METHOD OF STEEL MELTING IN CONVERTER Russian patent published in 2001 - IPC

FIELD: metallurgy, particularly, steel melting in oxygen steel-making converters. SUBSTANCE: method includes introduction into converter of scrap; pouring of hot metal; blowing of metal with oxygen; addition of lime and slag-forming material in the form of ferruginous lime-magnesian flux in amount of 5-40 kg/t of good steel. Flux is prepared by sintering of finely divided materials containing oxides of calcium, magnesium and iron. 10-80% of flux is introduced into converter charge before supply of oxygen and the rest of flux is introduced before 8-th minute of metal blasting. Flux introduced into converter contains, wt.%: calcium oxide, 45-60; magnesium oxide, 26-35; and iron oxide, 5-15. EFFECT: higher stability of converter lining, improved slag formation in heat, and higher dephosphorization of metal. 2 cl, 1 tbl, 11 ex