CHARGE PREPARATION FOR STEEL MAKING Russian patent published in 1997 - IPC

FIELD: nonferrous metallurgy. SUBSTANCE: charge preparation for steel making additionally has material including calcium oxide with the following amount of components, mas.%: iron ore pellets 5-35; material including calcium oxide 5-35; the balance cast iron. Charge preparation in the capacity of material including calcium oxide has sinter and pure calcium oxide with the following amount of components, mas.%: iron ore pellets 5-35; sinter 3-20; pure calcium oxide 2-15; the balance, cast iron. Sinter in charge preparation has the following chemical composition, %: Fe, 46.0-58.0; FeO, 9.7-24.6; SiO₂, 5.2-12.1; CaO, 6.3-14.3; Al₂O₃, 0.9-2.9; MgO, 0.5-2.8; MnO, 0.13-2.2; S, 0.014-1.07; with basicity = 0.94-2.01. EFFECT: higher efficiency. 4 cl, 1 tbl