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Method for recovering iron and phosphorus in waste lithium iron phosphate battery
The invention discloses a method for recycling iron and phosphorus in waste lithium iron phosphate batteries, and belongs to the technical field of lithium battery recycling. The invention provides a process for efficiently separating phosphorus and iron elements in the ferrophosphorus slag by using a salt-assisted carbon thermal reduction-water leaching method and recovering a Fe product from the ferrophosphorus slag, and the comprehensive recovery rate of iron by using the process disclosed by the invention is as high as 99.3%. Lithium sulfonate and ferrocene are introduced into the sheet-type zirconia ceramic nanofiltration membrane through a chemical reaction, the compatibility with fine suspended particles containing lithium and iron can be improved, the content of metal impurities in the filtrate can be reduced, efficient separation of iron and phosphorus in the ferrophosphorus slag can be improved, the metal content in the filtrate is lower than 8%, and the minimum metal content can reach 0.06%.
本发明公开了一种废旧磷酸铁锂电池中铁和磷的回收方法，属于锂电池回收利用技术领域。本发明提供了一种盐协助碳热还原‑水浸法，将磷铁渣中磷、铁元素高效分离，从中回收得到Fe产品的工艺，利用本发明的工艺铁的综合回收率高达99.3％。本发明将磺酸锂，二茂铁通过化学反应引到片式氧化锆陶瓷纳滤膜中，可以在水浸滤液过滤中，提高与微细的含锂，铁悬浮颗粒相容性，降低滤液中的金属杂质含量，提高磷铁渣中铁与磷的高效分离，滤液中金属含量低于8％，最低可达0.06％。
Method for recovering iron and phosphorus in waste lithium iron phosphate battery
The invention discloses a method for recycling iron and phosphorus in waste lithium iron phosphate batteries, and belongs to the technical field of lithium battery recycling. The invention provides a process for efficiently separating phosphorus and iron elements in the ferrophosphorus slag by using a salt-assisted carbon thermal reduction-water leaching method and recovering a Fe product from the ferrophosphorus slag, and the comprehensive recovery rate of iron by using the process disclosed by the invention is as high as 99.3%. Lithium sulfonate and ferrocene are introduced into the sheet-type zirconia ceramic nanofiltration membrane through a chemical reaction, the compatibility with fine suspended particles containing lithium and iron can be improved, the content of metal impurities in the filtrate can be reduced, efficient separation of iron and phosphorus in the ferrophosphorus slag can be improved, the metal content in the filtrate is lower than 8%, and the minimum metal content can reach 0.06%.
本发明公开了一种废旧磷酸铁锂电池中铁和磷的回收方法，属于锂电池回收利用技术领域。本发明提供了一种盐协助碳热还原‑水浸法，将磷铁渣中磷、铁元素高效分离，从中回收得到Fe产品的工艺，利用本发明的工艺铁的综合回收率高达99.3％。本发明将磺酸锂，二茂铁通过化学反应引到片式氧化锆陶瓷纳滤膜中，可以在水浸滤液过滤中，提高与微细的含锂，铁悬浮颗粒相容性，降低滤液中的金属杂质含量，提高磷铁渣中铁与磷的高效分离，滤液中金属含量低于8％，最低可达0.06％。
Method for recovering iron and phosphorus in waste lithium iron phosphate battery
一种废旧磷酸铁锂电池中铁和磷的回收方法
WANG ZHONGCHAO (author) / LI BOQIU (author) / MAO SHUYAN (author) / ZHANG HAO (author) / CHEN JIAQI (author) / HU YAN (author) / YANG JING (author)
2024-06-21
Patent
Electronic Resource
Chinese
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