Method and device for measuring the temperature and the level of the molten electrolysis bath in cells for aluminum production
US6065867A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 11, 1995 |
| Grant date | May 23, 2000 |
| Priority date | — |
| Expiry date | Dec 11, 2015 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC25C3/20
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
A method for measuring temperature and electrolyte level of a molten electrolysis bath in a cell for production of aluminum by electrolysis of alumina includes the steps of: (a) piercing the crust of a solidified bath with a crust breaker and immersing into the electrolyte, an extremity of a temperature probe to a sufficient depth until an initial temperature reading of at least 850.degree. C. is measured, then maintaining the immersion of the probe, in said electrolyte for a length of time which is less than the time taken to establish the thermal equilibrium of the probe in the electrolyte, (b) withdrawing the probe and determining a temperature of the electrolyte by extrapolation of the temperature values measured by the probe, (c) measurement of the level of electrolyte in the cell by moving the lower extremity of the probe into contact with the electrolyte while recording potential signals between the cathodic substrate and the probe, and recording position signals corresponding to the position of the probe, and (d) determining the level of the electrolyte by comparison of recorded potential and position signals.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.