rare earth ore leaching and adsorption professional

  • Reduction leaching of rare earth from ion-adsorption type ...

    Nov 01, 2017 · The rare earth leaching efficiency were about 85.50% and about 50% of the colloidal phase rare earth was extracted when with 0.20 mol/L FeSO 4 leaching agent in pH 2.00. The mechanism of reduction leaching had been detailed explained with Eh-pH diagram of cerium in the paper ( Xiao et al., 2016b ).

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  • Kinetics model for leaching of ion-adsorption type rare ...

    Dec 01, 2020 · 1. Introduction. Ion-adsorption type rare earth ores (IATREO) are important source of heavy rare earth.1, 2, 3 In these ores, rare earth ions are adsorbed on the surface of clay minerals in the form of hydrated ions or hydroxyl hydrated ions.4, 5, 6 At present, they are exploited through in-situ leaching technology using a leaching agent such as ammonium sulfate solution. 7, 8 In-situ leaching ...

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  • Recovery of rare earth from the ion-adsorption type rare ...

    Aug 01, 2016 · Hence, our lab proposed a new technology (Huang et al., 2010) that provided the recovery of rare earth from ion-adsorption type rare earths ore with magnesium salt leaching system. With this new technology, ammonia nitrogen emissions can be reduced or even eliminated from the source, and may be environmentally-friendly to water and mine.

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  • Adsorption ability of rare earth elements on clay minerals ...

    May 01, 2016 · The adsorption behaviors of rare earth elements on clay minerals would have great influence on the mineralization process and the leaching process of the ion-adsorption type rare earths ore. In this work, the adsorption thermodynamics of REEs on

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  • Recovery of rare earth elements adsorbed on clay minerals ...

    Apr 01, 2012 · rare earth elements (ree) adsorbed on clays are recovered by leaching with monovalent salt solutions. the mechanism is a fast kinetics ion-exchange process between m (i) and ln (iii). ree leaching efficiency decreased in the order cs + > nh 4+ > na + > li +. sulfate-based lixiviants offer better extraction levels than chlorides under same

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  • A mathematical model for column leaching of ion adsorption ...

    高达12%返现 · Apr 14, 2020 · Column leaching experiments with ion adsorption-type rare earth ores for different lixiviant concentrations and different column heights were carried out. A mathematical model of column leaching was constructed based on the experimental data.

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  • Adsorption of rare earth elements in regolith-hosted clay ...

    Sep 01, 2020 · Regolith-hosted ion-adsorption deposits (IADs), formed by subtropical weathering of igneous rocks, are the world’s primary source for heavy rare

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  • A Short Review on REE Recovery from Ion-Adsorption Clays

    May 13, 2019 · 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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  • Extraction of Rare Earth Elements from non- Chinese Ion ...

    Extraction of Rare Earth Elements from Ion Adsorption Clays Proceedings of EMC 2015 3 2 Theoretical background of REE-recovery from Ion Adsorption Clays The leaching of rare earth elements (REE) from ion adsorption clays (IAC) has a long tradition in Chinese REE processing.

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  • Leaching of Rare-Earth Elements and Their Adsorption by ...

    When the concentration of ammonium sulfide was 1%, leaching time was 3 h, and S/L ratio was 0.09, the leaching ratio of Nd was 67.3%. In the adsorption process, when dosage of phormidium was 0.2 kg/L, the contact time was 30 min, and the temperature was 298 K, while pH was kept at the initial value (i.e. pH 5.6), the adsorption density of Nd ...

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  • Permeability and Adsorption–Desorption Behavior of Rare ...

    Oct 07, 2020 · 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

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  • Extraction of Rare Earth Elements from non- Chinese Ion ...

    Extraction of Rare Earth Elements from Ion Adsorption Clays Proceedings of EMC 2015 3 2 Theoretical background of REE-recovery from Ion Adsorption Clays The leaching of rare earth elements (REE) from ion adsorption clays (IAC) has a long tradition in Chinese REE processing.

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  • (PDF) An overview of rare-earth recovery by ion-exchange ...

    An overview of rare-earth recovery by ion-exchange leaching from ion-adsorption clays of various origins. ... rare-earth ores (ion-adsorption cla ys) ... discovered in 1969 in the Jiangxi Pro vince

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  • AggregateEvolutionMechanismduringIon-AdsorptionRare ...

    Ion-adsorption rare earth ore, also known as weathering shell leaching rare earth ore, was first discovered in a foot cave in Longnan County, Jiangxi Province, in the late 1960s. Ion-adsorption rare earth ore is found in shallow, weathered rock formations [1–5]. Currently, mining is conducted through a relatively mature process known as in situ

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  • (PDF) Rare earth metals sorption recovery from uranium in ...

    The adsorption affinity of the resin for the different rare-earth ions lies in the order La3+ > Eu3+ > Y3+, while the static equilibrium adsorption capacity is 0.73 mmol g−1, 0.51 mmol g−1 ...

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  • Microbial communities in rare earth mining soil after in ...

    In-situ leaching technology is now widely used to exploit ion adsorption rare earth ore, which has caused serious environmental problems and deterioration of mining soil ecosystems. However, our knowledge about the influences of mining operation on the

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

    mountaintop mining and heap leaching techniques it is estimated that for the production of 1 t rare earth oxide from ion-adsorption rare earth ores, 300 m2 vegetation and topsoil are removed, 2000 t tailings are disposed into adjacent valleys and streams, and 1000 t wastewater containing high

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  • Mineral properties and leaching characteristics of ...

    Sep 01, 2017 · Rare Earth (in Chin.), 1996, 17(2): 29. [9] Yao H Q, Ouyang K X, Rao G H. A study on leaching rare earth from the weathered crust elution-deposited rare earth ore with compound leaching reagent. Jiangxi Science (in Chin.), 2005, 23(6): 721. [10] Zhang C G. Leaching the weathered crust elution-deposited rare earth ore with compound leaching reagent.

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  • A Short Review on REE Recovery from Ion-Adsorption Clays

    May 13, 2019 · 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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  • Selective recovery of rare earth elements from ion ...

    Ion-adsorption rare earth element (REE) ores are strategic mineral resources, particularly for heavy REEs. To reduce the amount of nitrogen in the form of ammonia in waste waters and to increase the low recovery efficiency of the current extraction process for REEs, we developed a novel environmentally friendly stepwise solvent extraction method for the separation and enrichment of REEs.

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  • US Patent Application for METHOD FOR OPTIMIZING LIQUID ...

    Mar 11, 2021 · The present disclosure provides a method for optimizing a liquid injection process of ionic rare earth ore, including the following steps of: 1) testing the hydraulic properties of an ore body; 2) determining the diffusion degree of the ore body; 3) determining the spatial distribution of the rare earth grade and the impurity grade of the ore body prior to leaching; 4) determining model ...

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  • Selective Extraction of Rare Earth Elements from Monazite ...

    Jan 04, 2019 · The behavior of rare earth, thorium, and iron during selective extraction of rare earth ores was discussed. Our findings indicated that rare earth-bearing monazite ores may be selectively treated to separate iron and thorium from rare earth elements if submitted to sulfation, roasting at 700 °C, and water leaching under controlled pH.

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  • 肖燕飞 | Semantic Scholar

    Expand. Method for recovering rare earth in ion adsorption type rare earth ore leaching solution through fractional precipitation. 肖燕飞, 黄莉, 徐志峰, 杨凤丽, 叶信宇. Materials Science. 8 October 2015. The invention discloses a method for recovering rare earth in an ion adsorption type rare earth ore leaching solution through ...

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  • Selective Leaching of Rare Earth Elements from Ion ...

    Selective Leaching of Rare Earth Elements from Ion-Adsorption Rare Earth Tailings: A Synergy between CeO 2 Reduction and Fe/Mn Stabilization Environ Sci Technol . 2021 Jul 26. doi: 10.1021/acs.est.1c03106.

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  • Mineral-leaching chemical transport with runoff and ...

    technique for rare-earth ore is pond leaching, and ponding is one of the most prevalent mining methods. First, the subsur-face ore body is mined, and the material is placed in an am-monium sulfate leaching pond to create a rare-earth solution. The REEs in the collected leaching solution are

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  • Study on Rare Earth Elements Leaching from Magnetic Coal ...

    Aug 02, 2021 · The standard solution used was a rare earth element mix for ICP from Sigma-Aldrich containing Sc, Y, La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, and Lu of 50 mg/L each in 2% nitric acid solution. Analysis of rare earth elements concentration was carried out using ICP-OES (Optima 8300, Perkin Elmer, USA). Leaching of Rare Earth Elements

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  • Ultrasound-assisted leaching of rare earths from the ...

    The in situ leaching process of China's unique ion-adsorption rare earth ores has caused severe environmental damages due to the use of (NH 4) 2 SO 4 solution. This study reports that magnesium sulfate (MgSO 4) as a leaching agent would replace (NH 4) 2 SO 4 by ultrasonically assisted leaching to deal with the ammonia-nitrogen pollution problem and enhance leaching process.

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  • (PDF) Rare earth metals sorption recovery from uranium in ...

    The adsorption affinity of the resin for the different rare-earth ions lies in the order La3+ > Eu3+ > Y3+, while the static equilibrium adsorption capacity is 0.73 mmol g−1, 0.51 mmol g−1 ...

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  • (PDF) A Short Review on REE Recovery from Ion-Adsorption Clays

    May 28, 2019 · In ion-adsorption ores, ... in the leaching process of weathered crust elution-deposited rare earth (RE) ores, the effects of ammonium concentration,

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  • AggregateEvolutionMechanismduringIon-AdsorptionRare ...

    Ion-adsorption rare earth ore, also known as weathering shell leaching rare earth ore, was first discovered in a foot cave in Longnan County, Jiangxi Province, in the late 1960s. Ion-adsorption rare earth ore is found in shallow, weathered rock formations [1–5]. Currently, mining is conducted through a relatively mature process known as in situ

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  • Progress, Challenges, and Perspectives of Bioleaching for ...

    May 07, 2021 · Rare earth elements are commonly found in tungsten carbide, monazite, xenon ore, and recently adsorbed ion clays; therefore, acidic or alkaline recovery routes are required [75, 76]. Both autotrophic and heterotrophic microorganisms can be used to leach rare earth elements [77, 78].

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  • Geology of Rare Earth Deposits

    • Stephen Castor, Rare Earth Deposits of North America, Resource Geology V58, 337-347. • Rozelle, P.L.,et al., 2016, A Study on Removal of Rare Earth Elements from U.S. Coal Byproducts by Ion Exchange, Metallurgical and Materials Transactions E, V3, 6 -17. • Foley and Ayuso, 2015, REE enrichment in granite -derived regolith deposits

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  • Rare Earths and the Balance Problem | SpringerLink

    Jan 08, 2015 · Cerium is the dominating rare-earth element in LREE-rich ores (bastnäsite and monazite), while yttrium is the main rare-earth element in HREE-rich ores (xenotime and ion-adsorption ores). The availability of the individual REEs is of concern for applications that require the use of pure REEs, such as phosphors and permanent magnets.

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  • US Patent Application for METHOD FOR OPTIMIZING LIQUID ...

    Mar 11, 2021 · The present disclosure provides a method for optimizing a liquid injection process of ionic rare earth ore, including the following steps of: 1) testing the hydraulic properties of an ore body; 2) determining the diffusion degree of the ore body; 3) determining the spatial distribution of the rare earth grade and the impurity grade of the ore body prior to leaching; 4) determining model ...

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  • A Study of the Occurrence of Selected Rare-Earth Elements ...

    Jan 22, 2019 · The concentration of rare-earth elements (REE), i.e., the group of the lanthanides plus Y and Sc, is much higher in karst bauxites than in lateritic or Tikhvin-type bauxites, due to crystallization and accumulation of authigenic REEs-bearing minerals, and adsorption of ions on clays, gibbsite, and diaspore minerals [3,4,5,6].

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  • Extraction of Rare-Earth Elements from Iron-Rich Rare ...

    Bayan Obo is the largest exploited iron-rich rare-earth deposit. The ore contains up to 6% REO and 35% Fe. More than 90% of rare-earth elements in the ore exist as independent minerals, and about 4 to 7% of the total rare-earth minerals are disseminated in the iron-oxide minerals. The deposit contains

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  • Technology development for rare earth cleaner ...

    Mar 25, 2015 · In regard to the low rare earth concentration in the leaching solution of ion-adsorption clays of rare earth deposit, Huang et al. [] developed a new extraction process to enrich rare earth using individual P204 and P507 as extractant step by step, without previous saponification.Rare earths can also gain the preliminary separations during the enrichment process.

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