Title:
ELECTRIC FURNACE AND OPERATING METHOD THEREOF
Document Type and Number:
Japanese Patent JP3431877
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To process with overall cost reduced by reducing energy unit consump tion and oxidation loss in a molten iron.
SOLUTION: Iron ore is effectively melted, raised in temperature, decarbonized and refined in an electric furnace by mixedly using electric energy and fossil energy. In melting step, cold iron ore is melted by electric energy. In raising step, the material is decarbonized, raised in temperature and refined by blowing oxygen from oxygen blowing lance after melting, and melting operation can be processed by continuously feeding iron scrap during oxygen blowing operation. According to the defined method, inner diameter of the electric furnace can be reduced shorter than conventional one.
Inventors:
Kousuke Yamashita
Application Number:
JP2000031540A
Publication Date:
July 28, 2003
Filing Date:
February 09, 2000
Export Citation:
Assignee:
Nippon Steel Corporation
International Classes:
C22B9/20; C21C5/28; C21C5/30; F27B3/08; F27D11/08; (IPC1-7): F27B3/08; C21C5/28; C21C5/30; C22B9/20; F27D11/08
Domestic Patent References:
| JP6256833A | ||||
| JP50149510A | ||||
| JP11125488A | ||||
| JP61134580A |
Attorney, Agent or Firm:
Masamitsu Akizawa
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