| Texto completo | |
| Autor(es): |
Domingos, Ana Eluiza Esther da Cunha
;
Botelho Junior, Amilton Barbosa
;
Duarte, Heitor Augusto
;
Tenorio, Jorge Alberto Soares
;
Espinosa, Denise Crocce Romano
;
Baltazar, Marcela dos Passos Galluzzi
Número total de Autores: 6
|
| Tipo de documento: | Artigo Científico |
| Fonte: | JOM; v. 75, n. 5, p. 10-pg., 2023-03-14. |
| Resumo | |
The growing demand for critical metals to supply the market has led to searches for new sources crucial to technological development. The present study aimed to leach Ti and V from the non-magnetic fraction of a non-oxidized Brazilian Fe-Ti-V deposit. Leaching experiments were carried out with HCl, and the effect of the solid-liquid ratio, time, temperature, acid concentration, and NaHF2 and Fe-0 additions were evaluated. The extraction of Ti and V achieved 88.1% and 82.0%, respectively, using 30%HCl, solid-liquid ratio 1/6, and NaHF2 dosage 10% w/w at 85 degrees C. Reducing leaching increased the yield to 95.1% and 91.4%, respectively. Kinetic modeling showed that the leaching of V fitted better for diffusion control through the fluid film, and Ti fitted better for solid product diffusion control. The hydrolysis step separated 98.5% of Ti in the solid phase with losses of Fe (9.5%) and V (5.7%). Therefore, the hydrometallurgical route designed is simple, and it is possible to obtain high-purity products. (AU) | |
| 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 |
| 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: | 12/51871-9 - Estudo de novas tecnologias e rotas de processamento para o tratamento e reciclagem de resíduos sólidos |
| Beneficiário: | Jorge Alberto Soares Tenório |
| Modalidade de apoio: | Auxílio à Pesquisa - Temático |