Title:
竪型炉及びその操業方法
Document Type and Number:
Japanese Patent JP4350153
Kind Code:
B2
Abstract:
A shaft furnace for producing pig iron by charging an iron source of high metallization rate whose average metallization rate is 95% or greater and a solid fuel containing 70 to 100 mass% of blast furnace coke in layered state or mixed state from the furnace top onto a bed of coke filling a lower region of the furnace and melting the iron source by blowing in air through tuyeres at the bottom region of the furnace, which shaft furnace is characterized that: (i) the distance from the lower face of the lowest tier of tuyeres in the direction of the furnace height to the upper face of a bottom plate at the furnace bottom is 0.7-fold or greater the furnace diameter at the location of the lower face of the tuyeres; and (ii) as calculated from the heat conductivities and thicknesses of lining refractories individually installed on the shaft part, tuyere periphery, wall portion on the furnace bottom side and the bottom plate at the furnace bottom, the furnace body heat radiation per unit internal volume in the furnace height range from the shaft part to the bottom plate at the furnace bottom is 0.15 MW/m 3 or less.
Inventors:
Akihiko Shinotake
Yasuhiko Omatsu
Makoto Naito
Kazuki Akagi
Norio Nitta
Atsushi Tsubota
Kikuchi Zenetsu
Murase Shin
Hiroyuki Suzuki
Tsuyoshi Matsuda
Hans-Yarn Rachner
Michael lampere
Yasuhiko Omatsu
Makoto Naito
Kazuki Akagi
Norio Nitta
Atsushi Tsubota
Kikuchi Zenetsu
Murase Shin
Hiroyuki Suzuki
Tsuyoshi Matsuda
Hans-Yarn Rachner
Michael lampere
Application Number:
JP2008177087A
Publication Date:
October 21, 2009
Filing Date:
July 07, 2008
Export Citation:
Assignee:
Nippon Steel Corporation
Kutner Gesell Shaft Mitt Beschlenktel Haftung Und Company Comandito Gesell Shaft
Kutner Gesell Shaft Mitt Beschlenktel Haftung Und Company Comandito Gesell Shaft
International Classes:
C21B11/02; C22B7/02; F27B1/14; F27B1/16
Domestic Patent References:
| JP10036906A | ||||
| JP11071607A |
Other References:
亀井 康夫 他2名,微粉炭多量吹き込みを併用した高酸素濃度空気吹き竪型炉によるスクラップ溶解,鉄と鋼,日本,社団法人 日本鉄鋼協会,1993年 2月 1日,Vol.79,No.2,p.139-146
Attorney, Agent or Firm:
Atsushi Aoki
Takashi Ishida
Tetsuji Koga
Hiroshi Kamematsu
Nakamura Asayuki
Takashi Ishida
Tetsuji Koga
Hiroshi Kamematsu
Nakamura Asayuki