To prevent the contamination of a molten metal caused by a starting block upon cold crucible induction melting, and to achieve the edge cutting of the starting block and to achieve reuse of the same.
A cold crucible induction melting process is disclosed by which the furnace bottom part of a melting furnace where a metal raw material is melted while additionally charging the metal raw material, is drawn out to produce a metal ingot. In the process, a starting block having a composition almost same as that of the final composition of the metal ingot has been arranged on the furnace bottom part, at the initial stage of the melting, the metal is melted together with a part of the starting block on the starting block, and thereafter the metal raw material is melted while additionally charging the metal raw material, and the drawing-out is performed. The metal ingot can be obtained without causing such a phenomenon that impurity elements are infiltrated into the molten metal and pollution occurs. A melting operation can be smoothly performed even without incurring edge cutting between the molten metal and the starting block.
COPYRIGHT: (C)2011,JPO&INPIT
MURO MASAHIKO
KAKIHARA HAJIME
| JP2008051376A | 2008-03-06 | |||
| JPH08141705A | 1996-06-04 | |||
| JP2007513772A | 2007-05-31 | |||
| JP2007152386A | 2007-06-21 |
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