Design and Demonstration of an Improved Automated Pot Tapping Method and Equipment

A review of primary aluminium tapping models

“…2. The tapping operation can be broken down in four different steps [22]. Step 1 The tapping tube is placed into the electrolytic cell at the right depth in the metal phase.…”

“…Thus, he concluded that the enlarged wall portion appeared to hinder the aspiration of the electrolyte into the metal. On the other hand, video monitoring of the metal stream inside the crucible had been tested and promised to improve the observation of the flow through the window in the crucible but results were not satisfactory for industrial application [22]. This was because quantitative determination of the bath contamination entrained with the metal were difficult on the basis of one-sided view, and completely obscured view of the metal stream [23].…”

“…This has been proved to be effective in reducing the bath by 50% 1 year after the technology has been integrated at Sohar aluminum [17]. The most promising method to reduce bath carryover was found to be the limitation of mass flow of tapped aluminum, provided that proper operating methods are followed [22]. According to Goutiere and Dupuis [19], an increase of the tapping mass flow rate enhanced the deformation of metal/electrolytic bath interface and as a result bath aspiration increased.…”

“…According to Goutiere and Dupuis [19], an increase of the tapping mass flow rate enhanced the deformation of metal/electrolytic bath interface and as a result bath aspiration increased. However much research had been done about the modeling of the aluminum reduction process [11,22,24,25]. In this review are discussed previous aluminum tapping models and trends in technology developments with the aim of improving the tapping operation.…”