Artículos de revistas
Characterization of mixed waste of granite and LD slag
Fecha
2011Registro en:
Rem: Revista Escola de Minas, v.64, n.2, p.169-174, 2011
0370-4467
Autor
PINTO JUNIOR, Luiz Alberto Baptista
VIEIRA, Estefano Aparecido
TENORIO, Jorge Alberto Soares
PEIXOTO, Ricardo Andre Fiorotti
OLIVEIRA, Jose Roberto de
Institución
Resumen
This study focuses on the technical feasibility of the utilization of waste from the cutting of granite to adjust the chemical composition of slag from steelworks LD, targeting the addition of clinker Portland cement. For this, chemical characterization of the waste, its mixture and fusion was performed, obtaining a CaO/SiO(2) relationship of around 0.9 to 1.2 for the steelworks slag. We selected samples of the waste, mixed, melted and cooled in water and in the oven. Samples cooled in water, after examining with X-ray difractrograms, had been predominantly amorphous. For samples cooled in the furnace, which had vitreous, there was the presence of mineralogical phases Akermanita and Gehlenita, which is considered as the ideal stage for the mineral water activity of the slag. The adjustment of the chemical composition of the slag from steel works by the addition of waste granite was efficient, transforming the waste into a product that is the same as blast furnace slag and can be used in the manufacture of cement.