University of Tehran International Journal of Mining and Geo-Engineering 2345-6930 53 2 2019 10 13 A Study on the Recovery of Titanium Dioxide from a Blast Furnace Slag, Using Roasting and Acid Leaching 175 181 73083 10.22059/ijmge.2018.264394.594756 EN Mohsen Fattahpour School of Mining, College of Engineering, University of Tehran, Tehran 1439957131, Iran 0000-0001-6723-2066 Mohammad Noaparast Schoolf of Mining Engineering, College of Engineering, University of Tehran Ziaedine Shafaei School of Mining, College of Engineering, University of Tehran Golnaz Jozanikohan Assistant Professor, Ph.D in Mining Engineering (Mineral Exploration), School of Mining Engineering, College of Engineering, University of Tehran, Tehran, Iran 0000-0002-5920-0424 Mehdi Gharabaghi ut Journal Article 2018 08 25 In this research, parameters affecting the recovery of titanium dioxide from Iron slag sample collected from Esfahan Steel Company, located in Esfahan province, Iran, were studied. Roasting with sodium carbonate followed by sulfuric acid leaching was used in this study. The best condition for roasting with sodium carbonate was obtained at the temperature of 500oC with Na2CO3/slag ratio of 1/4, and in 120 minutes. The optimum condition for titanium dioxide recovery from iron blast furnace slag was achieved at temperature of 85oC, Solid/Liquid ratio of 1/15, sulfuric acid concentration of 2 M in 240 minutes time, for -106µm sized sample. The maximum recovery was 53%. The kinetic study showed that the leaching process was controlled by the diffusion, in which the activation energy was 5.85kJ/mol which confirmed the diffusion control of the process. https://ijmge.ut.ac.ir/article_73083_12257422f1d211393e6e698e58c38243.pdf