Method for separating and recycling valuable metal of ternary lithium battery

• Main Authors: HUANG YAOBO, LI XINRUI, HUANG YAOFENG
• Format: Patent
• Language: Chinese; English
• Published: 12.04.2024
• Subjects: BASIC ELECTRIC ELEMENTS; CHEMISTRY; ELECTRICITY; FERROUS OR NON-FERROUS ALLOYS; METALLURGY; PRETREATMENT OF RAW MATERIALS; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY; PRODUCTION AND REFINING OF METALS; TREATMENT OF ALLOYS OR NON-FERROUS METALS

The invention relates to the technical field of lithium battery material recovery, in particular to a method for separating and recovering valuable metals of a ternary lithium battery. The method comprises the following steps: discharging the waste ternary lithium battery, stripping a metal shell of the battery, crushing the battery in an inert atmosphere environment, calcining crushed fragments in an inert atmosphere, carrying out magnetic separation on the cooled fragments to recover iron substances, separating and recovering copper and aluminum substances through an electrostatic separator, and adding an acid solution to dissolve nickel, cobalt, manganese and lithium elements. Adding ammonia water to control the pH value of the solution, starting stirring and heating reaction, separating out coprecipitate of nickel, cobalt and manganese, and filtering and recycling; and adding a saturated sodium carbonate solution into the filtrate to obtain a white precipitate lithium carbonate, and recovering the lithium