首页> 外国专利> Short-process method for preparing sintered NdFeB magnets with high magnetic properties recycling from NdFeB sludge

Short-process method for preparing sintered NdFeB magnets with high magnetic properties recycling from NdFeB sludge

机译：由NdFeB污泥制备具有高磁性能回收利用的烧结NdFeB磁体的短工艺方法

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摘要

The present invention discloses a short process preparation technology of sintered NdFeB magnets from the NdFeB sludge, which relates to a field of recycle technology of NdFeB sludge. The present invention comprises the following steps: water bath distillation of organics in sludge, ultrasonic cleaning, calcium reduction and diffusion, ultrasonic rinsing in a magnetic field and drying, powders mixing and sintering. NdFeB sludge as raw materials was directly prepared from recycled sintered magnets with high magnetic properties. Most of the organics in the sludge could be removed by a vacuum distillation process with stepwise heating. The ultrasonic rinsing process in a magnetic field could effectively remove the remaining organics. The recycled sintered magnets exhibited good maximum energy product [(BH)_max] of 35.26 MGOe. The present invention has important features, such as the short processing time, efficient environmental protection, high recycling rate and effective utilization rate of rare earth metals.

机译：本发明公开了一种由NdFeB污泥制备NdFeB烧结磁体的短工艺制备技术，涉及NdFeB污泥的循环技术领域。本发明包括以下步骤：对污泥中的有机物进行水浴蒸馏，超声清洗，钙还原和扩散，在磁场中超声清洗和干燥，粉末混合和烧结。钕铁硼（NdFeB）污泥作为原料直接由具有高磁性能的回收烧结磁体制备。污泥中的大多数有机物可以通过逐步加热的真空蒸馏工艺除去。磁场中的超声波冲洗过程可以有效去除残留的有机物。回收的烧结磁体表现出良好的35.26 MGOe的最大能量积[（BH）_{max ]。本发明具有加工时间短，环境保护有效，回收率高，稀土金属有效利用率等重要特征。}

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公开/公告号US9728310B2

专利类型
公开/公告日2017-08-08

原文格式PDF
申请/专利权人 BEIJING UNIVERSITY OF TECHNOLOGY;ANHUI EARTH-PANDA ADVANCE MAGNETIC MATERIAL CO. LTD.;
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申请/专利号US201615133042
发明设计人 DONGTAO ZHANG;XIULIAN HUANG;MENG LI;MIN LIU;WEIQIANG LIU;XIAOFEI YI;XIAOWEN YIN;MING YUE;XIANTAO LI;JINGWU CHEN;
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申请日2016-04-19
分类号H01F1/053;C22C38/60;C22C38/16;C22C38/14;C22C38/12;C22C38/10;C22C38/06;C22C38/00;C22C33/02;B22F1/00;B22F3/087;B22F3/10;B22F3/16;B22F5/00;B22F9/04;B22F9/30;C21B15/00;H01F41/02;
国家 US
入库时间 2022-08-21 13:42:23

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