To provide a refining device and a refining method for refining metal in a short time to have high purity, reducing an amount of hydrogen gas to be introduced, and preventing the bubble of hydrogen from remaining in an upper part of an ingot and the upper part of the ingot from becoming undefined when solidifying metal.
Melted metal 6 on a scull S is exposed to a hydrogen environment having a high concentration by hydrogen gas blown into a melting furnace 3 from a nozzle 23 directly, and deoxidation reaction progresses efficiently until it reaches a low oxygen concentration to perform high purity refinement efficiently in a short time. By blowing hydrogen gas into the melting furnace 3 from the nozzle 23 directly, the hydrogen concentration is locally increased only in the vicinity of the melting furnace 3 in a short time, and the deoxidation reaction of the melted metal is efficiently performed up to the low oxygen concentration without increasing the hydrogen concentration in an airtight vessel 2 as a whole.
| JP2000055567 | INDUCTION HEATING DEVICE |
| JPH063059 | REMELTING FURNACE |
| WO/2012/015132 | HEAT TREATMENT CONTAINER FOR VACUUM HEAT TREATMENT APPARATUS |
TSUDA MASANORI
| JP2001279340A | 2001-10-10 | |||
| JP2000258066A | 2000-09-22 | |||
| JPH06299261A | 1994-10-25 | |||
| JP2001335854A | 2001-12-04 | |||
| JPH06212299A | 1994-08-02 | |||
| JPS59219424A | 1984-12-10 | |||
| JPH10318683A | 1998-12-04 |
Tadashi Takahashi
Takashi Watanabe
Masakazu Aoyama
Suzuki Mitsuyoshi
Kazuya Nishi
Yasuhiko Murayama