Title:
METHOD AND DEVICE FOR MELTING RARE EARTH MAGNET SCRAP AND PRIMARY MOLTEN ALLOY OF RARE EARTH MAGNET
Document Type and Number:
WIPO Patent Application WO2000039514
Kind Code:
A9
Abstract:
A magnet for increasing a yield attained during a process in which, when separating metals from scraps occurring during a rare earth magnet production process, alloy materials for rare earth magnet are melt-refined so as to positively separate oxides and then subjected to a secondary melting by using a vacuum high-frequency induction melting furnace; wherein part or all of the scraps (3) are charged into an insulated (2) water-cooled crucible (1) or a refractory crucible (7, 21, 22) and subjected to twin plasma arc (10A, 10b) melting and tungsten arc or migration arc (15) melting.
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Inventors:
HIROSE YOICHI (JP)
GO TATSUO (JP)
RENDA MIKI (JP)
KAWAMURA NOBUHIKO (JP)
OTAKI ATSUSHI (JP)
GO TATSUO (JP)
RENDA MIKI (JP)
KAWAMURA NOBUHIKO (JP)
OTAKI ATSUSHI (JP)
Application Number:
PCT/JP1999/007264
Publication Date:
October 04, 2001
Filing Date:
December 24, 1999
Export Citation:
Assignee:
SHOWA DENKO KK (JP)
HIROSE YOICHI (JP)
GO TATSUO (JP)
RENDA MIKI (JP)
KAWAMURA NOBUHIKO (JP)
OTAKI ATSUSHI (JP)
HIROSE YOICHI (JP)
GO TATSUO (JP)
RENDA MIKI (JP)
KAWAMURA NOBUHIKO (JP)
OTAKI ATSUSHI (JP)
International Classes:
C22B7/00; C22B9/22; C22B59/00; F27B3/08; F27B3/24; (IPC1-7): F27B14/14
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