TITANIA-CONTAINING SLAG PROCESSING METHOD Russian patent published in 2007 - IPC C22B34/12 C22B7/04 C22B4/06 

FIELD: metallurgy.

SUBSTANCE: titania-containing blast-furnace slag processing comprises melting metallic substrate in melting chamber of melting unit, making substrate rotate by means of electromagnetic field generated by MHD-device of melting unit, forming parabolically shaped recess in the substrate, adding a portion of slag into recess, melting slag by electromagnetic energy transmitted to the slag through substrate, reducing metals, and melting them together with substrate metal. Reduction of titanium and other metals from their oxides having free energy lower than that of aluminum is effected in molten portions of slag with aluminum or ferroaluminum. These reduced metals contribute to metallic substrate. Thereupon, a fresh portion of slag is introduced into melting unit and titanium incorporated in the substrate reduces metals from their oxides contained in the fresh slag portion and having free energy lower than that of titanium. Titanium-reduced metals are melted together with metallic substrate and a predetermined amount thereof is poured out. The rest of metallic substrate is replenished with titanium reduced from slag phase with aluminum. Titanium-containing alloy is poured out from melting chamber in predetermined amount, after which, keeping alloy remaining in chamber rotating, all processed slag is discharged. After the notch is closed, rotation of the rest of alloy is stopped, metal plug is formed in the notch, and a fresh portion of slag is supplied in controlled mode while gradually forcing liquid metallic substrate to rotate in order to form parabolically shaped recess therein. From molten portion of slag, a portion of silicon is then reduced with titanium, after which all operations are repeated.

EFFECT: reduced power consumption and simplified process due to avoided need in cumbrous equipment for removal and treatment of gas.

6 cl, 1 dwg