Method of producing aluminium in an electrolysis cell
US8961773B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 5, 2009 |
| Grant date | Feb 24, 2015 |
| Priority date | — |
| Expiry date | May 2, 2032 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC25C3/14
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
The invention relates to a method of producing aluminum in an electrolysis cell, which includes setting up a succession of control periods of duration T, identifying perturbative tending operations on the cell that can introduce superfluous alumina in the electrolytic bath, noting the performance of the perturbative tending operations, determining a regulation feed rate B(k′) for each control period k′ and setting a specified feed rate SR(k′) equal to M(k′)×B(k′), where M(k′) is a predetermined modulation factor that modulates the regulation feed rate B(k′) so as to take into account a reduction of the needs of the cell induced by the superfluous alumina. The method of the invention makes it possible to significantly reduce the rate of occurrence of anode effects.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.