The use of a dynamic aluminum cell model

Abstract

Aluminum Reduction OverviewThis article describes the application of a mathematical dynamic model of an aluminum smelter cell. The model-based programs are used to train personnel. Planned changes in process parameters are fi rst calculated to choose the best practice, and in this paper, the authors give examples of such calculations illustrated by graphs and diagrams. A description is also offered of the application of a model-based cryolite ratio stabilization program, and the economic effectiveness gained through the program is shown.

Electrolyte temperature based control method for aluminum fluoride addition in Hall-Héroult cell

“…At the same time, Fig. [ 4,5] present the comparisons of the cryolite ratios of cell 1# and cell 2# in the three test steps, respectively. It is seen that the variations of both electrolyte temperatures and cryolite ratios in the third test step are smaller than those in the first and second test steps regardless of the cell.…”

“…Tab. [1][2][3][4] list the mean measurement results in a day. From these results it is seen that the AlF 3 addition has a complicated effect on the electrolyte temperature and the excess AlF 3 content, even if the preceding AlF 3 additions have been close to the average consumption of the cell.…”

“…For example, if cell voltage increases then electrolyte temperature will also increase and so will the cryolite ratio. In response, the aluminum fluoride addition will have to be increased, but the effect of the increased aluminum fluoride addition on the voltage variations may be observed after about one week [4]. The primary two factors for accurate prediction of the aluminum fluoride addition are cell heat/mass balance and cryolite ratio time lag.…”

Spatial temperature profiles in an aluminum reduction cell under different anode current distributions

“…Various models have been developed to estimate thermal balances of reduction cells . These models rely on conventional measurements of cell voltage V cell , and line current as primary model inputs to calculate the total energy input across the entire cell.…”

Mathematical modeling of the electrolytic obtaining of aluminum to solve technology-control problems

“…It was introduced and successfully used at plants of the RUSAL aluminum company. This allowed us to improve the quality of control and save raw materials [3,4].…”