Single-point control feeding method of aluminum electrolytic tank feeder

Abstract

Disclosed is a single-point control based feeding method for a pre-baked anode aluminum reduction cell feeder. A feeding port is divided into different regions. Equidistant voltage drop signals are sampled on anode leaders in different regions. The anode current is calculated according to the equidistant voltage drop signal. The aluminum oxide concentration in regions of the feeding port is compared according to the variation trend of the anode current. Feeding control is performed distinguishingly for states of the regions of the feeding port. Through the method, targeted controlling can be performed on the aluminum oxide concentration in each region of the electrolytic cell, thereby improving the accuracy of the feeding control, avoiding precipitation production or effect frequency, being beneficial to stable running of the electrolytic cell, and achieving the effect of saving energy, reducing consumption and improving current efficiency.

Description

technical field [0001] The invention relates to a feeding method, in particular to a single-point controlled feeding method for a feeder of a prebaked anode aluminum electrolytic cell. Background technique [0002] There is a complex material balance and physical field distribution in the aluminum electrolytic cell, which makes the concentration of alumina in different regions uneven. The traditional method is based on the alumina concentration control method based on tank resistance tracking. The slope of the tank resistance is used as the basis for alumina concentration control, and the single or double number feeder is simultaneously and regularly fed. However, in the electrolytic cell, changes in technological conditions and the existence of some interference factors will cause changes in the corresponding relationship between the cell resistance and the concentration of alumina, resulting in poor control of the concentration of alumina or even control errors, resulting ...

AI Technical Summary

Problems solved by technology

However, in the electrolytic cell, changes in technological conditions and the existence of some interference factors will cause changes in the corresponding relationship between the cell resistance and the concentration of alumina, resulting in poor control of the concentration of alumina or even control errors, resulting in Frequent precipitation or effects will in turn cause the tank condition to become more unstable, forming a vicious circle, which in turn will have a negative impact on the electrolysis process

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