in situ leach mining of ion absorbed rare earth mineral
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in situ leach mining of ion absorbed rare earth mineral

China's ion-adsorption rare earth resources, mining ...

Oct 01, 2013  In-situ leach mining of ion-absorbed rare-earth mineral and some problems in application and dissemination Journal of the Southern Institute of Metallurgy (in Chinese) ,

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China's ion-adsorption rare earth resources, mining ...

leaching to tackle environmental problems associated with rare earth mining and extraction remains highly contentious (Zhao, 2000; Li and Shao, 2001; Liu, 2002; Li et al., 2010). The alternative technique of in-situ leaching for ion-adsorption rare earth minerals was developed in the mid-1980s and the first plant began operating in 1997.

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of Rare Earth in Laboratory Leaching Tests

Oct 07, 2020  is the only method for extraction of rare earth elements from the ion-adsorption type rare earth deposit [3,4]. At present, in situ leaching is the main mining method for this type of rare earth deposit for its great advantages in terms of mining costs and environmental protection [5]. However, there is a low recovery yield of rare earth and ...

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A Short Review on REE Recovery from Ion-Adsorption Clays

12. Mariano A (2012) Rare earth mining and exploration in North America. Elements 8(5): 369-376. 13. Wu C, Yuan Z, Bai G (1996) Rare earth deposits in China, Rare Earth Miner. Chem Orig. 14. Jun T, Jingqun Y, Ruan C, Guohua R, Mintao J (2010) Kinetics on leaching rare earth from the weathered crust elution-deposited rare earth ores

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Minerals Special Issue : Leaching of Rare Earth Elements ...

Nov 27, 2020  We suggest that by disregarding other control factors, rare earth recovery of over 90% can be achieved through leach mining with solutions of 8 wt% and a pH of 5 at a leaching rate of 5 mL/min. Full article. (This article belongs to the Special Issue Leaching of Rare Earth Elements from Various Sources) . .

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Environmental Risks of Mining

In situ leach (ISL) mining. ... (such as the asbestos-like mineral riebeckite) can be absorbed into lung tissue, causing problems like pneumoconiosis and silicosis, commonly known as "Black Lung" (Paul Campbell, 2011). ... According to the Chinese Society of Rare Earths, every ton of REE produced generates 8.5 kilograms of fluorine and 13 ...

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The South Ion-Absorbed Rare Earth Mine Area Remote

1) Interpretation indexes of Ion-absorbed REM area . In general, the beneficiation technologies of Ion-absorbed REM are divided as pond leaching method, heap leaching method and in-situ leaching method three periods. These three technologies have different characters in remote sensing images [6]. The essence of Pond leaching method

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离子吸附型稀土矿原地浸析采矿法-【维普期刊官网】- 中文期刊服

The authors make an approach to the metallogenetic enrichment law of ion-absorbed rare-earth mineral and the principle of in-situ leach mining. According to the test,they make an introduction to the technical process of in-situ leach mining of ion-absorbed rareearth mineral.

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Dynamic pore structure evolution of the ion adsorbed rare ...

Nov 06, 2019  During the leaching process of the ion-adsorbed rare earth (RE) ore, the pore structure evolution of the ore body plays a vital role in the seepage of the leaching

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Anti-adsorption mechanism of ion-adsorption type rare ...

Apr 02, 2018  Tang XZ, Li MN, Yang D. The problem of reabsorption of ion-absorbed rare earth mineral in situ leaching mining and the measure to overcome it. J Central South Univ Technol Sci Technol. 1998;29(6):13. Google Scholar [7] Chi RA, Tian J. Review of weathered crust rare earth ore. J Chin Rare Earth Soc. 2007;25(6):641.

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Environmental Risks of Mining

In situ leach (ISL) mining. ... (such as the asbestos-like mineral riebeckite) can be absorbed into lung tissue, causing problems like pneumoconiosis and silicosis, commonly known as "Black Lung" (Paul Campbell, 2011). ... According to the Chinese Society of Rare Earths, every ton of REE produced generates 8.5 kilograms of fluorine and 13 ...

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An initial life cycle assessment of rare earth oxides ...

Oct 01, 2016  While ILCD does have characterization factors for rare earth elements as part of mineral depletion, the model employed is based on CML method. ... Water pollution prevention method for in-situ leach mining of ion-absorbed rare-earth mineral. Nonferrous Met., 6 (2011), pp. 46-49 (in Chinese) View Record in Scopus Google Scholar.

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CN103255301A - Leaching method of weathered crust ...

The invention provides a leaching method of weathered crust illuviation type ion rare earth ore and relates to improvement of a wet metallurgical rare earth leaching process. The leaching process of the leaching method comprises adding a leaching agent for leaching. The leaching method is characterized in that fulvic acid is further added in the leaching process of the leaching method as a ...

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Aggregate Evolution Mechanism during Ion-Adsorption Rare ...

Nov 21, 2018  2.2. Chemical Replacement. Rare earth elements are found in strong weathered granites in the form of ions. An NH 4 Cl solution is typically used during the leaching process [22, 23].The rare earth cations adsorbed onto the ore body are replaced by NH 4 +, which has relatively active chemical properties, as shown in Formula [].This strong chemical reaction occurs throughout the leaching

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离子型稀土原地浸矿水污染控制措施.pdf-综合论文-在线文档投稿

LI Qing (Beijing General Research Institute of Mining and Metallurgy,Beijing 100070,China) Abstract:When ammonium sulphate as leaching solution is applied in the in-situ leach mining of ion-absorbed rare-earth mineral,the leaching solution permeating underground increases the ammonium concentration in groundwater and pollutes water ...

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Regolith-hosted rare earth element deposits - Wikipedia

Regolith-hosted rare earth element deposits (also known as ion-adsorption deposits) are rare-earth element (REE) ores in decomposed rocks that are formed by intense weathering of REE-rich parental rocks (e.g. granite, tuff etc.) in subtropical areas. In these areas, rocks are intensely broken and decomposed. Then, REEs infiltrate downward with rain water and they are concentrated along a ...

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Minerals Free Full-Text Permeability and Adsorption ...

In order to investigate the influence of the ion exchange process on the permeability of rare earth ore bodies in the leaching process, a laboratory-scale comparative experiment with ammonium sulfate solution and deionized (DI) water as leaching solutions is conducted. Compared with the DI water leaching test, the permeability coefficient of the rare earth ore sample leached by the ammonium ...

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(PDF) An initial life cycle assessment of rare earth ...

An initial life cycle assessment of rare earth oxides production from ion-adsorption clays. Ehsan Vahidi. Download with Google Download with Facebook. or. Create a free account to download. Download Full PDF Package. This paper. A short summary of this paper. 37 Full PDFs related to this paper.

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Experimental Research on the Impact of Ion Exchange and ...

Jan 01, 2018  At present, the in situ leaching mining method is a mature mining technology, which takes advantage of the chemical replacement reaction of leaching solutions in the process of orebody seepage to achieve the recovery of rare earth cations and thus realizes the extraction of rare earth

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rare eart element recovery in situ leaching

in situ leach mining of ion absorbed rare earth mineral. recovery of rare earth elements from clay minerals deposits are the result of in‐situ lateritic weathering of rare‐earth rich host rocks (granitic or igneous), which lead over geological times to the formation of aluminosilicate clays. these very fine mineral particles .

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CN103509944A - Method for in-situ leaching of rare-earth ...

The invention discloses a method for in-situ leaching of rare-earth ores from a weathering crust elution-deposited rare earth ore. The method comprises the following steps: holes are drilled in an ore body and drilled from a humus layer, a completely weathering layer to a half weathering layer of the ore body, a guide pipe with an opened upper part and an opened lower part is inserted into the ...

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Experimental measurements of the permeability ...

First published on 26th March 2018. Two coupling processes—solution seepage and chemical replacement—occur in the in situ leaching process of ion-absorbed-rare-earth ore. In this study, saturated leaching tests were applied to investigate the permeability characteristics of rare earth ore under the hydro-chemical coupling effect.

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Rare Earth Minerals recovery from mining waste - SEESIMA ...

Jul 04, 2019  Although only representing less than 3% of China’s REE deposits, they have a higher content of medium and heavy REE and simpler extraction, being easily extracted by ion exchange with ammonium sulphate solutions. This is the basis for the in situ leaching processes, which avoided the environmental impact of open excavation.

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Rare Earth Elements and Critical Minerals 2020 Virtual ...

Rare Earth Elements Critical Minerals Technology Manger September 15-16, 2020 ... Through ion-exchange or solvent extraction Impurity Removal Leaching Metallothermic Reduction ... One-Step Selective Mineral Acid Leaching Process ~43% REE Recovery Production of

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CN103255301A - Leaching method of weathered crust ...

The invention provides a leaching method of weathered crust illuviation type ion rare earth ore and relates to improvement of a wet metallurgical rare earth leaching process. The leaching process of the leaching method comprises adding a leaching agent for leaching. The leaching method is characterized in that fulvic acid is further added in the leaching process of the leaching method as a ...

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Minerals Free Full-Text Permeability and Adsorption ...

In order to investigate the influence of the ion exchange process on the permeability of rare earth ore bodies in the leaching process, a laboratory-scale comparative experiment with ammonium sulfate solution and deionized (DI) water as leaching solutions is conducted. Compared with the DI water leaching test, the permeability coefficient of the rare earth ore sample leached by the ammonium ...

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Minerals Free Full-Text Kinetics of Rare Earth and ...

Ion-adsorption rare earth ore is the result of the weathering the original rocks in a warm and humid climate. During the progressive weathering process, the granodiorite and volcanic rocks are transformed into clay minerals such as kaolinite, halloysite, and montmorillonite, and the rare earth ions can be adsorbed onto these alumino-silicate minerals through electrostatic attraction.

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(PDF) An initial life cycle assessment of rare earth ...

An initial life cycle assessment of rare earth oxides production from ion-adsorption clays. Ehsan Vahidi. Download with Google Download with Facebook. or. Create a free account to download. Download Full PDF Package. This paper. A short summary of this paper. 37 Full PDFs related to this paper.

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原地浸矿单孔注液稳渗流量计算-《哈尔滨工程大学学报》

Apr 11, 2018  A review of the mining technologies of ion-absorbed rare earth mineral[J]. Chinese rare earths, 2016, 37(3):129-133. [7] SMEDEMA L K, RYCROFT D W. Land drainage[M].

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Aggregate Evolution Mechanism during Ion-Adsorption Rare ...

Jan 01, 2018  Currently, mining is conducted through a relatively mature process known as in situ leaching and mining, which uses mainly chemical exchange reactions composed of a leaching solution during the seepage process of an ore body to recover rare earth cations, thereby extracting rare earth

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Soil characteristics and microbial community response in ...

May 30, 2021  Rare earth elements are very important because of their use in electronic devices, the auto industry, aeronautical manufacturing, and energy conversion (Alonso et al. 2012; Dutta et al. 2016).Ion-adsorbed rare earth minerals are mainly found in South China, especially Jiangxi Province (Zhang et al. 2019).Mining activities often cause a series of hazards to the ecological environment,

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Xenotime - CONCENTRATION OF MINERALS

Formula: YPO 4 Mohs scale hardness: 4.5 Specific gravity: 4.4–5.1 g/cm 3 Rare earth elements: Y, Tm, Dy, Er, Eu, Lu, Tb, Gd, Sc Rare earth content, %: Y 2 O 3 52–61,4 Other constituents, %: ThO 2, UO 2 upto 5; ZrO 2 3; SnO 2, SiO 2 9; (U 3 O 8 3) Mineralklasse: Phosphate thorium and uranium Xenotime is a rare earth phosphate mineral, the major component of which is yttrium orthophosphate.

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Experimental Research on the Impact of Ion Exchange and ...

Jan 01, 2018  At present, the in situ leaching mining method is a mature mining technology, which takes advantage of the chemical replacement reaction of leaching solutions in the process of orebody seepage to achieve the recovery of rare earth cations and thus realizes the extraction of rare earth

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