Title:
METHOD FOR PRODUCING REDUCED IRON USING WET DUST OF BLAST FURNACE AND METHOD FOR PRODUCING CRUDE ZINC OXIDE
Document Type and Number:
Japanese Patent JP3723521
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a method for producing a reduced iron with which the collapse and the powdering of a pellet in the heating furnace is produced and the product reduced iron having high dezincificating rate and high metallizing rate can be produced at a high yield when the pellet containing wet dust of blast furnace is heated and reduced in the heating furnace to obtain the reduced iron.
SOLUTION: The additional ratio of the other powdery raw material containing iron oxide and/or carbon into the wet dust of the blast furnace, is adjusted and mixed raw material is prepared so that an excessive carbon rate SC satisfies the formula: Sc≤8-2NL+0.02YD. Wherein, SC=XC-(12/16)XO, NL: average number of layers of the pellet laid on the furnace hearth, YD =100XC'B/XC. Then, XC: mass% of carbon in the pellet, XO: total mass% of oxygen in the iron oxide and zinc oxide in the pellet, XC'B: mass% of carbon contained in the other powdery raw material in the pellet.
Inventors:
Goji Maki
Yoshiyuki Matsui
Takehiro Sugiyama
Takao Harada
Yoshihiko Tetsumoto
Hiroshi Tamazawa
Yoshiyuki Matsui
Takehiro Sugiyama
Takao Harada
Yoshihiko Tetsumoto
Hiroshi Tamazawa
Application Number:
JP2002101667A
Publication Date:
December 07, 2005
Filing Date:
April 03, 2002
Export Citation:
Assignee:
KABUSHIKI KAISHA KOBE SEIKO SHO
International Classes:
C22B1/16; C21B13/10; C22B19/34; (IPC1-7): C21B13/10; C22B1/16; C22B19/34
Domestic Patent References:
| JP11241125A | ||||
| JP2001032005A |
Attorney, Agent or Firm:
Yoshiyuki Kaji
Makoto Suhara
Makoto Suhara
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