Abstract
The final report, to which this report is an addendum, described results obtained in a physical model of an advanced Hall cell using inert anodes and wettable cathodes. The data were predominantly from measurement of the simulated electrolyte velocities obtained using a laser Doppler velocimeter, and were for three anode designs: a near-vertical grooved anode, a horizontal/near-horizontal grooved anode, and a horizontal/near-horizontal flat anode. This addendum to the final report contains results for an improved near-horizontal anode, together with some results from the other three anodes for comparison purposes. In addition to velocity measurements, the results in this addendum include measurements of mass transfer rates (at the cathode) and interpolar resistance. This investigation was concluded by taking videotapes of the bubbles at the faces of gas-evolving anodes to demonstrate the advantage of the grooved anode designed to facilitate the entry of the gas bubbles into the grooves. 35 figs., 3 tabs.
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