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An electroanalytical sensor for monitoring alumina concentration in cryolite-alumina baths

  • Innovations in Aluminum, Part II
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Conclusions

Although the scientific feasibility for this new electroanalytical sensor concept is partially demonstrated by the family of current/voltage curves in Figure 1, considerable further work is needed to demonstrate commercial viability of the concept. Further intensive laboratory investigation, including the following actions is necessary before inplant, proof-of-principle tests can be undertaken.

  • • Conduct parametric studies of indicator-electrode characteristics as a function of electrolyte-composition variables (e.g., cryolite ratio, additives, etc.)

  • • Demonstrate alternate inert anode materials.

  • • Test electrode lifetime/signal repeatability.

  • • Determine roles of electrode geometry and solution-phase mass transfer (i.e., will the stirring effect of rising O2 gas bubbles be sufficient to shield the reaction from other incell convection?).

  • • Determine sensor unit configuration.

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Authors
  1. J. E. Oxley
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  2. R. J. Smialek
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Additional information

J.E. Oxley earned his Ph.D. in physical chemistry at Imperial College, London, in 1961. He is currently president of Oxley Research, Dr. Oxley is also a member of TMS.

R.J. Smialek earned his M.Sc. in chemical engineering at Northwestern University in 1963. He is currently chief engineer at Oxley Research.

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Oxley, J.E., Smialek, R.J. An electroanalytical sensor for monitoring alumina concentration in cryolite-alumina baths. JOM 49, 22–23 (1997). https://doi.org/10.1007/BF02914393

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