Title:
【発明の名称】直流アーク炉炉底電極の維持方法
Document Type and Number:
Japanese Patent JP2920972
Kind Code:
B2
Abstract:
PURPOSE:To prevent wear of a furnace bottom electrode and to maintain the electrode so that multiple times of meltings can be executed by supplementing electrode supplemental material of pure iron, etc., into melting part above the furnace bottom electrode after tapping off molten steel from a DC arc furnace. CONSTITUTION:After tapping off the molten steel from the DC arc furnace, to the melting part 1A above the furnace bottom electrode 1, the electrode supplemental material 5A composed of the pure iron or high m.p. ferro-alloy is supplemented. As sp. gr. of the supplemental material 5A is larger than that of the molten steel 4, the charged supplemental material is sunk and melted from the surface thereof with sensible heat held in the molten steel and mingled. By this method, as the m.p. is raised as the whole molten steel and on the other hand, because of conducted heat caused by mingle of the cold material, consumption of latent heat for melting a part thereof and further, continuing heat radiation to the circumference, the temp. in system is dropped and the molten part is solidified soon. Melting of the solidified part above the furnace bottom electrode can't be prevented in the next melting cycle, but the time needed to the melting is prolonged.
Inventors:
NISHIMURA TSUKASA
NAKATSUBO SHUICHI
NAKATSUBO SHUICHI
Application Number:
JP32003589A
Publication Date:
July 19, 1999
Filing Date:
December 08, 1989
Export Citation:
Assignee:
DAIDO TOKUSHUKO KK
International Classes:
C21B3/08; C21C5/52; C22B9/20; F27B3/08; F27D11/08; H05B7/12; (IPC1-7): F27B3/08; C21C5/52; C22B9/20; F27D11/08; H05B7/12
Domestic Patent References:
| JP53103909A | ||||
| JP60103292A | ||||
| JP5397645A |
Attorney, Agent or Firm:
Sou Suga