Per: João Pedro Martins Mau (Universidade federal de ouro preto - ufop), Paôlla de carvalho barbosa (UNIVERSIDADE FEDERAL DE OURO PRETO - UFOP), Érica linhasres reis (UNIVERSIDADE FEDERAL DE OURO PRETO - UFOP), anderson silveira lopes (granha ligas)
Abstract:
The mineralogical characterization can support parameters definitions, which enable the metallurgical behavior predictability, assisting on results stability and maintenance of production performance. In this paper, was developed mineralogical characterization research about a manganese ore from of mining located in São João Del Rey-MG iron-manganese district. For this, were realized mineralogical analysis by X-Ray Diffraction, optical microscopy and scanning electron microscope attached with Energy-dispersive X-ray spectroscopy, supported by chemical analysis. The XRD analisys indicate the presence of minerals Spessartine, quartz, pyrolusite and todorokite, as majority minerals. The optical microscopy analysis jointly with the SEM-EDS analysis indicate the presence of Bixbyite and cryptomelane, besides confirm the presence of majority minerals founding in XDR analyze. The occurrence of mineral bixbyite may cause a low Mn/Fe relation, due to presence of Iron in its chemical structure. The existence of element potassium is relating to minerals cryptomelane and todorokite, high grade of this element may increase the Boudouard reactions, result in an energy and Carbon consumption enhance. The presence of pyrolusite favors exothermic reactions on the electric furnace. The high grade of spessartine may be adverse, due to existence of Al and Si elements in its structure, these elements increase the slag volume, as well interfere in the meltdown and flow slag.