- Mon - Sat 8:00 - 18:00
- [email protected]
- 0086-21-58386256
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) 21 (3), 179 – 183 . Zuo ...
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. ... 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), 21 ...
In situ leaching of ion-adsorption rare earth element (REE) deposits has released large amounts of REE-containing wastewater. However, the origin, speciation, distribution and migration of REEs in aqueous systems of the mining catchment are poorly understood. Groundwater, surface water, in situ leac …
Ion-absorbed rare earth ores radioactive residues (IREORR) are a class of waste residue from the production of rare earth elements (REEs). Because of its radioactive dose, IREORR are usually stored in waste warehouses. IREORR are difficult to be disposed of. However, it contains relatively high concentrations of REEs, which can …
Xunzhong and Maonan made an introduction to the technical process of in situ leaching of ion-absorbed rare earth minerals, and they proved that this type of in situ leaching had many advantages . Based on the principle of pollution control, Zhu et al. proposed six pollution control measures to serve as reference for mine design, pollution ...
Ion-absorbed rare earth deposits react with the leaching agent during the in situ leaching process through ion exchange and hydration, which change the stability of …
Ion-adsorption-type rare earth ores (IRE-ores) are a vital source of rare earth elements globally. The percolation properties of the ore body significantly determine the ease of rare earth extraction using …
A Review of the mining technologies of ion-absorbed rare earth mineral. J Chin Rare Earth Soc. 2016;37(3):129. ... The problem of reabsorption of ion-absorbed rare earth mineral in situ leaching mining and the measure to overcome it. J Cent South Univ (Sci & Technol). 1998;29(6):523. CAS Google Scholar Chi RA, Wang DZ. Rare …
Currently, in situ leaching technology is widely recommended for the mining of ion-absorbed rare earth ores, which provides the advantages of high efficiency, …
The chemical reaction of ion-adsorption-type rare earth ore during the in situ leaching process is accompanied by ion migration and charge movement, making the leaching process electrochemical in …
rare earth [1, 2]. Ion-absorbed rare earth mainly distributes in seven provinces and regions in South China. It is the stra-tegic resource that is concerned by the whole world and it is titled as the "mother of new materials" and "industrial gold." Currently, ion-absorbed rare earth is mainly exploited by in situ leaching. In leaching ...
To date, three major types of leaching techniques have been developed for IAD mining 16 —namely, pond leaching, heap leaching and in situ leaching, among …
Ion-adsorbed rare-earth ores are mined using in-situ leaching, and their mechanical proper-ties significantly afect the eficient and safe recov-ery of rare earth elements. …
Ganzhou Rare Earth Mining Co., Ltd, China Rare Earth Group Co., Ltd, Ganzhou 341000, China ... used on ion-absorbed rare-earth ores: vat leaching, heap leaching, and in-situ leaching (Yang et al. 2013; ... strength of in-situ rare-earth ore samples and the par-ticle size grading as well as the void ratio. Yin et al.
Table 2 shows the content of REEs obtained using the fermentation broths of Yarrowia lipolytica.As shown in Table 2, the fermentation broths can effectively leach REEs from ion adsorption rare earth ore.Some REEs (Ce, Ho, Er, Tm, Yb and Lu) were not leached, possibly because in addition to the key metabolites (H 3 Cit) that is favorable …
Water Pollution Prevention Method for In-Situ Leach Mining of Ion-Absorbed Rare-Earth Mineral. Li Qing. Environmental Science. 2011; 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 ...
Global resources of heavy Rare Earth Elements (REE) are dominantly sourced from Chinese regolith-hosted ion-adsorption deposits in which the REE are inferred to be weakly adsorbed onto clay minerals.
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 Chi RA, Tian J. Review of weathered crust rare earth ore. J Chin Rare Earth Soc. 2007;25(6):641.
Ion-adsorbed rare-earth ores are mined using in-situ leaching, and their mechanical properties significantly affect the efficient and safe recovery of rare earth elements. However, the mechanism of the change in the mechanical properties of the ore body due to the physicochemical processes caused by leaching remains unclear. To …
The ion-adsorption type rare earth ore is an unconsolidated bed of clay minerals. Column leaching, heap leaching and in situ leaching are used in the industrial practice [].Nowadays, rare earth is recovered by in situ leaching process with (NH 4) 2 SO 4 solution in the industry and precipitated with ammonium bicarbonate. However, there …
situ leaching. In leaching mining, solution of salt leaching. agent is injected into the clay ore through the injection well, ... mineral leaching of ion-absorbed rare earth, hydrated cations ...
Zhou, F. et al. 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. 55, 11328 ...
A clear understanding of the evolution characteristics of leaching solution's damage to the basement rock of ion-adsorbed rare earth deposits is essential in the in situ leaching mining.
Fine particle content significantly affects the in situ leaching of ion-adsorption-type rare earth ores. ... Weakening of mechanical parameters of ion-absorbed rare-earth ores subjected to leaching. ... During the in-situ leaching process of ion-adsorption rare earth ore, the seepage velocity of the leaching solution is one of the …
The most important rare earth minerals are monazite [(Ce, La, Nd)PO 4], bastnaesite [(Ce, La) (CO 3)F], and yttrium phosphorite [YPO 4], which reserves occupy about 95% of the known rare earth resource reserves. Other rare earth minerals are apatite, fluorite and ion adsorption rare earths (IAREs) (Rasoulnia et al., 2021). LREE …
The chemical reaction of ion-adsorption-type rare earth ore during the in situ leaching process is accompanied by ion migration and charge movement, making the leaching process electrochemical in ...
Semantic Scholar extracted view of "Spatiotemporal distribution of residual ammonium in a rare-earth mine after in-situ leaching: A modeling study with scarce data" by Xiaoying Yang et al. ... Ion-absorbed rare earth mines, leached in situ, retain a large amount of ammonium nitrogen (NH_4—N) that continuously releases into the …
During rare earth mining, in-situ leaching technology instead of obsolete pool leaching and heap leaching techniques has been widely used to separate and extract ion-absorbing heavy rare earth ...
The leaching process of ion-absorbed type rare earth ores involves ion exchange between the cations in the electrolyte solution and the REE ions adsorbed on the surfaces of the clay minerals (Chen et al., 2020). However, the changes in clay mineral content and alterations in the clay mineral microstructures in rare earth ores are still …
Almost all known heavy rare earth resources in the world occur in this form [7], and it is significant to effectively exploit ion-absorbed rare earth resources. In ion-adsorbed rare earth ores, REEs are adsorbed on clay mineral surfaces in an ionic state [8]. As such, cation exchange has become the main extraction method of these elements.