Title:
ELEVATION CONTROL METHOD AND DEVICE OF ELECTRODE IN ARC FURNACE
Document Type and Number:
Japanese Patent JP3738506
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To prevent an electrode from being buried in a metal scrap and broken and prevent lowering steel yield efficiency due to breaking accident and increasing running cost.
SOLUTION: Electrode elevation devices L1, L2, L3 are controlled by a rapid pulling up circuit 30 of an elevation control unit 26, and electrodes E1, E2, E3 are rapidly pulled up. A rapid pulling up contact of the rapid pulling up circuit 30 is actuated ON when a rapid pulling up instruction is outputted and controlled so as to lift up the electrodes E1, E2, E3 rapidly. For example, when the rapid pulling up instruction is outputted to the first and second electrodes E1 and E2, and first and second pulling up contacts of the rapid pulling up contact are actuated ON, the first and second electrodes E1 and E2 are pulled up rapidly. A protection contact is actuated ON by permitting both rapid pulling up contacts to be actuated ON, a rapid pulling up instruction is outputted to the remaining electrode E3, and the electrode E3 is pulled up rapidly.
Inventors:
Shoji Kitabayashi
Masakatsu Naruse
Masakatsu Naruse
Application Number:
JP32780596A
Publication Date:
January 25, 2006
Filing Date:
November 22, 1996
Export Citation:
Assignee:
Daido Steel Co., Ltd.
International Classes:
H05B7/12; H05B7/148; (IPC1-7): H05B7/12; H05B7/148
Domestic Patent References:
| JP59003890A | ||||
| JP62113383A | ||||
| JP62097U |
Attorney, Agent or Firm:
Kiiku Yamamoto