C - Chemistry – Metallurgy – 22 – B
Patent
C - Chemistry, Metallurgy
22
B
39/101, 53/356,
C22B 4/00 (2006.01) C22B 4/08 (2006.01) F27B 14/06 (2006.01) F27B 14/10 (2006.01) F27D 9/00 (2006.01) H05B 6/24 (2006.01)
Patent
CA 2014956
SEGMENTED INDUCTION SKULL MELTING CRUCIBLE AND METHOD Abstract of The Invention The crucible includes an upstanding sidewall formed of a plurality of internally cooled, metal segments arranged in side-by side relation to form a crucible chamber for receiving the metal to be melted. The segments are separated from one another by longitudinal gaps that communicate on the inside with the crucible chamber and extend outwardly to the exterior of the sidewall. The gaps are free of packing material that could constitute a potential source of melt contamination and are so sized in a width dimension where the gap and the chamber communicate as to substantially prevent penetration of molten metal into the gaps when the metal charge is initially melted in the crucible chamber prior to the development of a solidified metal skull. Upper portions of the crucible segments are restrained against outward spreading during use to provide a crucible durable enough for use in production melting applications. The crucible eliminates the need for a CaF2 type lining (skull) and for intersegment refractory packing material, thereby improving melt cleanliness.
Diehm Randall S.
Zuidema Blake K.
Diehm Randall S.
Howmet Corporation
Macrae & Co.
Zuidema Blake K.
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