Análise da escória de conversor do processo Baosteel Slag Short Flow (BSSF) por espectroscopia Mössbauer

Abstract

Industrial processes basically produce everything that ground modern life as we know it today and it’s known that industries strongly affect the environment, whether by a raw material extraction or by a company that manufactures and treat fineshed products, the environment is directly affected during all industrial stages, as it is not a natural or spontaneous process, but an alteration of nature in favor of social development. The converter slag from the Baosteel Slag Short Flow (BSSF) process is a large volume by-product of siderurgy in which there is no desire of finding metallic iron, therefore it must be treated. Thus, the present work made use of Mössbauer spectroscopy chemical analysis with a radioactive source of cobalt (Co 27 protons and 57 mass) , both in BSSF slag sample and conventional slag sample by way of comparing the two, and 3 distinct signs were found for each sample after results refinement by Normos software with 95% of precision in it’s calculations, indicating the presence of isotopes of pure iron (Fe 27 protons and 57 mass) in both samples. To each Lorentzian was attributed a mineral compound based on the cross-data references in the scientific literature and based on complementary chemical analysis such as X-Ray Fluorescence (XRF) and X-Ray Diffraction (XRD), allowing to confirm a couple of common mineral phases, such as wustite and magnetite, in addition to a couple of not so common mineral phases, being srebrodolskite and goethite. In conclusion, the Mössbauer spectroscopy analysis provides very important information about the iron ions and makes possible to differentiate mineral phases that aren’t detected in other types of chemical analysis due to it’s subtle chemical nuances between each mineral.