Per: Fábio de são josé (centro federal de educação tecnológica de minas gerais - unidade araxá), kennedy da silva ramos (universidade federal do ceará - unidade crateús), carlos alberto pereira (universidade federal de ouro preto), sérgio eduardo de Almeida lima (Programa de pós-graduação em engenharia de minas)
Abstract:
Manganese concentrates are important for various industries. It is the important raw material for steel and ferromanganese productions, dry batteries and other products. The scarcity of manganese ore with a high content (> 40% Mn) and adequate granulometry that allows its use as granulate induces several studies that looking for to evaluation of the possibilities to concentrating low content and fine manganese ores. The new reality of the available deposits, the importance of manganese for the basic industry (example of the steel industry) is maintained and leads us to characterize and treat the low ores in metal manganese (gondite), especially in the comminution and concentration steps. Thus, the work aimed at the search for initial data useful to characterize the gondite, to define the ore WI and to carry out an exploratory phase of concentration through magnetic technology. As a result, were obtained a WI equal to 13.7 kWh/t, close value for low manganese ores, magnetic concentration with field at 12,000 Gauss that allowed metallurgical recovery of up to 92.48% with 22.84% of content, and therefore, its use as possible, despite the lack of data on cost-benefit of the process.