Single-point control feeding method of aluminum electrolytic tank feeder

An aluminum electrolytic cell, single-point control technology, applied in the field of blanking, can solve the problems of control errors, poor control effect of alumina concentration, frequent effects, etc., to improve blanking control accuracy, avoid precipitation or frequent effects , the effect of improving the current efficiency

Active Publication Date: 2015-11-25
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

Method used

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  • Single-point control feeding method of aluminum electrolytic tank feeder

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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

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 ...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25C3/20C25C3/14
CPCC25C3/14C25C3/20
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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