Method for recycling valuable metals in whole-industry integrated waste lithium ion battery powder

• Main Authors: ZHANG RONGRONG, GONG QINXUE, XU TIANBIN, LU JUNQUE, LIU YONGQI, LI CHANGDONG
• Format: Patent
• Language: Chinese; English
• Published: 02.07.2024
• Subjects: CHEMISTRY; FERROUS OR NON-FERROUS ALLOYS; METALLURGY; PRETREATMENT OF RAW MATERIALS; PRODUCTION AND REFINING OF METALS; TREATMENT OF ALLOYS OR NON-FERROUS METALS

The invention discloses a method for recycling valuable metals in whole-industry integrated waste lithium ion battery powder, and belongs to the technical field of battery recycling. According to the method, battery powder and activated graphite are mixed, roasted and then subjected to acid leaching, graphite floated from leaching residues can continue to return to the roasting stage to be utilized after being activated, ferrous ions in metal leaching liquid are oxidized into iron ions firstly, and then the iron ions are independently removed through an iron removal agent; according to the method, the impurity removal effect is excellent, the graphite and the iron slag can be effectively utilized, resources are fully and effectively utilized, and the treatment cost is low. 一种全产业一体化废旧锂离子电池粉中有价金属的回收方法，属于电池回收技术领域。该方法通过将电池粉与活化石墨混合焙烧后酸浸，其中浸出渣经浮选出的石墨可以经活化后继续返回焙烧阶段利用，而金属浸出液中的亚铁离子先经氧化成铁离子，再经除铁剂单独去除铁离子，得到磷酸铁可用于制作磷酸铁锂电池前驱体，本方法除杂效果优异，并且能够有效利用石墨和铁渣，资源得到了充分有效的利用，且处理成本低。