PROCEDURE FOR STEEL MAKING IN ARC STEEL MELTING FURNACE Russian patent published in 2011 - IPC C21C5/52 

FIELD: metallurgy.

SUBSTANCE: procedure consists in loading charge into furnace, in its heating, smelting, in introduction of magnesian-limestone flux in portions during melting, in refining during furnace operation, and in oxygen blowing. As magnesian-limestone flux there are used granules of bio-ceramic composition. Granules of bio-ceramic composition are introduced at amount facilitating ratio between contents of magnesium oxide in slag and furnace lining (% MgO)_slag / (% MgO)_lining = 0.05-0.16. Additionally there is introduced iron ore till contents of iron oxides in slag in terms of FeO reaches not less, than 12 wt %.

EFFECT: increased resistance of furnace lining and increased degree of phosphorus removal due to correction of slag mode.

2 cl, 1 tbl