Abstract

The paper presents the conversion process from titanium slag to rutile TiO₂ through adopting the process route in the order of “Alkali leaching-Microwave roasting-Acid leaching-Microwave calcination”. The transformations of the slag samples in terms of phase composition, molecular structure, and other changes before and after the process were observed through analytical technics such as XRD, Raman, FI-IR and SEM. The characterization results all showed that the series of process treatment not only converted the phase of high-titanium slag from the black rock into rutile TiO₂, but also significantly reduced impurities, with the improved rutile TiO₂ grade meets the production standards of titanium dioxide using the chlorination process. The work highlights that the combined process of microwave heating and acid-alkali joint leaching is a potential and productive approach for preparing artificial rutile TiO₂ from titanium slag.