Abstract
Silico-manganese sludges are a waste resulting from the ferroalloy industry, more precisely from the manufacture of silico-manganese. From a technological point of view, they come from the sludge resulting from the filtration of furnace gases. From a chemical point of view, they are made up of a large number of combinations of manganese and silicon. The manganese content varies widely between 5-35% MnO. Due to the fact as there are limitations for the manganese content in waters and soils, the presence of these sludge deposits constitutes a permanent risk of environmental contamination. In addition to the definitive closure (greening) of the deposit, there is also the possibility of valorizing this waste. The present paper presents the preliminary research carried out to identify a sustainable technology for the recovery of useful elements from the sludge.