Title:
OPERATION OF ARC FURNACE
Document Type and Number:
Japanese Patent JPH1121607
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide an operational method reducing the unit requirement of electric power, at the time of producing molten steel by using HBI or DRI at the blending ratio of >=50% in an arc furnace. SOLUTION: In the arc furnace providing a preheating furnace 7 preheated with exhaust gas of the arc furnace 1, the DRI(direct reduced iron) is blended at >=50% of the iron source and also, after preheating the DRI to <=400 deg.C with the preheating furnace, the DRI is continuously charged into the arc furnace. Further, in case of using the HBI(hot briquette iron) instead of the direct reduced iron, the preheating temp. is made to be <=800 deg.C. At this time, O2 gas for burning auxiliary heat source of coke, etc., is blown at >=35 Nm<3> /ton and then, the unit requirement of the electric power is further reduced. The control of the preheating temp. can easily be executed by controlling the exhaust gas flow rate introduced into the preheating furnace after dividing the exhaust gas from the arc furnace.
Inventors:
MIZUKAMI HIDEAKI
NAKAYAMA TAKESHI
NAKAYAMA TAKESHI
Application Number:
JP18083297A
Publication Date:
January 26, 1999
Filing Date:
July 07, 1997
Export Citation:
Assignee:
NIPPON KOKAN KK
International Classes:
C21B13/12; F27D13/00; (IPC1-7): C21B13/12; F27D13/00
Attorney, Agent or Firm:
Shigeru Takano
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