Extraction of Critical Metals from Secondary Source: Leaching Ti and V from Brazilian Fe-Ti-V Deposit Residue

Author(s)

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

• Document type: Journal article
• Source: JOM; v. 75, n. 5, p. 10-pg., 2023-03-14.

Abstract

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)

• FAPESP's process: 19/11866-5 - Development of innovative processes for the recovery of critical metals
• Grantee: Denise Crocce Romano Espinosa
• Support Opportunities: Research Projects - Thematic Grants
• FAPESP's process: 21/14842-0 - Elucidation of the organometallic complexation mechanism between organic extractants and rare earth elements
• Grantee: Amilton Barbosa Botelho Junior
• Support Opportunities: Scholarships in Brazil - Post-Doctoral
• FAPESP's process: 12/51871-9 - Study Center for Technology in Waste Solid Treatment and Recycling - SCTWSTR
• Grantee: Jorge Alberto Soares Tenório
• Support Opportunities: Research Projects - Thematic Grants