Recent Trend on the Studies of Recycling Technologies of Rare Earth Metals
Recent Trend on the Studies of Recycling Technologies of Rare Earth Metals
复制标题
稀土金属回收技术研究最新动态
DOI：
10.1007/978-3-030-92563-5_27
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发表时间：
2022
期刊：
影响因子：
--
通讯作者：
Zhu Hongmin
中科院分区：
文献类型：
--
作者：
Takeda Osamu;Lu Xin;Zhu Hongmin
稀土资源供应存在不确定性。稀土的资源节约和替代材料的技术开发是重要的挑战，回收技术的开发对于确保稀土资源的稳定供应也很重要。钕磁铁废料是工业上重要的含稀土金属的产品，目前采用湿法冶金方法回收。然而，湿法冶金方法产生大量的废液并消耗大量的能量。为了开发一种对环境无害的回收工艺，对火法冶金方法进行了各种研究。作者之一开发了熔融金属提取法和熔剂重熔法。火法冶金是一种废物产生量少、能耗低的回收工艺。稀土资源的环保回收利用技术的研究与开发，既要从环境方面考虑，也要从经济方面考虑。
There is uncertainty in the supply of rare earth resources. Technical developments on the resource saving of rare earths and the alternate materials are important challenges, and the development of recycling technologies is also important for securing stable supply of rare earth resources. The waste of neodymium magnet that is the industrially-important product containing rare earth metals is currently recycled by a hydrometallurgical method. However, the hydrometallurgical method generates a large volume of waste solution and consumes a large amount of energy. In order to develop an environmentally-sound recycling process, various studies on pyrometallurgical methods have been conducted. One of the authors developed the molten metal extraction method and the flux remelting method. The pyrometallurgical methods are anticipated as the recycling processes with small waste generation and low energy consumption. Research and development on environmentally-sound recycling technologies for rare earths has to be advanced from environmental aspects as well as economic aspects.