Title:
交流アーク炉の電極昇降装置
Document Type and Number:
Japanese Patent JP5742400
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide an electrode lifting device of an AC arc furnace which is capable of substantially reducing arc stops generated during an operation, shortening the operation time, and reducing a power cost.SOLUTION: This electrode lifting device includes an electrode 2 for generating arc between a scrap 4 and melting the scrap 4 inside a furnace body 3, an electric motor 5 for driving the electrode 2, and a controller 6 for controlling the electric motor 5. The controller 6 controls the electric motor 5 so that impedance between the electrode 2 and the scrap 4 is fixed at normal time. Also, when the length of the arc generated between the electrode 2 and the scrap 4 becomes a prescribed value or longer, the controller 6 cancels impedance fixing control and controls the electric motor 5 so as to lower the electrode 2.
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Inventors:
Takatoshi Asaka
Application Number:
JP2011085079A
Publication Date:
July 01, 2015
Filing Date:
April 07, 2011
Export Citation:
Assignee:
Toshiba Mitsubishi Electric Industrial Systems Co., Ltd.
International Classes:
F27B3/28; C21C5/52; F27B3/20; F27D11/08; H05B7/08
Domestic Patent References:
| JP61174199U | ||||
| JP62223999A | ||||
| JP2001250673A | ||||
| JP2002208472A | ||||
| JP61285693A | ||||
| JP4308686A | ||||
| JP3008290A | ||||
| JP2008511949A |
Attorney, Agent or Firm:
Mamoru Takada
Hideki Takahashi
Hideki Takahashi