C - Chemistry – Metallurgy – 25 – C
Patent
C - Chemistry, Metallurgy
25
C
204/48
C25C 7/06 (2006.01) C25C 3/06 (2006.01) C25C 3/20 (2006.01)
Patent
CA 1072042
ABSTRACT OF THE DISCLOSURE A method of accurately determining the height of aluminum to be tapped from a cell having regard to the varying thickness of the lateral edge, the burning away of the anodes, the varying inter- polar distance and the desired metal level. According to this method the difference .DELTA.R between the smoothed cell resistance and the base resistance for each cell is calulated over a period of time. After an interval the level of the anode is adjusted when .DELTA.R exceeds a limiting value to adjust its ohmic resistance and the height of metal to be tapped is calculated by use of a formula which takes into account the difference in vertical levels of the anode beam, the mean direct current and the time between successive tapping operations.
206432
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