The present invention provides a method for treating at least one lithium ion battery enclosed in a housing containing aluminum, comprising heating the lithium ion battery using a combustion furnace in which a combustion object is incinerated by flames, while preventing the flames from being directly applied to the housing of the lithium ion battery.

The present disclosure provides a method for recovering nickel and cobalt, the method comprising: a first step of heat-treating lithium nickel cobalt aluminum oxide to produce a mixture; a second step of water-washing the mixture produced in the first step to obtain a residue; and a third step of heat-treating the residue obtained in the second step.

The present disclosure relates to the production of lithium-enriched compositions from lithium-ion batteries, and the processing of those compositions for the economic recovery of lithium compounds useful for commercial and industrial applications.

Integrated recycling method and processes including recycling spent catalyst to produce one or more water-soluble metal salts and one or more water-insoluble tail byproducts, and recycling rechargeable batteries to produce one or more battery-grade metals and one or more pure metallic byproducts, wherein the water insoluble tail byproduct is a feedstock in recycling the rechargeable batteries, the impure metallic byproduct is a feedstock in recycling the spent catalyst, or both.

The present invention provides a method for treating at least one lithium ion battery enclosed in a housing containing aluminum, comprising heating the lithium ion battery using a combustion furnace in which a combustion object is incinerated by flames, while preventing the flames from being directly applied to the housing of the lithium ion battery.

The present invention provides a method for treating at least one lithium ion battery enclosed in a housing containing aluminum, comprising heating the lithium ion battery using a combustion furnace in which a combustion object is incinerated by flames, while preventing the flames from being directly applied to the housing of the lithium ion battery.

Provided is a smelting method in which, for example, a metal oxide such as a nickel oxide ore including nickel oxide is used as a source material and is reduced with a carbonaceous reducing agent to obtain a reduced product, with which method efficient processing can be achieved. This metal oxide smelting method is, for example, a nickel oxide ore smelting method. Specifically, the method includes a reduction process step S3 that has: a drying step S31 in which a mixture that was obtained by mixing a metal oxide and a carbonaceous reducing agent is dried; a preheating step S32 in which the dried mixture is preheated; a reduction step S33 in which the preheated mixture is reduced using a rotary hearth furnace 1, a hearth of which rotates; and a cooling step S35 in which the obtained reduced product is cooled.

Provided is a smelting method in which, for example, a metal oxide such as a nickel oxide ore including nickel oxide is used as a source material and is reduced with a carbonaceous reducing agent to obtain a reduced product, with which method efficient processing can be achieved. This metal oxide smelting method is, for example, a nickel oxide ore smelting method. Specifically, the method includes a reduction process step that has: a drying step in which a mixture that was obtained by mixing a metal oxide and a carbonaceous reducing agent is dried; a preheating step in which the dried mixture is preheated; a reduction step in which the preheated mixture is reduced using a rotary hearth furnace, said rotary hearth having a hearth that rotates and not having a partition structure in an interior; and a cooling step in which the obtained reduced product is cooled.

A treatment method of scrapped positive electrode slurry, includes the following steps: pretreating the scrapped positive electrode slurry to obtain a slurry solution; performing electrophoresis coagulation and filter pressing on the slurry solution to obtain a liquid phase and a solid phase; and performing gradient roasting on the solid phase to obtain a positive electrode material.

A method capable of inexpensively recovering valuable metals is provided. The method for recovering a valuable metal includes: a preparation step of preparing a charge containing at least lithium (Li) and a valuable metal; an oxidation and reductive melting step of subjecting the charge to an oxidation treatment and a reductive melting treatment to produce a reduced product containing a molten alloy and a slag, the molten alloy containing the valuable metal; and a slag separation step of separating the slag from the reduced product to recover the molten alloy, in which the mole ratio of lithium (Li) to aluminum (Al) (Li/Al ratio) in the slag is 0.15 or more and less than 0.40, and the mole ratio of calcium (Ca) to aluminum (Al) (Ca/Al) in the slag is 0.15 or more.