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Title: Sonic resonator control and method for determining component concentration in multiple component molten liquids

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.

Inventors:
 [1]
  1. Woodridge, IL
Issue Date:
Research Org.:
Argonne National Laboratory (ANL), Argonne, IL
OSTI Identifier:
864990
Patent Number(s):
4447301
Assignee:
United States of America as represented by United States (Washington, DC)
DOE Contract Number:  
W-31109-ENG-38
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
sonic; resonator; control; method; determining; component; concentration; multiple; molten; liquids; teaches; smelting; aluminum; electrolysis; breakdown; alumina; a1; electrolyte; heated; approximately; 950; degree; -1000; provides; accurately; detect; resonant; frequency; preferably; tubular; wall; wavelength; quarter; wave; generator; inputs; signal; range; frequencies; peak; output; detected; oscilloscope; detector; instantaneous; checked; accurate; data; base; correlating; specific; concentrations; normally; experienced; throughout; cycle; controlled; recharged; predetermined; anode; effect; phase; begin; wave resonator; data base; resonant frequency; molten electrolyte; wave generator; resonant frequencies; molten liquid; melting aluminum; multiple component; quarter wave; rate data; accurately detect; /205/73/204/436/702/

Citation Formats

Shen, Sin-Yan. Sonic resonator control and method for determining component concentration in multiple component molten liquids. United States: N. p., 1984. Web.
Shen, Sin-Yan. Sonic resonator control and method for determining component concentration in multiple component molten liquids. United States.
Shen, Sin-Yan. Sun . "Sonic resonator control and method for determining component concentration in multiple component molten liquids". United States. https://www.osti.gov/servlets/purl/864990.
@article{osti_864990,
title = {Sonic resonator control and method for determining component concentration in multiple component molten liquids},
author = {Shen, Sin-Yan},
abstractNote = {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.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1984},
month = {1}
}

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