(19)
(11) EP 1 524 322 A8

(12) CORRECTED EUROPEAN PATENT APPLICATION

(48) Corrigendum issued on:
27.07.2005 Bulletin 2005/30

(43) Date of publication:
20.04.2005 Bulletin 2005/16

(21) Application number: 04008654.8

(22) Date of filing: 08.04.2004
(51) International Patent Classification (IPC)7: C21C 5/36, C21C 7/00
(84) Designated Contracting States:
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PL PT RO SE SI SK TR
Designated Extension States:
AL HR LT LV MK

(30) Priority: 15.10.2003 CZ 20032815
24.11.2003 CZ 20033207

(71) Applicants:
  • Adelt, Milan
    27201 Kladno (CZ)
  • Raclavsky, Milan
    70800 Ostrava-Poruba (CZ)
  • Moulis, Vlastimil
    33843 Mirosov (CZ)
  • Gora, Pavel
    73961 Trinec (CZ)
  • Leitner, Ekhard
    1090 Vienna (AT)

(72) Inventors:
  • Adelt, Milan
    27201 Kladno (CZ)
  • Raclavsky, Milan
    70800 Ostrava-Poruba (CZ)
  • Moulis, Vlastimil
    33843 Mirosov (CZ)
  • Gora, Pavel
    73961 Trinec (CZ)
  • Leitner, Ekhard
    1090 Vienna (AT)

(74) Representative: Plicka, Josef 
Cermak, Horejs, Myslil a Spol. Narodni 32
110 00 Praha 1
110 00 Praha 1 (CZ)

   


(54) Method of liquid steel production with slag recycling in a converter, equipment to employ the method


(57) The invented method consists of the fact that slag from the end of a steelmaking process in a converter is recycled at the beginning of the steel converter process. Once the silicon oxidises, the slag is removed and substituted with new slag made of lime in particular as well as other admixtures, as the case may be. It means that the slag is not removed at the end of the steelmaking process, but in the middle of it. This decreases the amount of the slag due to better utilisation of the refining capacity of the slag and due to a smaller content of iron oxides while preserving desired characteristics of the metal. Application of the process thus increases metal yields. Auxiliary equipment makes slag-off easier.