Title:
【発明の名称】アーク加熱炉の電極昇降制御装置
Document Type and Number:
Japanese Patent JP2903915
Kind Code:
B2
Abstract:
PURPOSE:To obtain an electrode lift controller of an arc heating furnace which achieves excellent operability by simplifying the construction to facilitate adjustment. CONSTITUTION:This apparatus is provided with an average current detection means 7 which detects current flowing through a plurality of electrodes 4 to determine a mean thereof, a set current-solid current comparison means 9 which compares the mean of the current detected by the means 7 with a preset value of current to output a control signal for lifting or lowering the electrode 4 according to a deviation thereof and a maximum current detection means 6 to detect the maximum of the current flowing through the electrodes 4. Then, a plurality of electrodes 4 are controlled to lift or lower in a batch so that the mean value of the current flowing the electrodes 4 reaches a current value preset while the maximum value of the current flowing through the electrodes 4 will not exceed the maximum allowable current value of a transformer 3 for a furnace.
Inventors:
HIRAIZUMI MITSUHISA
AO NORIO
AO NORIO
Application Number:
JP31414992A
Publication Date:
June 14, 1999
Filing Date:
October 29, 1992
Export Citation:
Assignee:
NIPPON KOKAN KK
International Classes:
C22B9/20; F27B3/08; F27B3/28; F27D11/08; F27D19/00; H05B7/148; (IPC1-7): F27B3/08; F27B3/28; F27D11/08; H05B7/148
Domestic Patent References:
| JP482195A | ||||
| JP4217782A | ||||
| JP59168997U | ||||
| JP232000Y2 |
Attorney, Agent or Firm:
Masatoshi Sato (1 person outside)