Leaching of Ti and V from the non‐magnetic fraction of ilmenite‐based ore: Kinetic and thermodynamic modelling

Abstract

A source of Ti and V found in Brazil contains important content of both elements and has not been explored yet. Such resources would supply the demand for the battery market (Li‐ion and redox flow), robotics, unmanned aerial vehicles, and 3D printers. The hydrometallurgical route is essential to obtain different high purity products. The goal of the present work was to study the HCl leaching of Ti and V from the non‐magnetic fraction of ilmenite‐based ore. The effects of solid–liquid ratio, NaHF2, Fe0, and chloride ions were evaluated. The optimized conditions were the solid–liquid ratio of 1/6–1/12 and NaHF2 of 10 wt.% for 4 h under reducing leaching. Kinetic modelling fitted better for the chemical reaction model. The activation energy was 14.5, 15.4, and 15.5 J/mol for Ti, V, and Fe, respectively. No improvement was obtained as the concentration of chloride ions increased.

Acid Leaching Extraction Mechanism of Aluminum and Iron Ions from Coal Gangue Based on CaF2 Assistance and Process Optimization

“…Therefore, efficiently extracting aluminum and iron ions from the gangue is essential. Aguiar, E. et al found that HF can extract the leaching ratio of metal ions, such as titanium, due to its ability to dissolve silica [ 28 ]. However, their study did not discuss the reaction between fluoride and silicon ions, nor did it discuss the influence of holes formed by silicon ions on the leaching rate of metal ions.…”