Abstract
In aluminum production process, the control of alumina concentration is very important for the cell steadily running with higher current efficiency. Usually, the identification and control of alumina concentration are achieved by shifts of overfeed periods and underfeed periods. The alumina concentration target is usually controlled as much as possible between a range. In this paper, a number of industrial trials, testing, and data mining analysis reveal some relationships between the alumina concentration and current efficiency, and some relationships between alumina concentration and temperature, as well as some relationships between the alumina concentration and perfluorocarbon (PFC) emissions and anode effects. Then, a method for obtaining an optimal target range of alumina concentration and a new control strategy of alumina feeding is provided to aluminum production process for higher current efficiency and lower emissions as well as lower energy consumption.
Published Version
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