中文摘要：

采用一种普适性方法从失效锂离子电池中浸出有价金属。含钴失效锂离子电池经焙烧预处理脱除有机物，与硫酸钠、浓硫酸混合均匀后进行硫酸化焙烧，其中的有价金属转化为硫酸盐，在质量浓度为5g／L的稀硫酸溶液中完全浸出。试验结果表明：当硫酸化焙烧温度为500℃时，电池中的有价元素Li、Co、Cu、Al等可完全转化为硫酸盐；适当提高浓硫酸的配入量，焙烧温度可降低至400℃；焙烧过程中无浓硫酸存在时，硫酸钠不发生物相转化，仅对其他金属的转化过程起促进作用。

英文摘要：

A universal method was developed for leaching valuable metals from cobalt-containing spent lithium-ion batteries （LIBs）. Organic materials were first removed from the spent batteries by roast- ing, then the roasted residue was blended with sodium sulfate and concentrated sulfuric acid. Metals in the mixture were further transformed into sulphates by sulfatizing roasting： The sulphates were dissolved in sulfuric acid solution of 5 g/L. The results showed that when sulfatizing roasting temperature reached to 500 ℃, all of Li, Co, Cu and Al in roasted residue could be completely translated into sulphates. Roasting temperature could be decreased to 400℃ by increasing adding amount of concentrated sulfuric acid in roasting process. Sodium sulfate did not convert to other phases when no concentrated sulfuric acid existed, but played a driving role in other metals conversion process.