CAJ | 학술논문

采用电解剥离?浸出正极材料、P204萃取除铝、秸秆硫酸浸出电池渣、草酸沉钴等工艺回收废旧锂电池中的钴。结果表明：经过20~30 min的电解剥离，实现了电池粉与铝箔的分离，钴的浸出率为50%，电流效率为70%；通过两次P204错流萃取除铝后，萃余液中Al3+Co 2+含量可以降到0.4 mg/L，而钴却未损失；燕麦秸秆粉?硫酸浸出电池渣中钴的最佳工艺条件如下：硫酸2 mol/L、1 g电池渣加入0.5~0.7 g麦秆粉，固液比1：10，在80~90℃反应1~2 h，钴的浸出率达到98%以上；经三级浸出，COD的含量可降至1.3 g/L左右；草酸沉钴调节溶液温度为50℃， pH为2，保持n()/n(2?24CO)=1，1 h后钴的一次沉淀率达到92%以上，滤液pH为0.2，其滤液可作为电解浸出液循环使用。
채용전해박리?침출정겁재료、P204췌취제려、갈간류산침출전지사、초산침고등공예회수폐구리전지중적고。결과표명：경과20~30 min적전해박리，실현료전지분여려박적분리，고적침출솔위50%，전류효솔위70%；통과량차P204착류췌취제려후，췌여액중Al3+Co 2+함량가이강도0.4 mg/L，이고각미손실；연맥갈간분?류산침출전지사중고적최가공예조건여하：류산2 mol/L、1 g전지사가입0.5~0.7 g맥간분，고액비1：10，재80~90℃반응1~2 h，고적침출솔체도98%이상；경삼급침출，COD적함량가강지1.3 g/L좌우；초산침고조절용액온도위50℃， pH위2，보지n()/n(2?24CO)=1，1 h후고적일차침정솔체도92%이상，려액pH위0.2，기려액가작위전해침출액순배사용。
Cobalt was recycled from spent Li-ion battery through the electrolytic stripping-leaching cathode material, P204 extraction Al, straw sulphuric acid leaching battery slag and oxalate precipitating cobalt. The results show that the battery powder can be separated from aluminum foil after 20?30 min electrolytic stripping process, the cobalt leaching rate is 50% and current efficiency is 70%. After two?stage P204 cross-flow extraction, Al3+Co 2+ remained in the raffinate can be dropped to 0.4 mg/L, and cobalt is not lose. Under the condition of sulfuric acid concentration 2 mol/L, adding 0.5?0.7 g straw powder into 1g battery slag, and liquid-solid ratio 1:10, the cobalt leaching rate is over 98% after 1?2 h in 80?90℃. After three?stage leaching process, COD content can drop to about 1.3 g/L. In oxalate precipitating process, adjusting the pH of solution to 2, keepingn( )/n(2?24CO) of 1, cobalt precipitation rate is above 92% after 1h reaction under 50℃, and pH of the filtrate is 0.2, which can be circulated used as electrolytic leaching liquid.