WIPO logo
Mobile | Deutsch | Español | Français | 日本語 | 한국어 | Português | Русский | 中文 | العربية |
PATENTSCOPE

Search International and National Patent Collections
World Intellectual Property Organization
Search
 
Browse
 
Translate
 
Options
 
News
 
Login
 
Help
 
Machine translation
1. (WO2003062474) PROCESS FOR PRODUCING MOLTEN IRON
Latest bibliographic data on file with the International Bureau   

Pub. No.:    WO/2003/062474    International Application No.:    PCT/JP2003/000298
Publication Date: 31.07.2003 International Filing Date: 16.01.2003
IPC:
C21B 13/00 (2006.01), C21B 13/10 (2006.01), C21B 13/14 (2006.01)
Applicants: KABUSHIKI KAISHA KOBE SEIKO SHO [JP/JP]; 10-26, Wakinohamacho 2-chome, Chuo-ku, Kobe-shi, Hyogo 651-8585 (JP) (For All Designated States Except US).
KOBAYASHI, Isao [JP/JP]; (JP) (For US Only).
MIYAHARA, Itsuo [JP/JP]; (JP) (For US Only).
TANAKA, Hidetoshi [JP/JP]; (JP) (For US Only).
TOKUDA, Koji [JP/JP]; (JP) (For US Only)
Inventors: KOBAYASHI, Isao; (JP).
MIYAHARA, Itsuo; (JP).
TANAKA, Hidetoshi; (JP).
TOKUDA, Koji; (JP)
Agent: KOTANI, Etsuji; Nichimen Building 2nd Floor, 2-2, Nakanoshima 2-chome, Kita-ku, Osaka-shi, Osaka 530-0005 (JP)
Priority Data:
2002-15741 24.01.2002 JP
2002-290389 02.10.2002 JP
Title (EN) PROCESS FOR PRODUCING MOLTEN IRON
(FR) PROCEDE DE PRODUCTION DE FER FONDU
Abstract: front page image
(EN)A process for producing molten iron wherein a formed material containing iron oxide and a carbonaceous reducing agent is used as a raw material, and a rotary hearth furnace and a melting furnace are connected, characterized in that said formed material is first charged into a heating and reducing furnace, to enhance a metallization rate to 60 % or more prior to the feed to the melting furnace, and the secondary burning rate of a CO gas in said melting furnace is controlled to 40 % or less. The process allows the suppression of the loss by melting of refractories of the rotary hearth furnace and the melting furnace, in combination with the production of a molten iron having an enhanced purity of iron with good productivity.
(FR)L'invention concerne un procédé permettant de produire du fer fondu. On utilise une matière formée contenant un oxyde de fer et un agent de réduction carboné comme matière première. Un four rotatif en terre et un four de fusion sont reliés. Ledit procédé est caractérisé en ce que la matière formée est d'abord chargée dans un four chauffant de réduction afin d'améliorer le taux de métallisation de 60 % ou plus avant d'alimenter le four de fusion, et en ce que la vitesse de combustion secondaire du gaz CO dans le four de fusion est réglée à 40 % ou moins. Ce procédé permet de supprimer les pertes par fusion de matières réfractaires du four rotatif en terre et du four de fusion tout en produisant du fer fondu à pureté améliorée avec un bon rendement.
Designated States: AE, AG, AL, AM, AT, AU, AZ, BA, BB, BG, BR, BY, BZ, CA, CH, CN, CO, CR, CU, CZ, DE, DK, DM, DZ, EC, EE, ES, FI, GB, GD, GE, GH, GM, HR, HU, ID, IL, IN, IS, KE, KG, KP, KR, KZ, LC, LK, LR, LS, LT, LU, LV, MA, MD, MG, MK, MN, MW, MX, MZ, NO, NZ, OM, PH, PL, PT, RO, RU, SC, SD, SE, SG, SK, SL, TJ, TM, TN, TR, TT, TZ, UA, UG, US, UZ, VC, VN, YU, ZA, ZM, ZW.
African Regional Intellectual Property Organization (GH, GM, KE, LS, MW, MZ, SD, SL, SZ, TZ, UG, ZM, ZW)
Eurasian Patent Organization (AM, AZ, BY, KG, KZ, MD, RU, TJ, TM)
European Patent Office (AT, BE, BG, CH, CY, CZ, DE, DK, EE, ES, FI, FR, GB, GR, HU, IE, IT, LU, MC, NL, PT, SE, SI, SK, TR)
African Intellectual Property Organization (BF, BJ, CF, CG, CI, CM, GA, GN, GQ, GW, ML, MR, NE, SN, TD, TG).
Publication Language: Japanese (JA)
Filing Language: Japanese (JA)