| 摘要 |
<p>The invention relates to a method for adjusting the time intervals for feeding alumina to electrolytic tanks with punctiform feeding for the production of electrolytic aluminum with a continuous control of alumina concentration variation in the electrolyte. The method recalculates, at cycles of 4 ... 8 h, the quick and slow rates of feeding with alumina in order to maintain an alumina concentration in the electrolyte to values ranging from 1.8 to 2.4 % Al2O3 by a succession of steps, on the basis of its individual parameters, achieved per cycle, by means of following steps of the recalculation of alumina feeding rate; calculating the average values of individual main tank parameters; calculating the time from possible works, technological operations performed during the time calculation cycle of alumina feeding; calculating the theoretical feeding period; calculating the weighted mean for the theoretical feeding period; calculating the quick and slow feeding period; calculating the technical feeding period depending on the number of anode effect tendencies in the feeding cycle. The method allows to reach some optimal conditions of dissolving the dosed alumina and eliminating the technological disturbances due to occurence of undissolved alumina deposit on the tank cathode, while obtaining high technological parameters and also preventing the occurrence of uncontrolled anode effects.</p> |
