摘要
关于钕铁硼磁体回收的研究越来越受到重视,但在起步阶段回收制备技术是否能够真正带来环境效益是不确定的。采用ReCiPe评价方法,选取制备1 kg黏结钕铁硼磁体为功能单位,分别对黏结钕铁硼磁体直接制备和回收制备流程的环境影响进行评价并对比。结果表明:直接制备流程中对环境影响最大的关键阶段为熔炼阶段,环境影响主要由钕和电力产生;回收制备流程中对环境影响最大的关键阶段为去除有机物阶段和热压固化阶段,环境影响主要由次氯酸钠和电力产生。生产1 kg黏结钕铁硼磁体,直接制备工艺对人体健康损害、生态健康损害和资源耗竭的环境损害分别是回收制备工艺的158.40%、180.63%、63.37%。
Research on the recycling of NdFeB magnets has received more and more attention,however,it is uncertain whether the recycling technology can really bring environmental benefits in the initial stage.The ReCiPe evaluation method was adopted,and producing 1 kg of bonded NdFeB magnets was selected as the functional unit to evaluate and compare the environmental impacts of the production and recycling processes of bonded NdFeB magnets,respectively.Results show that the environmental hot spot in the production process of bonded NdFeB magnets is in the smelting stage,and the environmental impact is mainly generated by neodymium and electricity.The environmental hot spots in the recycling process of bonded NdFeB magnets are in the organic removal stage and the hot-pressing curing stage,and the environmental impact is mainly generated by sodium hypochlorite and electricity.For the manufacture of 1kg bonded NdFeB magnets,the environmental damage to human health and ecosystem diversity,and resource depletion by the production process is 158.40%,180.63%,and 63.37%of the recycling process,respectively.
作者
刘敏
高可
朱佩鸿
杨雅轩
刘卫强
路清梅
岳明
LIU Min;GAO Ke;ZHU Peihong;YANG Yaxuan;LIU Weiqiang;LU Qingmei;YUE Ming(Faculty of Materials and Manufacturing,Beijing University of Technology,Beijing 100124,China)
出处
《北京工业大学学报》
CAS
CSCD
北大核心
2024年第3期290-298,共9页
Journal of Beijing University of Technology
基金
国家重点研发计划资助项目(2021YFB3500800)。
