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Single-point feeding control method of feeder of aluminum electrolytic cell

An aluminum electrolytic cell and single-point control technology, which is applied in the field of blanking, can solve problems such as control errors, poor control effect of alumina concentration, and frequent effects, so as to improve the control accuracy of blanking and avoid precipitation or frequent effects , The effect of improving the current efficiency

Active Publication Date: 2013-01-02
SHENYANG ALUMINIUM MAGNESIUM INSTITUTE
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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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  • Single-point feeding control method of feeder of aluminum electrolytic cell

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Embodiment Construction

[0011] The present invention will be further described below in conjunction with accompanying drawing.

[0012] As shown in the figure, the single-point control blanking method of the aluminum electrolytic cell feeder of the present invention divides the feed port into different areas, collects equidistant pressure drop signals on the anode guide rods in different areas, and according to the equidistant pressure drop The signal is used to calculate the anode current, and the alumina concentration in each feeding port area is compared with each other according to the change trend of the anode current, and the feeding control is carried out according to the state of each feeding port area.

[0013] When the anode current in a certain blanking area decreases significantly, it means that the alumina concentration in this area is lower than the average alumina concentration of the whole tank; when the anode current in a certain blanking area increases significantly, it means that th...

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Abstract

The invention relates to a single-point feeding control method of a feeder of an aluminum electrolytic cell. The method includes dividing a feeding port into different regions, acquiring equidistant voltage drop signals from anode rods in the different regions, calculating anode current according to the equidistant voltage drop signals, comparing alumina concentrations in each region of the feeding port with one another according to the change trend of the anode current, and carrying out different feeding control in relation to the states of each region of the feeding port. The inventive method can carry out pertinent control on the alumina concentration of each region of the electrolytic cell 7, improves the feeding control accuracy, avoids precipitation or frequent occurrence of effects, and as a result, facilitates stable operation of the electrolytic cell, reduces the energy consumption and improves the 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...

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Application Information

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IPC IPC(8): C25C3/20C25C3/14
CPCC25C3/20C25C3/14
Inventor 杨晓东刘雅峰周东方张钦菘殷小宝邹志勇符勇马恩杰
Owner SHENYANG ALUMINIUM MAGNESIUM INSTITUTE
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