Flexible processes and systems for recovering manganese (Mn), cobalt (Co), nickel (Ni) as a purified co-precipitated product or alternatively independent products, from a lithium-ion battery waste stream are provided. The process may include upstream leaching and impurity removal prior to separation in a metal recovery system that may include a manganese (Mn) recovery unit to generate a manganese (Mn)-containing product, a cobalt (Co) recovery unit to generate a cobalt (Co)-containing product or a nickel (Ni) recovery unit to generate a nickel (Ni)-containing product or alternatively and optionally may include a co-precipitator unit to form a co-precipitated product. A lithium (Li) recovery unit may further process a portion of the waste liquid stream to form a lithium (Li)-containing product.

Processes and systems for isolating manganese (Mn), cobalt (Co), nickel (Ni) as a purified co-precipitated product or alternatively independent products, from a lithium-ion battery waste stream like black mass are provided. The process may include processing black mass in an extraction process that comprises mixing the black mass with a source of iron (III) ions and a source of iron (II) ions in an aqueous liquid to extract Mn, Ni, and Co and the at least one impurity element to form a stream, then filtering solids including the graphite and iron hydroxide from the stream that then comprises Mn, Ni, and Co and at least one impurity element. The stream may be further purified by removing the at least one impurity element and Mn, Ni, and Co can be separated from the stream to form one or more recovered products comprising one or more of Mn, Ni, and C0.

Provided herein is a nickel recovering method, comprising: (A-i) a reduction heat treatment process for thermally treating a first raw material containing nickel and lithium; (B) a first leaching process for leaching the heat-treated product produced by the reduction heat treatment process; (A-ii) a roasting process for thermally treating a second raw material containing nickel and sulfur; (C) a second leaching process for leaching the first leaching residue produced by the first leaching process and calcine produced by the roasting process; (D) a neutralization process for neutralizing the second leachate produced by the second leaching process; (E) a purification process for removing impurities contained in the neutralized solution produced by the neutralization process; and (F) a precipitation process of performing a precipitation method to recover nickel from the purified solution produced by the purification process, and a nickel hydroxide is recovered by the precipitation process.

This method for separating cobalt and nickel includes a step (S3) of immersing an electrode material of a lithium ion secondary battery in a treatment liquid containing sulfuric acid and hydrogen peroxide to obtain a leachate, a step (S4) of adding a hydrogen sulfide compound to the leachate to precipitate copper, either one of a first treatment step (S5A) or a second treatment step (S5B), a step (S6) of obtaining a precipitate substance containing cobalt sulfide and nickel sulfide and a residual liquid containing lithium, and a re-dissolution step (S7) of dissolving cobalt and nickel in a suspension obtained by suspending the precipitate substance in distilled water or dilute sulfuric acid, in which, in the re-dissolution step (S7), the suspension is bubbled with an oxidizing gas containing oxygen using a fine-bubble generation apparatus.

Flexible processes and systems for recovering manganese (Mn), cobalt (Co), nickel (Ni) as a purified co-precipitated product or alternatively independent products, from a lithium-ion battery waste stream are provided. The process may include upstream leaching and impurity removal prior to separation in a metal recovery system that may include a manganese (Mn) recovery unit to generate a manganese (Mn)-containing product, a cobalt (Co) recovery unit to generate a cobalt (Co)-containing product or a nickel (Ni) recovery unit to generate a nickel (Ni)-containing product or alternatively and optionally may include a co-precipitator unit to form a co-precipitated product. A lithium (Li) recovery unit may further process a portion of the waste liquid stream to form a lithium (Li)-containing product.

Flexible processes and systems for recovering manganese (Mn), cobalt (Co), nickel (Ni) as a purified co-precipitated product or alternatively independent products, from a lithium-ion battery waste stream are provided. The process may include upstream leaching and impurity removal prior to separation in a metal recovery system that may include a manganese (Mn) recovery unit to generate a manganese (Mn)-containing product, a cobalt (Co) recovery unit to generate a cobalt (Co)-containing product or a nickel (Ni) recovery unit to generate a nickel (Ni)-containing product or alternatively and optionally may include a co-precipitator unit to form a co-precipitated product. A lithium (Li) recovery unit may further process a portion of the waste liquid stream to form a lithium (Li)-containing product.

A method for recovering at least cobalt of valuable metals, cobalt and nickel, from an acidic solution obtained by subjecting waste containing positive electrode materials for lithium ion secondary batteries to a wet process, the acidic solution comprising cobalt ions, nickel ions and impurities, the method including: a first extraction step for Co recovery, the first extraction step being for extracting cobalt ions by solvent extraction from the acidic solution and stripping the cobalt ions; and a second extraction step for Co recovery, the second extraction step being for extracting cobalt ions by solvent extraction from a stripped solution obtained in the first extraction step for Co recovery and stripping the cobalt ions, wherein the first extraction step for Co recovery includes: a solvent extraction process for extracting cobalt ions in the acidic solution into a solvent; a scrubbing process for scrubbing the solvent that has extracted the cobalt ions; and a stripping process for stripping the cobalt ions in the solvent after the scrubbing into a solution.

Flexible processes and systems for recovering manganese (Mn), cobalt (Co), nickel (Ni) as a purified co-precipitated product or alternatively independent products, from a lithium-ion battery waste stream are provided. The process may include upstream leaching and impurity removal prior to separation in a metal recovery system that may include a manganese (Mn) recovery unit to generate a manganese (Mn)-containing product, a cobalt (Co) recovery unit to generate a cobalt (Co)-containing product or a nickel (Ni) recovery unit to generate a nickel (Ni)-containing product or alternatively and optionally may include a co-precipitator unit to form a co-precipitated product. A lithium (Li) recovery unit may further process a portion of the waste liquid stream to form a lithium (Li)-containing product.

Provided herein is a nickel recovering method, comprising: (A-i) a reduction heat treatment process for thermally treating a first raw material containing nickel and lithium; (B) a first leaching process for leaching the heat-treated product produced by the reduction heat treatment process; (A-ii) a roasting process for thermally treating a second raw material containing nickel and sulfur; (C) a second leaching process for leaching the first leaching residue produced by the first leaching process and calcine produced by the roasting process; (D) a neutralization process for neutralizing the second leachate produced by the second leaching process; (E) a purification process for removing impurities contained in the neutralized solution produced by the neutralization process; and (F) a reduction process for performing a hydrogen reduction method on the purified solution produced by the purification process to recover nickel from the purified solution.

Provided herein is a nickel recovering method, comprising: (A-i) a reduction heat treatment process for thermally treating a first raw material containing nickel and lithium; (B) a first leaching process for leaching the heat-treated product produced by the reduction heat treatment process; (A-ii) a roasting process for thermally treating a second raw material containing nickel and sulfur; (C) a second leaching process for leaching the first leaching residue produced by the first leaching process and calcine produced by the roasting process; (D) a neutralization process for neutralizing the second leachate produced by the second leaching process; (E) a purification process for removing impurities contained in the neutralized solution produced by the neutralization process; and (F) a precipitation process of performing a precipitation method to recover nickel from the purified solution produced by the purification process, and a nickel hydroxide is recovered by the precipitation process.