Chemical and Mineralogical Characterizations of High Ti-Bearing Blast Furnace Slag in Panzhihua, China

Chemical and mineralogical characterizations of high Ti-bearing blast furnace slag in Panzhihua region, Sichuan province, China, were investigated, and the technical approach “recycling Fe by magnetic separation-extracting Al and Mg by sulfation roasting and water leaching-extracting Ti by acidolysis” was proposed for recycling the valuable elements from the special mineral resources. The results show that the most valuable metal is Ti (20.46 % TiO₂, mass fraction). Other metals, such as Al, Mg, and Fe, can also be seen as valuable components to be recovered. Minerals such as perovskite, diopside, and spinel are disseminated in the slag. The Ti element in the slag is distributed widely in many types of mineral phases and Ti component enriches mainly in perovskite phase. It is highly euhedral and mostly disseminates in the diopside, it usually presents an equiaxed or irregular granular shape, and particles are commonly tiny.