Separation of Iron and Calcium from a BSSF Steelmaking Slag Through Acid Leaching

Considering the BSSF steelmaking slag generated in a Brazilian steelwork, it would be worth to separate iron and calcium from it, with objective of increasing its content, or producing Fe2O3 CaO by selective precipitation cations aqueous solution. In this way, materials could produced used in-house, e.g., sintering plant. This possibility was explored through acid leaching for an industrial sample. A increase concentration is leach 2 mol.L-1 HCl solution; condition, 63.6% extracted solution, Fe content increases 27.4 37.1 wt%. Another use 5 mol.L-1; 86.8% 90.7% are transferred liquid Then separation can achieved precipitation: firstly, adding ammonia precipitate Fe(OH)3, then calcinating produce (~ 200 °C); following, sodium carbonate CaCO3, which turn calcinated 900 °C). produced.