How to dispose of lithium-ion battery waste

Abstract

The present invention provides a more efficient and stable method for recovering valuable metals such as nickel and copper from lithium-ion battery waste by using the treatment in the copper smelting process while reducing the recovery loss of the valuable metals. The treatment method of lithium-ion battery waste of the present invention is a treatment method of lithium-ion battery waste using a converter in the copper smelting process. The copper matte obtained from the self-melting furnace in the copper smelting process is loaded into the converter and blown into the Before the process of obtaining blister copper with oxygen, lithium-ion battery waste is put into a converter or into a ladle used to put copper matte into a converter, and the lithium-ion battery waste is burned by the waste heat inside the converter or ladle.

Description

technical field [0001] The invention relates to a treatment method for lithium-ion battery waste, and relates to a treatment method for recovering valuable metals such as copper and nickel from the lithium-ion battery waste. Background technique [0002] Compared with conventional nickel metal hydride batteries and lead storage batteries, etc., lithium-ion batteries are lightweight, have a large battery capacity, and have a high repeatability. Therefore, in recent years, the scope of application has expanded and they have been widely used. Among such lithium-ion batteries, batteries that have deteriorated such as a decrease in charge capacity after reaching the end of their lifetime or after being used for a certain number of times, or damaged batteries are disposed of. In addition, waste products generated during the manufacturing process of lithium-ion batteries are also disposed of. [0003] It should be noted that used lithium ion batteries, waste products of batteries ...

AI Technical Summary

Problems solved by technology

Therefore, when the lithium-ion battery scrap is put into the melt of a copper smelting furnace for processing, the phosphorus contained in the lithium-ion battery scrap is melted and distributed in the slag, but the phosphorus is easy to adhere to nickel and cobalt, so it is difficult to Completely removing the attached part will require a lot of cost and labor to ensure the quality of valuable metals such as nickel

[0011] In addition, fluorine contained in lithium-ion battery scrap is volatilized into exhaust gas by melting treatment, but in copper melt with a high specific gravity, the gas accumulates and increases in volume, and soon rises rapidly to become the cause of bumping to escape. , which increases the risk. In addition, splashing (scattering) will occur in the smelting furnace to make valuable metals adhere to the furnace wall, or the soot is mixed with valuable metals, which may cause the recovery loss of valuable metals.

Furthermore, the fluorine gasified and contained in the exhaust gas is transferred to the inside of the smelting furnace or the exhaust gas treatment process, which may also cause corrosion of equipment, and may affect the environment by being released into the atmosphere and drainage.

[0012] In this way, from the viewpoint of time, energy, cost, etc., it is effective to recover nickel and copper, which are valuable substances, by throwing lithium-ion battery scrap into the copper smelting process. It will cause the recovery loss of valuable metals. In addition, the phosphorus, fluorine and other components contained in the battery may sometimes affect the recovery of valuable metals.