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Weathered Crust Elution Deposited Rare Earth Ores by Ruan Chi

Weathered crust elution - deposited rare earth ore - was first discovered as a novel exogenous ore in Jiangxi province of China in 1969. ...

Weathered crust elutiondeposited rare earth ores | Request PDF

Weathered crust elution - deposited rare earth ore (original name is the ion-adsorbed rare earth ore) was first discovered as a novel exogenous ore in Jiangxi province of China in 1969.

Leaching Process of Weathered Crust Elution-Deposited Rare ...

Leaching Process of Weathered Crust Elution-Deposited Rare Earth Ore With Formate Salts. Zhuo Chen, 1 Zhenyue Zhang, 1, 2, * and Ruan Chi 1, 2 ...

[PDF] Weathered Crust Elution Deposited Rare Earth Ores ...

Weathered crust elution - deposited rare earth ore (original name is the ion-adsorbed rare earth ore) was first discovered as a novel exogenous ore in Jiangxi province of China in 1969. There are many advantages for the ore which has a widespread distribution, rich reserves, low radioactivity, complete RE partitioning and is rich in middle and ...

Soil−water characteristics of weathered crust elution ...

Rare earth is an important mineral resource of worldwide concern and it is praised as the "industrial vitamins" and "industrial gold". Weathered crust elution-deposited rare earth (also known as ion-absorbed rare earth) is a special mineral resource in southern China [1]. In these ores, rare earth elements which are adsorbed onto

Leaching behaviour of rare earth elements from low-grade ...

Leaching behaviour of rare earth elements from low-grade weathered crust elution-deposited rare earth ore using magnesium sulfate KAIHUA CHEN1,2,3,4, JIANNAN PEI1,2,3,4, SHAOHUAYIN1,2,3,4,*, SHIWEI LI1,2,3,4, JINHUI PENG1,2,3,4ANDLIBO ZHANG1,2,3,4 1 State Key Laboratoryof Complex Nonferrous Metal Resources Clean Utilization, Kunming …

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 …

KINETICS OF WEATHERED-CRUST ELUTION-DEPOSITED …

Weathered-crust, elution-deposited, rare-earth ore is China's unique rare-earth mineral resource.1–3 There are many advantages of the ore: a widespread distribution of rich reserves, a low radioactivity, it is rich in the middle and heavy rare earths, it is an easily extracted rare earth, it is simple to process by leaching giving high ...

Kinetics of leaching rare earth from a weathered crust ...

Request PDF | On Jan 1, 2009, L. Ying-Ting and others published Kinetics of leaching rare earth from a weathered crust elution-deposited rare earth ore …

Weathered Crust Elution-deposited Rare Earth Ores - Ruan ...

Weathered crust elution - deposited rare earth ore (original name is the ion-adsorbed rare earth ore) was first discovered as a novel exogenous ore in Jiangxi province of China in 1969. There are many advantages for the ore which has a widespread distribution, rich reserves, low radioactivity, complete RE partitioning and is rich in middle and heavy rare earth.

Weathered Crust Elution-Deposited Rare Earth Ores ...

Corpus ID: 202177106. Weathered Crust Elution-Deposited Rare Earth Ores @inproceedings{Chi2008WeatheredCE, title={Weathered Crust Elution-Deposited Rare Earth Ores}, author={R. Chi and J. Tian}, year={2008} }

Frontiers | Effects of Ion Characteristics on the Leaching ...

Introduction. Weathered crust elution-deposited rare earth ore is of extremely high economic and strategic value, it is a special rare earth resource in the world (Simandl, 2014; Zhang B. et al., 2018; Zou et al., 2020).As a unique resource, it contains almost rare earth elements, including the light rare earth and middle and heavy rare earth, being especially rich in middle and heavy rare ...

CN104459083A - Mineral prospecting method for middle and ...

The invention relates to a mineral prospecting method for a middle and heavy rare earth enrichment area of weathered crust elution-deposited rare earth ore. The method comprises steps as follows: (1), chemical sampling analysis is performed on different positions of a mine area of the weathered crust elution-deposited rare earth ore, and the enrichment area of the weathered crust elution ...

Leaching behaviour of rare earth elements from low-grade ...

Characterization of the weathered crust elution-deposited rare earth ores. The XRD pattern of the ore sample is presented in Fig. 1. The ore consists mainly of quartz (~53%) and kaolinite (29%) and minor illite-mica (~6%) and K-feldspar (~6%). REOs or other REE minerals were not detected probably due to their low abundance.

CN103509943A - Method for recovering rare earth from ...

The invention discloses a method for recovering rare earth from weathering crust elution-deposited rare earth residual liquid flowing out after mine closure through a heap leaching technology and an in-situ leaching technology. The method comprises the following steps: collecting the rare earth residual liquid from liquid collecting ditches at the bottoms of ore …

Weathered crust elution-deposited rare earth ores in ...

Summary. Weathered crust elution - deposited rare earth ore (original name is the ion-adsorbed rare earth ore) was first discovered as a novel exogenous ore in Jiangxi province of China in 1969. There are many advantages for the ore which has a widespread distribution, rich reserves, low radioactivity, complete RE partitioning and is rich in ...

Weathered Crust Elution- Deposited Rare Earth Ores ()

Weathered Crust Elution- Deposited Rare Earth Ores : Chi, Ruan/ Tian, Jun : 300 : 765.00 ISBN: 9781604563870

The basic research on the weathered crust elution ...

The basic research was reviewed about the weathered crust elution-deposited rare earth ore for over forty years,including the causes and the characteristics of the deposit,the compositions and properties of rare earth ore,the relationship between rare earth ore and clay mineral as well as the theory of the adsorption and migration of rare earth in the clay mineral.Great attentions …

CHINA'S RARE EARTH ORE DEPOSITS AND BENEFICIATION

CHINA'S RARE EARTH ORE DEPOSITS AND BENEFICIATION ... the Weishan REE Ore Deposit in Shandong Province and the Weathered Crust Elution−deposited Rare Earth Ore (The Ion Adsorp on Type Rare Earth Ore) mainly in Jianxi ... As shown in Figure 2, after crushing the ore is ground to 90 – 95% passing 0.074 mm. By LIMS ...

A Study on Removal of Rare Earth Elements from U.S. Coal ...

Jan 04, 2016· The REEs present in weathered crust elution-deposited ores exist largely as ion-exchangeable phases on clay minerals. While the particular type of ion-exchangeable clay that is a commercial REE-bearing ore in China had not been thought to exist outside China as of 2013,[ 34 ] ion-adsorbed REEs have been found associated with clays elsewhere.

Effects of Ion Characteristics on the Leaching of ...

To reveal the ion-exchange mechanism in the leaching process of weathered crust elution-deposited rare earth ores with different leaching agents, the effects of a variety of cations and anions at different concentrations on the leaching process were investigated, including Al 3+, Fe 3+, Ca 2+, Mg 2+, Na +, K +, NH 4 + and Cl −, NO 3-, and SO 4 2-.Meanwhile, the …

Leaching Process of Weathered Crust Elution-Deposited Rare ...

Dec 03, 2020· ore body. The purpose of this paper is to explore the. leaching kinetic process of rare earth and aluminum from. weathered crust elution-deposited rare earth ores …

ResearchontheNegativeExternalitiesEvaluationforthe ...

crushing and mineral processing processes and directly through immersion to obtain rare earth oxides and in the military, metallurgy, petrochemical, ceramics, and other fields of application are quite extensive. China is the first country to mine and utilizes weathered crust elution-de-posited rare earth ore. It began in the mid-1960s in the

Novel solution injection technology for in-situ leaching ...

Weathered crust elution-deposited rare earth ore is a special rare earth resource in the world, which is rich in the middle and heavy rare earths (Nesbitt, 1979; Zhang et al., 2013). As a resource of rare earth, the weathered crust elution-deposited rare earth ore has drawn the attention in the globe area. The minerogenic reason of the weath-

Leaching hydrodynamics of weathered elution-deposited rare ...

The enhanced leachability of rare-earth ore from the lean weathered crust elution-deposited rare-earth ores with ammonium sulfate solution as …

Kinetics on leaching rare earth from the weathered crust ...

Abstract In this paper, the kinetic of leaching rare earth from the weathered crust elution-deposited rare earth ores with ammonium sulfate solution was investigated. The effects of the main leaching parameters such as temperature and ore particle size on leaching process were examined and discussed in order to elucidate the kinetics and mechanism of leaching rare earth.

Process optimization of rare earth and aluminum leaching ...

there is an ever-increasing demand for rare earth (RE) elements in the international markets, especially for the mid-heavy rare earth[1,2]. The weathered crust elution- deposited RE ores, also named ion-adsorption RE ore, is the main source of mid-heavy RE in the world[3]. In a warm and humid climate, original rocks contained RE

Weathered Crust Elution-Deposited Rare Earth Ores

Weathered crust elution - deposited rare earth ore (original name is the ion-adsorbed rare earth ore) was first discovered as a novel exogenous ore in Jiangxi province of China in 1969. There are many advantages for the ore which has a widespread distribution, rich reserves, low radioactivity, complete RE partitioning and is rich in middle and ...

Research on the Negative Externalities Evaluation for the ...

The three-generation leaching process of weathered crust elution-deposited rare earth ore has one thing in common, which is that by burning wood or coal, the newly leached oxalic or carbonic rare earth burns into rare earth mixtures, which emit many toxic and harmful exhaust gas such as smoke, dust, and SO 2 .

Leaching Process and Mechanism of Weathered Crust Elution ...

The leaching processes and mechanisms of weathered crust elution-deposited rare earth (RE) ores with ammonium sulfate were investigated for their high efficiency and low consumption exploitation. The leaching process is a typical reversible heterogeneous ion exchange reaction in liquid–solid systems.