Title:
METHOD FOR PRODUCING SINTERED ORE
Document Type and Number:
WIPO Patent Application WO/2011/118822
Kind Code:
A1
Abstract:
Disclosed is a method for producing a sintered ore, which involves: forming a charged layer by charging a sintering starting material comprising fine ore and a carbon material on a circulating pallet; igniting the carbon material on the surface of the charged layer; introducing air, which contains gas fuel that is diluted to the lower combustion limit concentration or less and which is above the charged layer, into the charged layer by sucking the aforementioned air by means of a wind box disposed below the pallet; and burning the aforementioned gas fuel and the carbon material within the charged layer. The aforementioned method for producing a sintered ore also involves: supplying the abovementioned gas fuel to a region, in which the high-temperature retention period during which the temperature is retained at 1200°C to 1400°C inclusive lasts for less than 150 seconds, when sintering at the heat of combustion of the carbon material; setting the high-temperature retention period to 150 seconds or more; and enriching the oxygen within the air in the gas fuel supplying region.
Inventors:
IWAMI YUJI (JP)
OYAMA NOBUYUKI (JP)
OYAMA NOBUYUKI (JP)
Application Number:
PCT/JP2011/057494
Publication Date:
September 29, 2011
Filing Date:
March 18, 2011
Export Citation:
Assignee:
JFE STEEL CORP (JP)
IWAMI YUJI (JP)
OYAMA NOBUYUKI (JP)
IWAMI YUJI (JP)
OYAMA NOBUYUKI (JP)
International Classes:
C22B1/20
Foreign References:
| JP2008291354A | 2008-12-04 | |||
| JP2008095170A | 2008-04-24 | |||
| JP2010126775A | 2010-06-10 | |||
| JP2011052859A | 2011-03-17 |
Attorney, Agent or Firm:
OCHIAI, Kenichiro (JP)
Ken-ichiro Ochiai (JP)
Ken-ichiro Ochiai (JP)
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Claims: