C - Chemistry – Metallurgy – 22 – B
Patent
C - Chemistry, Metallurgy
22
B
53/247
C22B 21/06 (2006.01)
Patent
CA 1195124
ABSTRACT OF THE DISCLOSURE To obtain a high-purity aluminum fraction from aluminum containing both eutectic impurities and peritectic impurities, the contents of these impurities in the original aluminum are reduced by melting the original aluminum to obtain molten aluminum, adding boron to the molten aluminum, and rotating a cooling body immersed in the boron-containing molten aluminum while introducing a cool- ing fluid to the interior of the body to crystallize high-purity aluminum on the surface of the body. The peritectic impurities react with the boron to form metallic borides, which are centri- fugally forced away from the cooling body by the rotation of the body without being incorporated into the aluminum crystallized on the surface of the body. The eutectic impurities are removed from the crystallized aluminum on the surface based on the principle of segregation.
408353
Arai Kozo
Nishide Toshio
Otsuka Ryotatsu
Sakaguchi Masashi
Shingu Hideo
Fetherstonhaugh & Co.
Showa Denko K.k.
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