| 摘要 |
<p>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 interpolar 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.</p> |
