Electric tank cathode structure with conductive plate

Abstract

The invention discloses a reduction cell cathode structure with a current-conducting steel plate and belongs to the technical field of aluminum electrolysis. The reduction cell cathode structure comprises a cathode carbon block, a cathode collector steel bar, a current-conducting steel plate and an impervious layer. The cathode collector steel bar is positioned in the cathode carbon block. A bottom part of the cathode carbon block is proved with a steel bar groove in a shape fitted with that of the cathode collector steel bar. The cathode carbon block is connected with the cathode collector steel bar through the steel bar groove. The current-conducting steel plate is positioned at a lower part of the cathode carbon block and in the impervious layer. The current-conducting plate is connected with the cathode collector steel bar into a whole to conduct a cathode current. The reduction cell cathode structure reduces horizontal current intensity in aluminum liquid, improves electric energy efficiency and improves the stability and service life of a reduction cell due to the cathode collector steel bar and the current-conducting plate.

Description

technical field [0001] The invention relates to the technical field of aluminum electrolysis, in particular to a cathode structure of an electrolytic cell with a conductive plate. Background technique [0002] In the aluminum electrolytic cell, the cathode conductive steel rod inside the cathode carbon block is connected with the cathode carbon block through the cathode tamping paste, and the current of the electrolytic cell is exported through the cathode conductive steel rod. In the prior art, the current distribution in the aluminum liquid and the cathode carbon block is mainly improved by changing the cross-sectional size of the cathode conductive steel rod. The specific embodiment is to design the middle of the cathode conductive steel rod as a large cross-section section, and design the two ends of the cathode conductive steel rod as small cross-section sections, and between the large cross-section section and the small cross-section section, a slope-type variable cros...

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Problems solved by technology

However, the change range of the cross-sectional size of the cathode conductive steel rod cannot exceed the internal range of the cathode carbon block. Considering that the tension of the cathode conductive steel rod on the two walls of the concave groove of the cathode carbon block at high temperature will increase, due to the influence of the cathode carbon block Due to the limitation of height and width, the change range of the cross-sectional size of the cathode conductive steel rod is not large, so it is difficult to improve the current distribution in the aluminum liquid and the cathode carbon block to the greatest extent.

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