还原扩散法回收钕铁硼油泥制备再生烧结磁体研究  

Study on Preparation of Regenerated Sintered Magnets by Reduction Diffusion Recovery of NdFeB Sludge

作　　者：李现涛 岳明[3] 周少雄[1,2] 况春江[1] 张广强[1] 曾宏[1] LI Xiantao;YUE Ming;ZHOU Shaoxiong;KUANG Chunjiang;ZHANG Guagqiang;ZENG Hong(Advanced Technology&Materials Co.,Ltd.,Beijing 100081,China;Central Iron and Steel Research Institute,Beijing 100081,China;College of Materials Science and Engineering,Beijing University of Technology,Beijing 100124,China)

机构地区：[1]安泰科技股份有限公司,北京100081 [2]钢铁研究总院,北京100081 [3]北京工业大学材料科学与工程学院,北京100124

出　　处：《有色金属工程》2019年第11期28-31,共4页Nonferrous Metals Engineering

基　　金：国家重大仪器设备开发专项(2014YQ12035107)~~

摘　　要：利用还原扩散法回收钕铁硼油泥制备了再生烧结磁体。利用草酸盐共沉淀的方法将钕铁硼油泥废料制备成铁和稀土元素的混合氧化物,再利用还原扩散的方法将混合氧化物转化成钕铁硼粉末。最后通过纳米NdHx掺杂、取向压型和烧结退火制备出再生烧结磁体。所得再生磁体的最优磁性能为:剩磁(Br)为1.201T,矫顽力(Hci)为517.6kA/m,最大磁能积﹝(BH)max﹞为258.0kJ/m^3。Regenerated sintered magnets were prepared by recovery of NdFeB sludge by reduction diffusion process.Method of oxalate coprecipitation is used to obtain a mixed oxide containing rare earth and iron from the NdFeB sludge and eduction diffusion method is applied to prepare NdFeB powders from the mixed oxide.Finally,a regenerated sintered magnet was prepared by nano-NdHxdopping,orientation molding,and sintering annealing.The optimum magnetic properties of the obtained regenerated magnets were:remanence(Br)of 1.201T,coercivity force(Hci)of 517.6kA/m,and the maximum energy product﹝(BH)max﹞of 258.0kJ/m^3.

关 键 词：钕铁硼烧结磁体 还原扩散法 油泥 回收 

分 类 号：TM273[一般工业技术—材料科学与工程]