Manhique, A.J. (Arao Joao)Focke, Walter WilhelmMadivate, Carvalho2012-09-192012-09-192011-10Arao J. Manhique, Walter W. Focke & Carvalho Madivate, Titania recovery from low-grade titanoferrous minerals, Hydrometallurgy, vol. 109, no. 3-4, pp. 230-236 (2011), doi: 10.1016/j.hydromet.2011.07.0080304-386X (print)1879-1158 (online)10.1016/j.hydromet.2011.07.008http://hdl.handle.net/2263/19812In this study a novel process for extraction of titanium valuables from its minerals is presented. The process entails roasting of titanium ore with alkaline metal salt, hydrolysing fused cake and dissolution in acid. Optimum conditions were found to be 1 h fusion at 850 °C, using 2:1 mole ratio, NaOH:FeTiO4, irrespective of the particle size interval used in this work. It was found that under these conditions ≈80% of titanium was recovered. Na0.75Fe0.75Ti0.25O2, NaFeTiO4 and Na2Fe2Ti3O10 were the dominant phases at this temperature. The presence of these phases is viewed as beneficial to the economics of the process, it consumes less NaOH. Fusions conducted at 550 °C or below produced chiefly binary phases, Na2TiO3 and NaFeO4, reducing process economy. Optimum leaching conditions were S/L=0.26, leaching at 75 °C, for 15 min. 85% of NaOH was recovered, under these conditions. Leaching obeys shrinking core mechanism model.en© 2011 Elsevier. All rights reserved. Notice : this is the author’s version of a work that was accepted for publication in Hydrometallurgy. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Hydrometallurgy, vol 109, issue 3-4, October 2011, doi: 10.1016/j.hydromet.2011.07.008.IlmeniteTitaniaAlkali fusionPostprint Article