Enhanced characteristics and mechanism of static magnetic field on ion-absorbed rare earth precipitation

Wang, Junfeng; Zhu, Dongxia; Fang, Xihui; Qiu, Tingsheng; Liu, Yanbo; Zhu, Hualei

doi:10.1016/j.minpro.2016.11.017

Cited by 10 publications

(2 citation statements)

References 8 publications

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“…Recently, chemical precipitation − and ion-adsorption − were widely adopted for enrichment of low concentration rare earths from the leaching solutions of ion-adsorption ores. The ion-adsorption method is simple and easy to operate.…”

Section: Introductionmentioning

confidence: 99%

Enrichment of Low Concentration Rare Earths from Leach Solutions of Ion-Adsorption Ores by Bubbling Organic Liquid Membrane Extraction Using N1923

Liu

Huang

et al. 2017

ACS Sustainable Chem. Eng.

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A new bubbling organic liquid membrane extraction using primary amine N1923 at large 24 aqueous-to-oil phase ratios was suggested to extract and enrich extremely low concentration rare 25 earths from the acidic sulfate leach solutions of ion-absorbing type rare-earth ores. It was revealed 26 that bubbling organic liquid membrane extraction was in fact an interfacial chemical reaction of 27 organic extractant molecules absorbing at the surface of organic liquid membrane supported by gas 28 bubbles with the target metal ions in the aqueous solutions. Rare earths with concentration about 100 29 mg/L can be extracted selectively and enriched efficiently into the organic extractant liquid 30 membrane layer covered on the surface of dispersed gas bubbles. However, Al in leach solutions was 31 not extractable and remained in the raffinates, due to a kinetic non-equilibrium separation behavior 32 of rare earths and Al on the surface of organic liquid membrane. It was the differences in reaction 33 rate of rare earths and Al with primary amine N1923 that intensified their separation. The separation 34 coefficient of rare earths to Al could reach 44.89. The extraction raffinate, flowing-out from the 35 extraction tower after large-phase-ratio extraction, contains aluminium sulfate and can be returned 36 back to displace traditional ammonium sulfate for performing in-situ leaching of rare earths from the 37 ion-adsorption ores. The leaching percentage of rare earths was high up to 84.4%. The present work 38 highlights an environmentally friendly and green sustainable new approach to treat the ion-adsorbing 39 type rare-earth ores by combining leaching and solvent extraction processes together to solve the 40 problems from ammonia and nitrogen pollution during traditional processes using ammonium sulfate 41 to leach rare-earth ores and ammonium bicarbonate to precipitate rare earths. 42

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Section: Introductionmentioning

confidence: 99%

Enrichment of Low Concentration Rare Earths from Leach Solutions of Ion-Adsorption Ores by Bubbling Organic Liquid Membrane Extraction Using N1923

Liu

Huang

et al. 2017

ACS Sustainable Chem. Eng.

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show abstract

“…Judging from the current scientific and technological achievements, although some scientific and technological progress has been made, the results are not good. In order to better protect rare earth resources, China's established rare earth strategic resource reserve system should be implemented and perfected as soon as possible [ 22 ]. The unified export of rare earth products has also better maintained the reasonable price of rare earth, but there are also unreasonable problems, such as neglecting the management and protection of light rare earth and failing to adjust the relationship between rare earth development and environmental protection.…”

Section: Economic Significance Of Rare Earth Resourcesmentioning

confidence: 99%

Study on Economic Significance of Rare Earth Mineral Resources Development Based on Goal Programming and Few-Shot Learning

Zhang

2022

Computational Intelligence and Neuroscience

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Rare earth is one of the most important strategic minerals in the world today. The wide application of new products and technologies in the global market has made the world’s demand for rare earth resources grow rapidly. As an important basic resource of high technology, rare earth plays a significant role in national security and strategy. As rare earth mineral resources are irreplaceable in civil, military, and nuclear industries, they have become national strategic resources of various countries in the world. Although China’s rare earth industry has occupied a leading position in the world, with the continuous expansion of the scale of the rare earth industry, the pollution problem of “three wastes” produced in the recovery of rare earth mineral resources is becoming more and more serious. From the perspective of resource endowment, China is rich in rare earth resources, but the declining trend of resource reserves is obvious, and the advantages and disadvantages of resources are more prominent. Based on the goal planning and few-shot learning, this paper studies the economic significance of rare earth resource development, aiming at solving some problems in the development of rare earth mineral resources in China, and thus promoting the scientific and healthy development of the rare earth industry.

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Controllable enhancement of mass transfer kinetics related with the thickness of organic thin-layer liquid membrane on surface of gas bubble

Liu

Jia

Song

et al. 2022

Chemical Engineering and Processing - Process Intensification

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Enhanced characteristics and mechanism of static magnetic field on ion-absorbed rare earth precipitation

Cited by 10 publications

References 8 publications

Enrichment of Low Concentration Rare Earths from Leach Solutions of Ion-Adsorption Ores by Bubbling Organic Liquid Membrane Extraction Using N1923

Enrichment of Low Concentration Rare Earths from Leach Solutions of Ion-Adsorption Ores by Bubbling Organic Liquid Membrane Extraction Using N1923

Study on Economic Significance of Rare Earth Mineral Resources Development Based on Goal Programming and Few-Shot Learning

Controllable enhancement of mass transfer kinetics related with the thickness of organic thin-layer liquid membrane on surface of gas bubble

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