EXTRACTION METHOD OF METALLIC ELEMENT, PARTICULARLY METALLIC CHROMIUM, FROM CHARGE CONTAINING METAL OXIDES IN ARC FURNACE Russian patent published in 2009 - IPC C22C33/04 C21C5/28 C21C7/00 

FIELD: metallurgy.

SUBSTANCE: invention relates to extraction method of metallic elements, particularly, metallic chromium from slag, which contains oxides, particularly chrome oxide, in arc furnace. Additionally slag is not reduced at separated stage after melting, but there are implemented following stages: after charge introduction into arc furnace it is melted, forming molten metal and slag. Melt is discharged, keeping unreduced slag in furnace. Then it is fed following scrap portion, including reducers for slug. At melting of this charge slag is reduced. Then slag and melt are merged. Method can be used also in aggregates of ladle or convertermetallurgy.

EFFECT: reduction of melt handling total time for 15 minutes, reduction of ferrosilicon consumption and slag-forming consumption, life time increasing of furnace hearthstone and life time ladle plugs, improving of arc furnace energy balance.

7 cl, 1 dwg