Sonic resonator control and method for determining component con

Details Sonic resonator control and method for determining component con Sonic resonator control and method for determining component con

1982-10-29

1984-05-08

Williams, Howard S.

Chemistry: electrical and wave energy

Processes and products

73 61R, 204 60, 204245, 364497, 436 73, C25C 320, C25C 300, G06F 1546, G06G 758

Patent

active

044473010

ABSTRACT:
This invention teaches a control to be used in smelting aluminum by the electrolysis breakdown of alumina (A1.sub.2 O.sub.3) in a molten electrolyte heated to approximately 950.degree.-1000.degree. 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.

REFERENCES:
patent: 2280226 (1942-04-01), Firestone
patent: 3346065 (1967-10-01), Bourquard
patent: 3444726 (1969-05-01), Young et al.
patent: 4255964 (1981-03-01), Morison
patent: 4261197 (1981-04-01), Mansfield
patent: 4287755 (1981-09-01), Mansfield

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