公开(公告)号：US12113187B2

公开(公告)日：2024-10-08

申请号：US18498037

申请日：2023-10-31

申请人： GEM CO., LTD. ,  JINGMEN GEM CO., LTD.

发明人： Kaihua Xu ,  Liangxing Jiang ,  Jian Yang ,  Kun Zhang ,  Chenwei Li ,  Yongan Chen ,  Yanqing Lai

IPC分类号： H01M10/54 ,  C01F11/22 ,  C22B1/02 ,  C22B1/248 ,  C22B3/22 ,  C22B7/00

CPC分类号： H01M10/54 ,  C01F11/22 ,  C22B1/02 ,  C22B1/248 ,  C22B3/22 ,  C22B7/001 ,  C22B7/007 ,  C22B7/008

摘要： The present invention provides a method for recovering valuable metals from waste lithium ion batteries. The method comprises: short-circuit discharging, dismantling, crushing, roasting, and screening on waste lithium ion batteries to obtain active electrode powders; using alkaline solution to wash the active electrode powders, then filtering to remove copper and aluminum; drying the activated electrode powder after alkaline washing treatment, mix the dried activated electrode powder with starch and concentrated sulfuric acid and stir evenly to obtain the mixed material; calcining the mixed material with controlling the atmosphere; taking out the product obtained from calcination and using deionized water to extract the leachate and leaching residue with valence metal ions, and then obtaining the leachate after filtering. The present invention can reduce the concentration of impurity ions in the leaching solution, improve the purity and comprehensive recovery rate of valuable metals, and reduce the recovery cost.