| 摘要 |
<p>The invention relates to a method for regulating an electrolytic cell for the production of aluminium by the reduction of alumina dissolved in a melted cryolite bath. According to the invention, solidified bath talus (15) is formed on the internal walls of the tank (2) and a quantity B, called the talus evolution indicator is determined, which is sensitive to the evolution of said solidified bath talus. Subsequently, at least one of the tank regulation means (such as the anode-metal distance (H)) and/or at least one control operation (such as the addition of AlF3) is modified according to the value obtained for said indicator. The indicator can be determined from electric measurements on the tank and/or from measurements in relation to the liquid metal surface. The inventive method can be used to regulate effectively an electrolytic cell having intensities that can reach up to 500 kA with an electrolytic bath having an AlF3 content greater than 11 % and to reduce noticeably the number of AlF3 content measurements taken for the bath.</p> |
