Process for treatment of dust from steelworks

The invention concerns a method for treating steel works dust in order to recuperate elements capable of being upgraded, said method comprising an attrition in water followed by hydraulic grading of the resulting load. Said method is characterised in that it further comprises: a washing step to separate the water soluble saline fractions of the insoluble oxides; hot treatment to eliminate metals in the form of free oxides such as zinc and lead; treatment by heating at a temperature ranging between 240 and 800 DEG C; treatment with sulphuric acid having a concentration between 5 and 8 %.