Title:
MELT REDUCTION EQUIPMENT AND OPERATING METHOD
Document Type and Number:
WIPO Patent Application WO/1997/027336
Kind Code:
A1
Abstract:
Melt reduction equipment for directly producing a molten iron or a molten pig iron by adding a raw material of iron, a carbon material, and a flux to a furnace body and blowing pure oxygen and/or an oxygen-enriched gas into the furnace, wherein the equipment comprises a plurality of furnace bodies and a set of a waste heat boiler and a generating facility adapted to vaporize the sensible heat and latent heat of a combustible gas generated from the furnace bodies to recover the vapor and connected through freely openable and closable ducts to the plurality of furnace bodies; and a method for operating the equipment wherein the secondary combustion rate within the furnaces is increased during the usual operation of both furnaces to lower the heat quantity of the combustible gas for each furnace, while during the operation of one furnace, the secondary combustion rate within the furnace is lowered to double the heat quantity of the combustible gas for each furnace, thereby permitting the total heat quantity of the combustible gas of the two furnaces to be made constant.
Inventors:
ICHIKAWA HIROSHI (JP)
Application Number:
PCT/JP1997/000166
Publication Date:
July 31, 1997
Filing Date:
January 24, 1997
Export Citation:
Assignee:
NIPPON STEEL CORP (JP)
ICHIKAWA HIROSHI (JP)
ICHIKAWA HIROSHI (JP)
International Classes:
C21B11/00; C21B13/00; F27B3/22; F27B19/02; F27D17/00; F27B3/04; (IPC1-7): C21B11/00
Foreign References:
| JPH0828353A | 1996-01-30 | |||
| JPH04311632A | 1992-11-04 |
Other References:
See also references of EP 0823487A4
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