| 摘要 |
<p>Cooling system for cathodes, or electrodes, (11) in Direct Current electric arc furnaces, the cathodes (11) comprising a lower consumable graphite part (11a), from which the electric arc is sparked, associated at the upper part with a hollow metallic part (11b) by means of a joint (13), inside the metallic part (11b) there being included a closed cooling circuit (19) with water or other similar cooling fluid, defining an area of evaporation (17) arranged substantially in cooperation with the lower end of the metallic part (11b) and an area of condensation (18) arranged in cooperation with a desired upper area of the metallic part (11b), the area of condensation (18) cooperating with a heat exchanger (15) associated with the outer wall of the metallic part (11b), there also being included an ascending channel (14) for the steam (19a) from the evaporation area (17) to the area of condensation (18) and at least a descending channel (16) whereby the condensation descends, under force of gravity, from the area of condensation (18) to the area of evaporation (17), the descending channel (14) and ascending channel (16) communicating with each other in correspondence with the area of evaporation (17) and the area of condensation (18), the descending channel (16) corresponding with the inner wall of the metallic part (11b) and having an inferior section than the section of the ascending channel (14). <IMAGE></p> |
