Method and apparatus for continuously determining the internal resistance of an electrolysis cell
US3969669A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 7, 1975 |
| Grant date | Jul 13, 1976 |
| Priority date | — |
| Expiry date | May 7, 1995 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R27/08
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The invention relates to a method of continuously determining the internal resistance of an electrolysis cell and to an apparatus for carrying out this method. In the method according to the invention a weak alternating current (if) of frequency (f) is superimposed upon the electrolysis current, the active part (rf) of the impedance which the cell offers to this alternating current is measured, followed by extrapolation to the zero frequency of the function giving the active part (rf) of the impedance as a function of the frequency (f), (rf) thus inclining towards the internal resistance of the cell. The invention is applicable to any electrolysis cell and more particularly to cells for the igneous electrolysis of alumina.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.