Análise da relação de influência entre o tipo de mineralização de grafita da província Bahia-Minas e sua caracterização mineralógica

Abstract

The graphite has been increasing prominence due to its diverse chemical and physical properties. These characteristics make it a key raw material for the industry and its energy transition. With the Bahia-Minas Graphite Province hosting the most significant Brazilian occurrences, knowledge based on mineralogical characterization makes it possible to assess the standards in relation to mineralogy, chemical content, particle size distribution, among other relevant parameters for ore treatment stages. In this way, this work develops one characterization study for two types of ore in the region. It was observed that Graphite-Gneiss tends to have larger flakes and a more homogeneous distribution in coarser grain size fractions compared to Graphite-Shale. In addition, the characterization of the mineral phases that compose these ores shows that the mineralization of Graphite-Gneiss occurred in a regime of higher metamorphic grade (granulite), while graphite-shale occurred in a lower regime (amphibolite).