To provide an arc furnace electrode lifting device capable of saving energy of furnace operation, and capable of shortening operation time.
This arc furnace electrode lifting device is composed of an impedance constant control means 82 controlling so that impedance between an electrode 4 and a scrap 5 becomes constant, a constant current control means 83 controlling so that an arc current becomes a preset value, a switching means 84 switching the impedance constant control means 82 and the constant current control means 83, an electric power consumption checking means 86 determining whether or not electric power consumption of an arc furnace becomes a predetermined value or more, a flicker checking means 87 determining whether or not a flicker quantity becomes a predetermined value or less for a predetermined time, a furnace state checking means 88 determining whether or not both arc voltage and the arc current become a predetermined value or less for a predetermined time, and an arithmetic operation means 89 arithmetically processing a determining result of the electric power consumption checking means 86, the flicker checking means 87 and the furnace state checking means 88. The switching means 84 is operated by a result of the arithmetic operation means 89.
JP2001250673A | 2001-09-14 |
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