefore, the feasibility of this novel process for the production of high-purity Mg metal from dolomite was demonstrated. |
| first_indexed | 2024-03-13T07:42:35Z |
| format | Article |
| id | doaj.art-35346a24abbe4cafab17702071c4f561 |
| institution | Directory Open Access Journal |
| issn | 2213-9567 |
| language | English |
| last_indexed | 2024-03-13T07:42:35Z |
| publishDate | 2023-04-01 |
| publisher | KeAi Communications Co., Ltd. |
| record_format | Article |
| series | Journal of Magnesium and Alloys |
| spelling | doaj.art-35346a24abbe4cafab17702071c4f5612023-06-03T04:22:05ZengKeAi Communications Co., Ltd.Journal of Magnesium and Alloys2213-95672023-04-0111413081320Production of high-purity Mg metal from dolomite through novel molten salt electrolysis and vacuum distillationHyeong-Jun Jeoung0Tae-Hyuk Lee1Jin-Young Lee2Kyung-Woo Yi3Jungshin Kang4Korea Institute of Geoscience and Mineral Resources, 124 Gwahak-ro Yuseong-gu, Daejeon 34132, Republic of Korea; Department of Materials Science and Engineering, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul 08826, Republic of KoreaKorea Institute of Geoscience and Mineral Resources, 124 Gwahak-ro Yuseong-gu, Daejeon 34132, Republic of KoreaKorea Institute of Geoscience and Mineral Resources, 124 Gwahak-ro Yuseong-gu, Daejeon 34132, Republic of Korea; Department of Resources Engineering, University of Science and Technology, 217 Gajeong-ro Yuseong-gu, Daejeon 34113, Republic of KoreaDepartment of Materials Science and Engineering, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul 08826, Republic of Korea; Corresponding author at: Department of Materials Science and Engineering, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul 08826, Republic of Korea.Korea Institute of Geoscience and Mineral Resources, 124 Gwahak-ro Yuseong-gu, Daejeon 34132, Republic of Korea; School of Materials Science and Engineering, Pusan National University, 2 Busandaehak-ro, Geumjeong-gu, Busan 46241, Republic of Korea; Corresponding author at: School of Materials Science and Engineering, Pusan National University, 2 Busandaehak-ro, Geumjeong-gu, Busan 46241, Republic of Korea.In this study, a novel Mg production process for producing high-purity Mg metal from dolomite was developed. When the electrolysis of calcined dolomite was conducted using Cu cathode and C anode in MgF2 – LiF molten salt at 1083–1173 K by applying an average current of 1.42–1.46 A for 9.50–21.0 h, the current efficiency of 66.4–88.6% was obtained. The produced Mg alloys consisted of MgCu2 and Cu (Mg) or MgCu2 and CuMg2 phases, depending on the Mg concentration in the Mg alloy. When the electrolysis of calcined dolomite was conducted in MgF2 – LiF – CaF2 molten salt at 1083 K, the current efficiency was 40.9–71.4%, owing to undesired reactions such as electroreduction of Ca2+ or/and CO32− ions. Meanwhile, the current efficiency increased from 40.9% to 63.2% by utilizing a Pt anode, because the occurrence of CO32− ions in the molten salt was prevented. After vacuum distillation of the obtained Mg alloys at 1300 K for 10 h, Mg metal with a purity of 99.9996–99.9998% was produced. Therefore, the feasibility of this novel process for the production of high-purity Mg metal from dolomite was demonstrated.http://www.sciencedirect.com/science/article/pii/S2213956722002626High-purity magnesiumDolomiteMagnesium oxideElectrolytic processCopper metal cathodeVacuum distillation |
| spellingShingle | Hyeong-Jun Jeoung Tae-Hyuk Lee Jin-Young Lee Kyung-Woo Yi Jungshin Kang Production of high-purity Mg metal from dolomite through novel molten salt electrolysis and vacuum distillation Journal of Magnesium and Alloys High-purity magnesium Dolomite Magnesium oxide Electrolytic process Copper metal cathode Vacuum distillation |
| title | Production of high-purity Mg metal from dolomite through novel molten salt electrolysis and vacuum distillation |
| title_full | Production of high-purity Mg metal from dolomite through novel molten salt electrolysis and vacuum distillation |
| title_fullStr | Production of high-purity Mg metal from dolomite through novel molten salt electrolysis and vacuum distillation |
| title_full_unstemmed | Production of high-purity Mg metal from dolomite through novel molten salt electrolysis and vacuum distillation |
| title_short | Production of high-purity Mg metal from dolomite through novel molten salt electrolysis and vacuum distillation |
| title_sort | production of high purity mg metal from dolomite through novel molten salt electrolysis and vacuum distillation |
| topic | High-purity magnesium Dolomite Magnesium oxide Electrolytic process Copper metal cathode Vacuum distillation |
| url | http://www.sciencedirect.com/science/article/pii/S2213956722002626 |
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