C - Chemistry – Metallurgy – 22 – B
Patent
C - Chemistry, Metallurgy
22
B
39/108, 53/358
C22B 9/02 (2006.01) B01D 9/00 (2006.01) C01B 33/037 (2006.01) C22B 13/06 (2006.01) C22B 19/32 (2006.01) C22B 21/06 (2006.01) C22B 26/22 (2006.01) F27B 14/00 (2006.01)
Patent
CA 1308263
ABSTRACT OF THE DISCLOSURE A metal having a high purity is prepared by immersing a hollow rotary cooling member in a molten metal containing eutectic impurities and rotating the cool- ing member while supplying a cooling fluid to the interior of the cooling member, whereby the high-purity metal is caused to crystallize out on a metal deposition area of the peripheral surface portion of the cooling member present under the surface of the molten metal, the metal deposition area being the peripheral surface of at least a part of the entire portion, present under the melt surface, of the member. When the purified metal is caused to crystallize out by rotating the cooling member, a flow of molten metal having a downward velocity component is produced in the vicinity of an upper part of the entire portion, present under the melt suface, of the cooling member.
555202
Otsuka Ryotatsu
Tanimoto Shigemi
Toyoda Kazuo
Fetherstonhaugh & Co.
Showa Denko K.k.
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