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一种钕铁硼永磁材料回收料高值化再利用的方法及系统

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10Claims · 2 independent
§ Ⅰ

Dossier Overview

Inventor

张志宏; 詹前营

Filing Date

Jun 15, 2026

Publication Date

Oct 27, 2026

IPC Classification

C22B 59/00 (2006.01)H01F 1/057 (2006.01)C22B 7/00 (2006.01)

本发明公开了钕铁硼永磁材料回收料高值化再利用方法及系统。分类预处理单元对废料分类,块状料表面清理后氢破碎,泥状粉料脱油脱脂干燥后入控氧焙烧单元,于3%至8%氧气气氛中650至780℃焙烧,使铁选择性氧化为四氧化三铁、稀土转为氧化物。产物入氢还原熔分单元,氢气中850至950℃还原为金属铁,惰性气氛中1250至1350℃熔化分离得稀土渣相和铁基合金相。渣相经硝酸浸出、pH分段除铁铝、草酸沉淀稀土并煅烧得混合稀土氧化物,与氢破碎粉料混合,补加重稀土和微量元素,熔炼速凝铸片制得再生钕铁硼合金。

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