EP 0099948 B1 19861120 - PROCESS FOR PRODUCING HIGH-PURITY ALUMINUM
Title (en)
PROCESS FOR PRODUCING HIGH-PURITY ALUMINUM
Publication
Application
Priority
EP 82303995 A 19820728
Abstract (en)
[origin: EP0099948A1] 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 (1), adding boron to the molten aluminum (1), and rotating a cooling body (3) as immersed in the boron-containing molten aluminum (1) while introducing a cooling fluid to the interior of the body (3) to crystallize high-purity aluminum on the surface of the body (3). The peritectic impurities react with the boron to form metallic borides which are centrifugally forced away from the cooling body (3) by the rotation of the latter without being incorporated into the aluminum crystallized on the surface of the body (3). The eutectic impurities are removed from the crystallized aluminum on the surface based on the principle of segregation.
IPC 1-7
IPC 8 full level
C22B 21/06 (2006.01)
CPC (source: EP)
C22B 21/06 (2013.01)
Designated contracting state (EPC)
CH DE FR GB IT LI
DOCDB simple family (publication)
EP 0099948 A1 19840208; EP 0099948 B1 19861120; DE 3274369 D1 19870108
DOCDB simple family (application)
EP 82303995 A 19820728; DE 3274369 T 19820728