| 摘要 |
<p>The wall masonry lining in an electrical three-phase arc furnace is induced to wear evenly by a magnetic field arrangement symmetrically about the electrodes which intersect the electric arc in the furnace chamber above the furnace charge. This ensures uniform distribution of the wear caused by the electric arcs. This keeps the wall lining costs low. The magnetic field in the furnace chamber is directed through the lining of the furnace bottom and through the furnace charge. The electric arcs are deflected alternately to both sides by the magnetic fields which are built up by the current flowing through the electrodes. The polarity of the magnetic fields intersecting the arc may be held constant. Alternatively, the polarity of the magnetic field periodically intersecting the arc is reversed at a frequency which is less than half of the frequency of the electrode current.</p> |
