A method for controlling shelling of electrolytic aluminum

Abstract

The invention introduces a shelling control method for electrolytic aluminum. The intelligent control cabinet controls the action of the shelling cylinder according to the received electrolyte voltage feedback signal and exhaust air pressure feedback signal, and the received electrolyte voltage feedback signal is used to control the action of the shelling cylinder. Better than the exhaust air pressure feedback signal, the electrolyte voltage feedback signal is within the normal range, controlled according to the electrolyte voltage feedback signal; the electrolyte voltage feedback signal is within the normal range, controlled according to the exhaust air pressure feedback signal. In this method, when the shelling result is detected to be abnormal, the secondary beating is added to increase the success rate of shelling, reduce the blocking rate, and reduce the inspection intensity; after the cylinder striking hammer touches the electrolyte liquid level, the feedback voltage of the electrolyte liquid level is normal, The intelligent control cabinet immediately ends the shelling action, saving gas consumption, energy saving and emission reduction; construction cost and difficulty are saved, and integrated operation is realized.

Description

Technical field [0001] The invention relates to the technical field of aluminum electrolysis, in particular to a method for controlling electrolytic aluminum shelling. Background technique [0002] The existing aluminum electrolytic cell shelling control mode is to complete the shelling action of the shelling cylinder by controlling the reversing valve under the power provided by the air compressor. [0003] Features and disadvantages of existing control modes: [0004] (1) The stroke of the striking hammer remains unchanged, and each shelling action is full stroke shelling. [0005] (2) The shelling stroke will not be adjusted intelligently with the height of the liquid level. [0006] (3) After the shelling action is completed, it is impossible to return quickly, and the immersion time in the aluminum liquid is too long, which increases the number of gourd heads and reduces the quality of primary aluminum. [0007] (4) High energy consumption. [0008] (5) The sticking of the gourd hea...

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Problems solved by technology

[0006] (3) After the shelling action is completed, it cannot return quickly, and the time of immersion in the aluminum liquid is too long, increasing the number of gourd heads and reducing the quality of the original aluminum

[0007] (4) Large energy consumption

[0008] (5) The sticking of the gourd head on the shelling head leads to poor feeding, material blocking, increasing the shell surface opening, and increasing the heat loss of the electrolytic cell

[0009] (6) A closed-loop system cannot be formed for the shelling signal, and only open and one-way processing can be done for the shelling signal

[0010] (7) The upper part of the aluminum electrolytic cell has a large amount of construction

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