| 摘要 |
<p>PURPOSE:To suppress fusion loss due to melted metal and to obtain furnace wall electrodes which do not need a cooling mechanism by passing one or more high melting point conductive materials molded in a rod state through the wall of a DC arc furnace composed of an indeterminate form refractory material, and using the material as an electrode of the side in contact with the melting metal. CONSTITUTION:A supporting plate 3a in which a plurality of rodlike electrodes 5 are stood in a furnace bottom electrode mounting hole 4 is secured to an iron sheath 3 by fittings 9. An indeterminate form refractory material 10 such as magnesia, etc., is filled in the hole 4, and the material 10 is pounded in a state that the electrodes 5 are buried by ramming or applying vibration thereto. As a result, the plurality of electrodes 5 are passed through the wall to be disposed in the hole 4. High melting point conductive materials are employed as the electrodes 5 to obtain electrodes having excellent durability. The materials are satisfactorily draped with the material 10 filled in the hole 4, and no gap for causing intrusion of melted material, etc., is formed between the electrodes 5 and the material 10. Further, since heat resistance is excellent as compared with metal, it is not necessary to cool the rear ends of the electrodes 5.</p> |
