WET SEPARATION PROCESS FOR WASTE LITHIUM BATTERIES AND USE THEREOF

• Main Authors: ZHAO, Jieming, GONG, Qinxue, LI, Qiang, CHEN, Ruokui, LI, Changdong
• Format: Patent
• Language: English; French; German
• Published: 06.12.2023
• Subjects: BASIC ELECTRIC ELEMENTS; ELECTRICITY; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLIDMATERIALS OR FLUIDS; PERFORMING OPERATIONS; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY; SEPARATING SOLID MATERIALS USING LIQUIDS OR USING PNEUMATICTABLES OR JIGS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS; SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATICTABLES OR JIGS; TRANSPORTING

Disclosed are a wet sorting process for a waste lithium battery and application thereof, which belong to the field of battery material recycling. The wet sorting process includes the following steps of: carrying out wet ball milling on a sorting material of a waste lithium battery to obtain a ball-milled product; screening the ball-milled product to obtain a coarse-grained screened material, a medium-grained screened material and a fine-grained screened material; carrying out wet ball milling, screening, magnetic separation and table concentration on the medium-grained screened material to obtain copper, aluminum and a steel shell; and carrying out flotation, magnetic separation and table concentration on the fine-grained screened material to obtain cathode material powder, graphite, copper and aluminum. According to the wet sorting process, a combined treatment of "reselection, magnetic separation and flotation" is adopted. A recycling rate of the steel shell is 99%, a recycling rate of the graphite ranges from 90% to 92%, a recycling rate of cobalt in the cathode material powder is 99% or above, a recycling rate of nickel is 99% or above, a recycling rate of manganese is 99% or above, a recycling rate of the copper ranges 93% to 95%, and a recycling rate of the aluminum ranges 93% to 95%.