Abstract
Vanadiferous titanomagnetite deposits are a major resource for processes dedicated to vanadium extraction. Depending on the mineralogical characteristics and the developed unit operations, a titanium bearing waste is produced in mineral processing. The present manuscript deals with the development of an alternative to beneficiate this material to increase the titanium levels and, as consequence, conferring the material an improved composition that might have better acceptance on the market. It seems that a broad thermodynamics simulation regarding the typical roasting methods (e.g., based on sulfates, carbonates, and hydroxides) is scarce, the major contribution is on the development of a systematic approach for process design. The manuscript also covers experiments and a detailed characterization of the involved materials by means of Scanning Electron Microscopy as well as X-Ray Diffraction and Fluorescence. With the selection of NaOH as the most promising roasting reagent, with two subsequent leaching extractions, one in water and the other in acid medium; it was possible to concentrate Ti from 15.69 to 39.22 wt%, with perovskite (CaTiO3) as the main carrier of the element of interest, corresponding to 65.23 wt% of the resulting material mineralogical analysis.
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