Method for preparing high-purity NCM salt by recycling waste lithium batteries

Abstract

The invention relates to the technical field of waste lithium battery recycling. The invention discloses a method for preparing high-purity NCM salt by recycling waste lithium batteries. The method comprises the following steps: S1, a pretreatment process, the pretreatment process mainly comprises the following steps: carrying out crushing, screening, leaching, impurity removal and other pretreatments on each waste lithium battery raw material, including the steps of crushing and screening, leaching reaction, iron and aluminum removal, washing and filter pressing and the like; and S2, an extraction procedure: the procedure comprises the procedures of copper extraction, manganese extraction, cobalt extraction, nickel extraction and the like, a filtrate treated in the pretreatment procedureis mainly extracted, copper, manganese, cobalt, nickel and other metal elements are extracted, and a copper sulfate solution, a lithium sulfate solution, a manganese sulfate solution, a cobalt sulfatesolution and a nickel sulfate solution are obtained after extraction. According to the process technology, material consumption is reduced, the resource utilization rate is increased, efficient recycling of metal resources such as nickel, cobalt and manganese is achieved, the yield of nickel, cobalt and manganese can reach 98%, and the yield of copper and lithium can reach 90%.

Description

technical field [0001] The invention relates to the technical field of recycling waste lithium batteries, in particular to a method for recycling waste lithium batteries to produce high-purity NCM salt. Background technique [0002] Lithium battery is a primary battery that uses lithium metal or lithium alloy as the negative electrode material and uses a non-aqueous electrolyte solution. It is different from rechargeable batteries. Lithium-ion batteries are different from lithium-ion polymer batteries. Lithium batteries are often thrown away after use. Misplacement will not only affect the surrounding environment, but also the internal valuable parts will not be well utilized, which will easily cause waste. Therefore, those skilled in the art provide a method for recycling waste lithium batteries to make high-purity NCM salt , to solve the problems raised in the background art above. Contents of the invention [0003] The object of the present invention is to provide a ki...

AI Technical Summary

Problems solved by technology

[0002] Lithium battery is a primary battery that uses lithium metal or lithium alloy as the negative electrode material and uses a non-aqueous electrolyte solution. It is different from rechargeable batteries. Lithium-ion batteries are different from lithium-ion polymer batteries. Lithium batteries are often thrown away after use. Misplacement will not only affect the surrounding environment, but also the internal valuable parts will not be well utilized, which will easily cause waste. Therefore, those skilled in the art provide a method for recycling waste lithium batteries to make high-purity NCM salt , to solve the problems raised in the above background technology