| 摘要 |
<p>1526311 Arc furnace ASEA AB 13 Jan 1976 [14 Jan 1975] 01154/76 Heading H5H Deflection of the arc 9 in a D.C. furnace with an asymmetrical hearth electrode 5 caused by the field produced by the hearth current is obviated by the use of at least one so called compensating conductor 8 arranged at least partly below the furnace and in series with the arc current so that it produces an opposing magnetic field to the hearth current. This arrangement is self-regulating at different arc currents. A magnetic core 10 associated with the conductor 8 may be adjusted relative the non-magnetic bottom of the furnace to vary the compensating magnetic field. A four pole arc rotating A.C. magnet may be provided beneath the furnace as in Specification 1,505,381. Cores provided for each pole serve two functions; as cores for the rotating magnet and as cores for the compensating conductor. Double coils of suitably orientated compensating conductors may be placed beneath large furnaces. Alternatively, the arrangement shown in Fig. 3 may be used. Two parallel conductors 8 beneath the conductor are connected in series with diametrically opposed horizontal conductors 17, 18 arranged around the upper part of the furnace. The horizontal conductors 17, 18 are vertically adjustable on vertical interconnecting conductors 15, 16, 19, 20 to vary their effect on the arc. All of the conductors shown, 8, 15, 16, 17, 18, 19 and 20 influence the arc.</p> |
