Shulou(Shulou.com)11/24 Report--

CTOnews.com, September 17 (Xinhua)-- according to the scientific and technological achievements evaluation meeting held by Xinhua News Agency in Meizhou City, Guangdong Province, on the 15th, Chinese scientists have successfully developed the weathering crust type rare earth ore electric drive mining technology, with the rare earth recovery rate increased by about 30%, the impurity content reduced by about 70%, and the mining time shortened by about 70%.

CTOnews.com, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, learned from the official account of Guangzhou Institute of Geochemistry of the Chinese Academy of Sciences that in view of the existing weathering crust type rare earth ore mining technology (ammonium salt in-situ leaching technology), the project pioneered the weathering crust type rare earth ore electric drive mining technology in the world, such as serious ecological environment damage, low resource utilization efficiency, long leaching cycle and so on. Through interdisciplinary and comprehensive research, the project team revealed the activation-migration-enrichment mechanism and its controlling factors of rare earth ions in the weathering crust under the condition of external electric field, and expounded the reaction mechanism of "self-impurity removal" process in electric drive mining. The simulation experiment, scale-up test and site demonstration show that, compared with the existing mining technology, the electric flooding mining technology of weathering crust type rare earth ore is significantly optimized in the aspects of rare earth recovery, leaching agent dosage, mining cycle and impurity removal, etc. it is a new green and efficient technology for weathering crust type rare earth mining.

In an exclusive interview with Science News, Professor A. Borst, chief scientist of key metals at the European Horizon Project, called it a "game-changing" technology. The related achievements have published 11 high-level papers in Nature Sustainability and other journals, 7 authorized invention patents (including 1 international invention patent), and built a demonstration project of 5000 tons (earthwork scale). The research team said that it will step up the improvement of technology integration and accelerate the industrial application of related achievements.

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