Title:
PRODUCTION OF MOLTEN PIG IRON CONTAINING CHROMIUM AND/OR NICKEL
Document Type and Number:
Japanese Patent JP3603969
Kind Code:
B2
Abstract:
PURPOSE: To secure the stability of operation, such as furnace body protection of smelting furnace, improvement in yield, and prevention of spitting, in the smelting reduction of Cr oxides and/or Ni oxides.
CONSTITUTION: At least a raw material, containing chromium oxides and/or nickel oxides, and a carbon material are supplied into a smelting furnace, and this raw material is melted by supplying oxidizing gas into the smelting furnace to undergo smelting reduction, thereby, a molten pig iron containing chromium and/or nickel is produced. At this time, a flux is added in its early stages of blowing, and MgO content in this flux is lower by 1-15wt.% than the saturation solubility at the smelting reduction operating temp., and further, the melting point of this flux is not higher than the smelting reduction operation temp. Further, if necessary, a flux having a composition equal to that of blast furnace slag is used as the flux.
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Inventors:
Hideo Nakamura
Shigeru Inoue
Atsushi Watanabe
Hisaki Kato
Haruyoshi Tanabe
Shigeru Inoue
Atsushi Watanabe
Hisaki Kato
Haruyoshi Tanabe
Application Number:
JP18635794A
Publication Date:
December 22, 2004
Filing Date:
July 15, 1994
Export Citation:
Assignee:
jfe Steel Corporation
International Classes:
C22B23/00; C21B11/00; C21B13/00; C21C5/28; C22B34/30; (IPC1-7): C21C5/28; C21B11/00; C21B13/00; C22B23/00; C22B34/30
Domestic Patent References:
| JP61279608A | ||||
| JP1104707A |
Attorney, Agent or Firm:
Yasuo Ishikawa