| 摘要 |
<p>PURPOSE:To suppress the in-rust current to be generated when a power supply is turned on in a cold start method of an electroslag refining process by forming the top end of a consumable electrode to the sectional area smaller than the sectional area of the body part. CONSTITUTION:A high-quality ingot 2 is formed by immersing the consumable electrode into molten slag 4 in an electroslag refining crucible 1, energizing the crucible 1 and the consumable electrode 5 from the AC power supply 9, melting the consumable electrode 5 by the Joule heat generated in the molten slag 4 and removing impurities by the slag 4. The initial shape of the consumable electrode 5 to be used at this time is formed to the sectional area smaller than the sectional area of the body part 5b. The in-rush current to be generated instantaneously when the power supply is turned on is thereby suppressed and stable firing is executed; in addition, the damage of a stool, etc., is prevented.</p> |
