| Existing State and Partitioning of Rare Earth on Weathered Ores |
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| 作者姓名： | 池汝安 田君 李中军 彭翠 吴元欣 李世荣 王存文 周志昂 |
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| 作者单位： | [1]Wuhan Institute of Chemical Technology, Hubei Key Laboratory of Novel Chemical Reactor and Green Chemical Technology, Wuhan 430074, China [2]Institute of Applied Chemistry, Jiangxi Academy of Science, Nanchang 330029, China [3]Mineable Oil Sands, Alberta Research Council, Edmonton, Canada, T6N 1E4 |
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| 基金项目： | Project supported by the National Natural Science Foundation of China （50474022） |
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| 摘 要： | The existing state and partitioning of rare earth （RE） on weathered ores in Longnan County（LN）, Xingfeng County（XF） and Ninghua County（NH） were characterized systematically by standard geological analytical methods. It is found that RE in the weathered rare earth ores exist as four phases： （a） water soluble, （b） ion-exchangeable, （c） colloidal sediment （oxides）, （d） minerals, in which mainly as ion exchangeable phase, accounting for nearly 80% of total RE, with about 20% in the form of colloid sediment phase and mineral phase, but very little as aqueous soluble phase. These rare earth partitioning were mainly chosen mid-heavy RE elements, occupying above 60%, but not equal in the four phases. The mid-heavy RE elements were primarily enriched in the ion exchangeable phase up to 40%, while the containment of cerium dioxide is below 2 %. The cerium deficiency occurs in the ion exchangeable phase in weathered ore. It results from that the Ce^3＋ is oxidized into Ce^4＋ and changes into CeO2. For LN ore, the containment of Y is high in weathered ore because Y-minerals are abundant in original rock.
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| 关 键 词： | 稀土 风化 矿石 划分 |
| 文章编号： | 1002-0721（2005）06-0756-04 |
| 收稿时间： | 2005-04-12 |
| 修稿时间： | 2005-07-11 |
Existing State and Partitioning of Rare Earth on Weathered Ores |
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| Chi Ruan,Tian Jun,Li Zhongjun,Peng Cui,Wu Yuanxin,Li Shirong,Wang Cunwen,Zhou Zhiang.Existing State and Partitioning of Rare Earth on Weathered Ores[J].Journal of Rare Earths,2005,23(6):756-759. |
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| Authors: | Chi Ruan Tian Jun Li Zhongjun Peng Cui Wu Yuanxin Li Shirong Wang Cunwen Zhou Zhiang |
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| Abstract: | The existing state and partitioning of rare earth (RE) on weathered ores in Longnan County(LN), Xingfeng County(XF) and Ninghua County(NH) were characterized systematically by standard geological analytical methods. It is found that RE in the weathered rare earth ores exist as four phases: (a) water soluble, (b) ion-exchangeable, (c) colloidal sediment (oxides), (d) minerals, in which mainly as ion exchangeable phase, accounting for nearly 80% of total RE, with about 20% in the form of colloid sediment phase and mineral phase, but very little as aqueous soluble phase. These rare earth partitioning were mainly chosen mid-heavy RE elements, occupying above 60%, but not equal in the four phases. The mid-heavy RE elements were primarily enriched in the ion exchangeable phase up to 40%, while the containment of cerium dioxide is below 2%. The cerium deficiency occurs in the ion exchangeable phase in weathered ore. It results from that the Ce 3+ is oxidized into Ce 4+ and changes into CeO_2. For LN ore, the containment of Y is high in weathered ore because Y-minerals are abundant in original rock. |
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| Keywords: | weathered existing state partitioning rare earths |
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