Process for producing high-purity aluminum
US4469512A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 29, 1982 |
| Grant date | Sep 4, 1984 |
| Priority date | — |
| Expiry date | Jul 29, 2002 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC22B21/06
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
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 as immersed in the boron-containing molten aluminum while introducing a cooling 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 centrifugally 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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.