Anode polarization detector
Abstract
Abstract THIS INVENTION DESCRIBES A METHOD AND A SYSTEM FOR INDICATING THE ALUMINA REQUIREMENTS OF THE MOLTEN BATH IN AN ELECTROLYTIC CELL FOR THE PRODUCTION OF ALUMINUM SO AS TO MAINTAIN STABLE OPERATION. A REFERENCE ELECTRODE IS INSERTED INTO THE MOLTEN BATH OF THE CELL AND AN INSTRUMENT FOR MEASURING POTENTIAL IS CONNECTED BETWEEN THE REFERENCE ELECTRODE AND THE OPERATING ANODE SYSTEM OF THE CELL SO AS TO MEASURE THE POTENTIAL DIFFERENCE BETWEEN THE REFERENCE ELECTRODE AND THE OPERATING SYSTEM OF THE CELL. INCREASING POTENTIAL DIFFERENCE INDICATES INCREASING POLARIZATION OF THE OPERATING ANODE SYSTEM AND DECREASING ALUMINA CONTENT IN THE MOLTEN BATH. DECREASING POTENTIAL DIFFERENCE INDICATES DECREASING POLARIZATION OF THE OPERATING ANODE SYSTEM AND INCREASING ALUMINA CONTENT OF THE BATH. IN ACCORDANCE WITH THE INDICATION RECEIVED, THE ALUMINA CONTENT IN THE BATH IS ADJUSTED AS NEEDED TO MAINTAIN STABLE OPERATION OF THE ELECTROLYTIC REDUCTION CELL.
Inventors
- 👤 Robert A Lewis
Bibliographic Details
Claims Analysis
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-05-10 | 1974-11-09 | 1975-05-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-05-10 | 1978-11-09 | 1979-05-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-05-10 | 1982-11-09 | 1983-05-11 | $7700.00 | Window Closed / Lapsed |