METHOD FOR RECOVERING METALLIC ELEMENTS, ESPECIALLY METALLIC CHROMIUM, FROM SLAG CONTAINING METAL OXIDES IN AN ELECTRIC-ARC FURNACE

摘要

The invention relates to a method for recovering metallic elements, especially metallic chromium, from slag containing oxides, especially chromium oxides, in an electric-arc furnace. According to said method, the slag is not reduced in a separate step after melting, but the following steps are carried out: a charge is introduced into the electric-arc furnace, and melted, forming a molten metal and slag; said molten metal is tapped off, leaving the unreduced slag in the furnace vessel; a further charge of scrap metal including reducing agents for the slag is added; the slag is reduced during the melting of said charge; and the slag and the molten metal are then tapped off. The inventive method can also be used in ladle metallurgy or converter metallurgy.