| 摘要 |
<p>PURPOSE:To surely generate arc while avoiding defective ignition of the arc by charging the remaining scraps after initially charging the scraps composed of fine pieces and starting the operation. CONSTITUTION:At the time of charging the scraps 5 into a DC arc furnace 1 and conducting the electric current between a furnace top electrode 2 and a furnace bottom electrode 3 to start the melting, after covering the furnace bottom electrode 3 by using the fine pieces of the scraps 5A as the scrap at least initially charged, the remaining scraps 5B are charged. By this method, the scraps are brought into contact with the furnace bottom electrode 3 and further, as contact of each fine piece of the scraps is held each other and electric contact between the fine scraps and the large scraps is sure, the defective electric contact is eliminated as the whole scraps, and generation of arc can smoothly be executed.</p> |
