Title:
炉床回転炉を用いた炭素含有鉄の製造方法および製造装置
Document Type and Number:
Japanese Patent JP4231960
Kind Code:
B2
Abstract:
The present invention is an apparatus and method for the direct reduction of iron oxide utilizing a rotary hearth furnace to form a high purity carbon-containing iron metal button. The hearth layer may be a refractory or a vitreous hearth layer of iron oxide, carbon, and silica compounds. Additionally, coating materials may be introduced onto the refractory or vitreous hearth layer before iron oxide ore and carbon materials are added, with the coating materials preventing attack of the molten iron on the hearth layer. The coating materials may include compounds of carbon, iron oxide, silicon oxide, magnesium oxide, and/or aluminum oxide. The coating materials may be placed as a solid or a slurry on the hearth layer and heated, which provides a protective layer onto which the iron oxide ores and carbon materials are placed. The iron oxide is reduced and forms molten globules of high purity iron and residual carbon, which remain separate from the hearth layer. An improved apparatus includes a cooling plate that is placed in close proximity with the refractory or vitreous hearth layer, cooling the molten globules to form iron metal buttons that are removed from the hearth layer. The improvements due to the present apparatus and method of operation provide high purity iron and carbon solid buttons, which are separate from slag particulates, and discharged without significant loss of iron product to the interior surfaces of the furnace.
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Inventors:
Koji Tokuda
Takuya Negami
Akira Urakami
Yasuhiro Tanigaki
Isao Kobayashi
Osamu Tsushita
Kikuchi
Shuzo Ito
David Sea Meissner
Glen E Hoffman
Kyle jay shoop
Takuya Negami
Akira Urakami
Yasuhiro Tanigaki
Isao Kobayashi
Osamu Tsushita
Kikuchi
Shuzo Ito
David Sea Meissner
Glen E Hoffman
Kyle jay shoop
Application Number:
JP32329099A
Publication Date:
March 04, 2009
Filing Date:
November 12, 1999
Export Citation:
Assignee:
KABUSHIKI KAISHA KOBE SEIKO SHO
International Classes:
C21B13/10
Domestic Patent References:
| JP45019569B1 | ||||
| JP52027084B1 |
Attorney, Agent or Firm:
Kyuichi Ueki