Sonic resonator control and method for determining component concentration in multiple component molten liquids
This invention teaches a control to be used in smelting aluminum by the electrolysis breakdown of alumina (Al/sub 2/O/sub 3/) in a molten electrolyte heated to approximately 950/sup 0/-1000/sup 0/ C. The invention provides a sonic resonator and control that can accurately detect the resonant frequency of the resonator in the molten electrolyte. The resonator preferably is made with tubular side wall 1/4 of the sonic wavelength, or is a quarter wave resonator. A wave generator inputs a signal having a range of frequencies that includes the resonant frequency, so that a peak resonant output at the resonant frequency can be detected on an oscilloscope or like detector. This instantaneous resonant frequency is then checked against an accurate data base correlating the resonant frequencies of the resonator in the electrolyte at specific alumina concentrations normally experienced throughout the electrolysis cycle. The electrolysis cycle can thus be controlled and recharged at any predetermined low alumina concentration greater than where the anode effect phase of the cycle normally might begin.
- Assignee:
- Dept. of Energy
- Patent Number(s):
- US 4447301
- OSTI ID:
- 6369869
- Resource Relation:
- Patent File Date: Filed date 29 Oct 1982; Other Information: PAT-APPL-437787
- Country of Publication:
- United States
- Language:
- English
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Sonic resonator control and method for determining component concentration in multiple-component liquid
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Related Subjects
42 ENGINEERING
ALUMINIUM
SMELTING
ALUMINIUM OXIDES
ACOUSTIC MONITORING
ELECTROLYSIS
ELECTROLYTES
CHEMICAL COMPOSITION
ON-LINE MEASUREMENT SYSTEMS
DESIGN
RESONATORS
FREQUENCY CONTROL
FREQUENCY DEPENDENCE
LIQUID METALS
PROCESS CONTROL
QUANTITY RATIO
VERY HIGH TEMPERATURE
ALUMINIUM COMPOUNDS
CHALCOGENIDES
CONTROL
ELECTRONIC EQUIPMENT
ELEMENTS
EQUIPMENT
FLUIDS
LIQUIDS
LYSIS
METALS
MONITORING
ON-LINE SYSTEMS
OXIDES
OXYGEN COMPOUNDS
360101* - Metals & Alloys- Preparation & Fabrication
420800 - Engineering- Electronic Circuits & Devices- (-1989)