PROCESSO DI TRATTAMENTO E VALORIZZAZIONE DELLA SCORIA BIANCA

The present invention relates to a process for treating ladle furnace slag ("white slag") deriving from the refining of steel inside a ladle, said process comprising the following steps: a) adding metallic aluminum to a mixture comprising ladle furnace slag and steel inside said ladle, said mixture being at a temperature between 1400°C and 1700°C and comprising steel in an amount between 25% and 35% by weight and ladle furnace slag in an amount between 65% and 75% by weight; b) mixing the mixture obtained during step a) inside said ladle, obtaining a ferrosilicon alloy and calcium aluminate; c) separating the ferrosilicon alloy and the calcium aluminate thus obtained, wherein the ladle furnace slag comprises silica (SiO2), and wherein during said step a) the metallic aluminum is added in such an amount as to react with at least 75% of the silica contained in the ladle furnace slag.