| 摘要 |
Electrode for an arc furnace, preferably for a d.c. arc furnace, provided with a central channel for feeding powdered or piece-formed material containing metals, such as iron, chromium, nickel, etc. and/or oxides of these metals, as well as reducing and/or refining agents. According to the invention the electrode (7) consists of a metallic portion and a graphite tip (1) attached to the lower end of the metallic portion and the central channel of the electrode is formed by a tube (4) which almost completely passes through the metallic portion and the graphite tip (1) of the electrode (7). The metallic portion is arranged around the tube (4), and is provided with coolant channels (3, 9) which are arranged such that one or more coolant channels (9) provide circulation of cooling water towards portions located nearest around the central tube (4) and one or more coolant channels (3) provide circulation of cooling water nearer to the electrode periphery for cooling of the electrode. |
