Title:
高炉シャフト部への水素含有還元ガス供給方法
Document Type and Number:
Japanese Patent JP6717629
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a method for supplying a reduction gas to a blast furnace shaft part capable of supplying a large amount of reductive gas containing high concentration of hydrogen to deeper position in a blast furnace and reducing COgeneration amount summing COamount reduced by hydrogen refinement by the blast furnace and COamount generated during manufacturing the reduction gas.SOLUTION: A reduction gas by generating a modified gas rich in hydrogen gas by modifying a coke furnace gas with increasing temperature to 1200 to 1800°C in a reactor in which an oxygen-containing gas is supplied to preheated coke furnace gas, then mixing a CO-containing gas to the modified gas in the reactor and adjusting hydrogen concentration to 15 to 35 vol.% (wet) is supplied to a high blast furnace shaft part under a condition with a ratio of reduction gas blow flow amount to the shaft part/gas blow flow amount to a tuyere of over 0.42 to 1.0 or less.SELECTED DRAWING: Figure 3
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Inventors:
Nobuaki Ito
Donomae etc.
Kimihito Suzuki
Kenji Nakao
Toyoshio Isohara
Donomae etc.
Kimihito Suzuki
Kenji Nakao
Toyoshio Isohara
Application Number:
JP2016062351A
Publication Date:
July 01, 2020
Filing Date:
March 25, 2016
Export Citation:
Assignee:
Nippon Steel Corporation
jfe Steel Corporation
KABUSHIKI KAISHA KOBE SEIKO SHO
Nittetsu Nisshin Steel Co., Ltd.
Nippon Steel Engineering Co., Ltd.
jfe Steel Corporation
KABUSHIKI KAISHA KOBE SEIKO SHO
Nittetsu Nisshin Steel Co., Ltd.
Nippon Steel Engineering Co., Ltd.
International Classes:
C21B5/00; C01B3/00; C01B3/36; C10K3/00; F27D17/00
Domestic Patent References:
| JP2016050345A | ||||
| JP2016037624A | ||||
| JP2017503922A |
Attorney, Agent or Firm:
Atsushi Aoki
Takashi Ishida
Tetsuji Koga
Fukuchi Ritsuo
Satoshi Deno
Naori Kota
Takashi Ishida
Tetsuji Koga
Fukuchi Ritsuo
Satoshi Deno
Naori Kota