Pipeline leaching process of the anode material of failed lithium-ion batteries

At present, leaching is a key part of wet recovery, the main method to recycle the anode materials of failed lithium-ion batteries. However, tank leaching, generally used in industrial production, is not closed. During the reaction process, some residual impurities in the material will produce gas under the acidic system, which seriously deteriorates the production environment. At the same time, the reaction will consume many acid-base reagents and oxidants and produce a large amount of wastewater and waste acid. In view of these problems, a scheme of using a tubular reactor to leach the cathode material of a failed lithium-ion battery was proposed. The cathode material of failed lithium cobalt oxide was used as the raw material in this experiment. The effects of different conditions on the leaching effect were studied. It is found that the leaching effect of hydrogen peroxide is not ideal, and the leaching rate is effectively improved by using solid reducing agents such as glucose. Under the same conditions, compared with hydrogen peroxide and glucose, the leaching rates of cobalt and lithium increase from 59.18% and 92.57% to 85.95% and 99.47%, respectively.