Regulation of an electrolytic cell for the production of aluminum involves controlled addition of alumina as a function of the amount of undissolved alumina in the molten bath

摘要

The invention concerns a method for regulating an electrolytic cell designed for aluminium production by fused bath electrolysis enabling accurate and reliable control, in time and optionally in space, of the amount of alumina dissolved in the electrolytic solution (13). The inventive regulating method is characterized in that it comprises: a) controlling the addition of a specific amount Qo of alumina in the solution (13); b) determining the value of an indicator A of the added amount Q of alumina which is rapidly dissolved in the solution (13); c) determining the amount DeltaQ of added alumina which is not rapidly dissolved in the solution (13); d) adjusting at least one setting means and/or one control operation and/or at least an intervention on the cell, on the basis of the value obtained for the amount DeltaQ, so as to maintain it or bring it down to a value lower than a reference value S. In an advantageous embodiment of the invention, the indicator A is determined by analyzing at least one electrical measurement on the cell.