| Texto completo | |
| Autor(es): |
Dias, Maria Eduarda de Melo Golcalves
;
Tenorio, Jorge Alberto Soares
;
Espinosa, Denise Crocce Romano
;
Botelho Junior, Amilton Barbosa
Número total de Autores: 4
|
| Tipo de documento: | Artigo Científico |
| Fonte: | JOM; v. N/A, p. 12-pg., 2025-08-25. |
| Resumo | |
In this study, we aimed to study acid leaching and solvent extraction for recycling of NMC-type batteries (622-pouch; 631-prismatic). Physical structures have no impact on our physical process (milling and sieving). In acid leaching, the addition of reducing agents was unnecessary because of the presence of Al foil. Up to 30% of acid excess is required for complete cathode material leaching, a crucial process conclusion that varies with different black mass compositions. This calculation was made based on the amount of metals in the black mass per acid. Al and Cu were removed by precipitation. In solvent extraction experiments, Cyanex 272 has higher selectivity than D2EHPA and separates 100% of Mn/Co with the co-extraction of Li/Ni (20%). Products of the process were Mn oxide, Ni hydroxide, and Li carbonate. We clearly observed that precipitation of Mn before solvent extraction steps is necessary for Co recovery from the recycling of NMC batteries because of the co-extraction and subsequent losses of Co, as clearly illustrated in the process flowchart. Our conclusions are in accordance with previous studies reported in the literature. Separation of metals in the leach solution has higher efficiencies without the presence of Mn ions (in NCA-type processing or after Mn removal by ozone). In the presence of Mn in the leach solution, low recovery efficiencies were obtained for Li (48.0%), Ni (62.8%), and Co (58.6%). Our conclusions and aim are to demonstrate that traditional approaches from extractive metallurgy are not suitable for the ongoing challenge in recycling and waste valorization. (AU) | |
| Processo FAPESP: | 20/00493-0 - Mineração sustentável: recuperação de matérias-primas críticas de baterias usando tecnologias ambientalmente amigáveis |
| Beneficiário: | Jorge Alberto Soares Tenório |
| Modalidade de apoio: | Auxílio à Pesquisa - Regular |
| Processo FAPESP: | 23/01032-5 - Separação de metais críticos através de membranas suportadas com líquidos: avaliação da interação sinérgica entre organofosforados e membranas |
| Beneficiário: | Amilton Barbosa Botelho Junior |
| Modalidade de apoio: | Bolsas no Exterior - Estágio de Pesquisa - Pós-Doutorado |
| Processo FAPESP: | 21/14842-0 - Elucidação do mecanismo de complexação de organometálicos entre extratantes orgânicos e elementos terras raras |
| Beneficiário: | Amilton Barbosa Botelho Junior |
| Modalidade de apoio: | Bolsas no Brasil - Pós-Doutorado |
| Processo FAPESP: | 19/11866-5 - Desenvolvimento de processos inovadores para recuperação de metais críticos |
| Beneficiário: | Denise Crocce Romano Espinosa |
| Modalidade de apoio: | Auxílio à Pesquisa - Temático |