FIELD: metallurgy. SUBSTANCE: plant 24 to win iron melt, steel melt in particular, such as refined steel is equipped with vessel 1 of electric-arc furnace, vessel 3 for remelt located behind vessel 1 of electric-arc furnace and linked with it by trough 34 which changes to bottom of remelt vessel due to partial downward inclination. Vessel 3 has oxygen supplying device 35, 36, tap 41 for iron melt positioned close to its end most distant from electric-arc furnace. Plant also has filtering-off vessel 2 placed behind vessel 1 of electric-arc furnace and having common bottom with it. Vessel 2 has slag tap 43 situated by its end most distant from vessel 1 of electric-arc furnace, device 21 feeding liquid pig iron 20 and opening to vessel 1 of electric-arc furnace, stack 5 of preliminary heating to feed hard iron carriers 7. Stack of preliminary heating is located above vessel 1 and opens to vessel 1 through its lid 4 and gas-penetrable cooling and isolating device 6, to loading stack 10 located above vessel 1 of electric-arc furnace that opens to vessel 1 with the use of gas-impenetrable cooling and isolating device 11. Process of winning of iron melt includes loading of 20-70% of liquid pig iron of total amount of loaded iron carriers into vessel 1 of electric-arc furnace, loading of preheated scrap and hard lump iron carriers containing part of iron oxide, for instance, sponge iron, ore reduced in advance, compacted dust, etc. Iron melt flowing through vessel 3 for remelt is subjected to uninterrupted remelting and simultaneous heating in vessels 1 and 3. Slag flowing in direction opposite to melt flow is continuously reduced with regard to its FeO component and cooled simultaneously. EFFECT: efficient processing of various iron carriers in varying quantitative compositions. 22 cl, 6 dwg, 1 tbl
Authors
Dates
2000-03-27—Published
1996-04-09—Filed