Thermal Decomposition Kinetics of Rare Earth Minerals in Tailings with Addition of MgO
Due to the advantage in deactivating fluorine and enhancing the decomposition of rare earth (RE) minerals, MgO was applied to the magnetizing roasting of Bayan Obo tailings in this work. The effects of MgO dosages, roasting temperature, and holding time on the decomposition rate of RE minerals were...
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MDPI AG
2021-04-01
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| Series: | Metals |
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| Online Access: | https://www.mdpi.com/2075-4701/11/5/701 |
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| author | Yan Zhou Shizhe Song Jianxing Liu Gongjin Cheng He Yang Xiangxin Xue |
| author_facet | Yan Zhou Shizhe Song Jianxing Liu Gongjin Cheng He Yang Xiangxin Xue |
| author_sort | Yan Zhou |
| collection | DOAJ |
| description | Due to the advantage in deactivating fluorine and enhancing the decomposition of rare earth (RE) minerals, MgO was applied to the magnetizing roasting of Bayan Obo tailings in this work. The effects of MgO dosages, roasting temperature, and holding time on the decomposition rate of RE minerals were experimentally studied. With a MgO dosage of 10 wt.%, the decomposition rate of RE minerals reached 98.09% at 750 °C. The phase composition of roasted samples was characterized by XRD and SEM-EDS. The incomplete decomposition rate was investigated with the observation of leaching residual by SEM-EDS. The decomposition kinetics of the RE minerals with the addition of MgO was analyzed with the Ginstling-Brundshtein model, where the reaction rate was controlled by chemical reaction. |
| first_indexed | 2024-03-10T11:59:19Z |
| format | Article |
| id | doaj.art-d26259ff8f8f4d6f905931929b3b50b4 |
| institution | Directory Open Access Journal |
| issn | 2075-4701 |
| language | English |
| last_indexed | 2024-03-10T11:59:19Z |
| publishDate | 2021-04-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Metals |
| spelling | doaj.art-d26259ff8f8f4d6f905931929b3b50b42023-11-21T17:04:00ZengMDPI AGMetals2075-47012021-04-0111570110.3390/met11050701Thermal Decomposition Kinetics of Rare Earth Minerals in Tailings with Addition of MgOYan Zhou0Shizhe Song1Jianxing Liu2Gongjin Cheng3He Yang4Xiangxin Xue5School of Metallurgy, Northeastern University, Shenyang 110169, ChinaSchool of Metallurgy, Northeastern University, Shenyang 110169, ChinaSchool of Metallurgy, Northeastern University, Shenyang 110169, ChinaSchool of Metallurgy, Northeastern University, Shenyang 110169, ChinaSchool of Metallurgy, Northeastern University, Shenyang 110169, ChinaSchool of Metallurgy, Northeastern University, Shenyang 110169, ChinaDue to the advantage in deactivating fluorine and enhancing the decomposition of rare earth (RE) minerals, MgO was applied to the magnetizing roasting of Bayan Obo tailings in this work. The effects of MgO dosages, roasting temperature, and holding time on the decomposition rate of RE minerals were experimentally studied. With a MgO dosage of 10 wt.%, the decomposition rate of RE minerals reached 98.09% at 750 °C. The phase composition of roasted samples was characterized by XRD and SEM-EDS. The incomplete decomposition rate was investigated with the observation of leaching residual by SEM-EDS. The decomposition kinetics of the RE minerals with the addition of MgO was analyzed with the Ginstling-Brundshtein model, where the reaction rate was controlled by chemical reaction.https://www.mdpi.com/2075-4701/11/5/701kineticsrare earthMgO roastingBayan Obo tailingsthermal decompositionmagnetizing roasting |
| spellingShingle | Yan Zhou Shizhe Song Jianxing Liu Gongjin Cheng He Yang Xiangxin Xue Thermal Decomposition Kinetics of Rare Earth Minerals in Tailings with Addition of MgO Metals kinetics rare earth MgO roasting Bayan Obo tailings thermal decomposition magnetizing roasting |
| title | Thermal Decomposition Kinetics of Rare Earth Minerals in Tailings with Addition of MgO |
| title_full | Thermal Decomposition Kinetics of Rare Earth Minerals in Tailings with Addition of MgO |
| title_fullStr | Thermal Decomposition Kinetics of Rare Earth Minerals in Tailings with Addition of MgO |
| title_full_unstemmed | Thermal Decomposition Kinetics of Rare Earth Minerals in Tailings with Addition of MgO |
| title_short | Thermal Decomposition Kinetics of Rare Earth Minerals in Tailings with Addition of MgO |
| title_sort | thermal decomposition kinetics of rare earth minerals in tailings with addition of mgo |
| topic | kinetics rare earth MgO roasting Bayan Obo tailings thermal decomposition magnetizing roasting |
| url | https://www.mdpi.com/2075-4701/11/5/701 |
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