Recovering method for valuable metal in waste nickel-cobalt-manganese-lithium ion battery

Abstract

The invention relates to a recovering method for valuable metal in a waste nickel-cobalt-manganese-lithium ion battery. The recovering method comprises the steps that (1) the pretreatment procedure isconducted, specifically, the waste nickel-cobalt-manganese-lithium ion battery is disassembled, discharged and broken, and a cathode material and an anode material are roughly selected from the wastenickel-cobalt-manganese-lithium ion battery and broken; sieving is conducted, and powder particles are obtained; and in order to remove water-soluble alkali metal salt such as potassium and sodium which are soluble in water in the powder particles, the powder particles are added with the water and stirred into cleaning liquid slurry, the cleaning liquid slurry is subjected to solid-liquid separation, and then, the obtained powder particles are solid valuable metal recovering raw materials.

Description

technical field [0001] The invention relates to a method for recovering valuable metals in waste nickel-cobalt-manganese lithium-ion batteries. Background technique [0002] Lithium-ion batteries, using lithium alloys [0003] The metal oxide is the positive electrode material, and the graphite is the negative electrode material. According to statistics, the consumption of lithium-ion batteries in the world was 500 million in 2000, and reached 7 billion in 2015. Since the service life of lithium-ion batteries is limited, a large number of waste lithium-ion batteries are also produced. Taking China as an example, it is estimated that in 2020, more than 25 billion lithium batteries will be discarded in my country, with a total weight of more than 500,000 tons. Abandoned lithium batteries contain a large amount of precious metals in the positive electrode, among which cobalt accounts for 5-20%, nickel accounts for 5-12%, manganese accounts for 7-10%, lithium accounts for 2-5...

AI Technical Summary

Problems solved by technology

The two methods have their own advantages and disadvantages: the hydrometallurgy method can recover most metals, but it has extremely high requirements for the classification and management of lithium-ion batteries. It is necessary to classify the batteries according to the cathode, anode and dielectric materials. In addition, it uses a lot of water and needs to be matched sewage treatment unit

[0008] The inventors have found that the above-mentioned method has a large number of processes and is complicated, so the processing cost is very high, so it is difficult to apply it commercially

Images