Shimane University in Japan has developed a new technology for extracting rare earth neodymium from waste magnets under normal temperature and pressure conditions. In the past, the recovery of rare earth resources mostly used hydrochloric acid as a solvent, which was carried out under high temperature and high pressure. There were some difficulties in efficiency and cost. The new technology system successfully developed by the Department of Comprehensive Science and Technology of Shimane University, Japan, uses a mixed solution of sulfuric acid and oxalic acid as a solvent, and uses the kinetic energy of zirconia ball mill to comprehensively process the demagnetized magnet powder at room temperature and pressure High-purity neodymium oxalate with a purity of more than 80% for industrial use can be obtained with high efficiency and low cost, and nearly 100% of the neodymium in the waste magnet can be recovered.
The Patent Office of the Ministry of Economy, Trade and Industry of Japan has published the public gazette of invention patents for this technology method on March 17, 2014. The research team mainly based on Shimane University is collaborating with Japanese companies in resource recycling and chemical equipment to further improve recycling. Purity and improve the recovery capacity of the system. At the same time, the research team is also further studying the use of this system to recover other rare earth and rare metal resources besides neodymium.
This technology has greatly reduced the cost of recycling, and is considered to be an important breakthrough in rare earth recycling technology, which is of great significance for the recycling of rare earth resources.
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