A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Method for high-selectivity separation of rare earth and iron in neodymium iron boron waste
The invention relates to the field of comprehensive recycling of rare earth solid waste resources, in particular to a method for high-selectivity separation of rare earth and iron in neodymium iron boron waste. According to the method, the neodymium iron boron waste is oxidized and roasted, so that metal elements in the neodymium iron boron waste are converted into oxides; the oxidized neodymium iron boron waste is evenly mixed with a silicon additive and a reducing agent to be directly roasted, rare earth in the neodymium iron boron waste is converted into rare earth oxide which is easily dissolved in dilute acid, iron elements are converted into fayalite which is not easily dissolved in dilute acid, then dilute acid is adopted for leaching, and therefore efficient separation of the rare earth and the iron is achieved; and the obtained rare earth leachate can be directly used for recovering the rare earth in an extraction separation production line, and the obtained fayalite can be used as a refractory material. The method has the characteristics of simple process, low cost, less pollution, high selectivity and capability of synthesizing the rare earth and the iron.
本发明涉及稀土固废资源综合回收利用领域，特别涉及一种高选择性分离钕铁硼废料中稀土和铁的方法；在本发明内，将钕铁硼废料氧化焙烧，使钕铁硼废料中的金属元素转化成氧化物；将氧化后的钕铁硼废料与硅添加剂及还原剂混合均匀直接焙烧，使钕铁硼废料中稀土转化为易溶于稀酸的稀土氧化物，铁元素转化为不易溶于稀酸的铁橄榄石，然后采用稀酸浸出，从而实现稀土和铁的高效分离；获得的稀土浸出液，可直接用于萃取分离生产线回收稀土，获得的铁橄榄石可用作耐火材料；本发明具有流程简单、成本低廉、污染少、选择性高、可综合稀土和铁的特点。
Method for high-selectivity separation of rare earth and iron in neodymium iron boron waste
The invention relates to the field of comprehensive recycling of rare earth solid waste resources, in particular to a method for high-selectivity separation of rare earth and iron in neodymium iron boron waste. According to the method, the neodymium iron boron waste is oxidized and roasted, so that metal elements in the neodymium iron boron waste are converted into oxides; the oxidized neodymium iron boron waste is evenly mixed with a silicon additive and a reducing agent to be directly roasted, rare earth in the neodymium iron boron waste is converted into rare earth oxide which is easily dissolved in dilute acid, iron elements are converted into fayalite which is not easily dissolved in dilute acid, then dilute acid is adopted for leaching, and therefore efficient separation of the rare earth and the iron is achieved; and the obtained rare earth leachate can be directly used for recovering the rare earth in an extraction separation production line, and the obtained fayalite can be used as a refractory material. The method has the characteristics of simple process, low cost, less pollution, high selectivity and capability of synthesizing the rare earth and the iron.
本发明涉及稀土固废资源综合回收利用领域，特别涉及一种高选择性分离钕铁硼废料中稀土和铁的方法；在本发明内，将钕铁硼废料氧化焙烧，使钕铁硼废料中的金属元素转化成氧化物；将氧化后的钕铁硼废料与硅添加剂及还原剂混合均匀直接焙烧，使钕铁硼废料中稀土转化为易溶于稀酸的稀土氧化物，铁元素转化为不易溶于稀酸的铁橄榄石，然后采用稀酸浸出，从而实现稀土和铁的高效分离；获得的稀土浸出液，可直接用于萃取分离生产线回收稀土，获得的铁橄榄石可用作耐火材料；本发明具有流程简单、成本低廉、污染少、选择性高、可综合稀土和铁的特点。
Method for high-selectivity separation of rare earth and iron in neodymium iron boron waste
一种高选择性分离钕铁硼废料中稀土和铁的方法
PENG RUZHEN (author) / LIU ZISHUAI (author) / LEI XIANG (author) / LIAO ZHAOCHENG (author)
2021-11-19
Patent
Electronic Resource
Chinese
Method for preparing zinc ferrite from neodymium iron boron waste
| European Patent Office | 2022
Neodymium-iron-boron magnet production and collection vehicle convenient to operate
| European Patent Office | 2024
ANTI-CORROSION PROTECTION FOR PORTABLE TIMEPIECE MAGNETS, IN PARTICULAR NEODYMIUM-IRON-BORON MAGNETS
| European Patent Office | 2022
The TL-5 Electroless Nickel-phosphorus Plating on Neodymium-Iron-Boron Permanent Magnet
| British Library Online Contents | 2002
| British Library Online Contents | 2013