Cathode carbon block and cathode structure of impervious barrier conductive steel rod

Abstract

The invention discloses a cathodic structure of a cathode carbon block and an impermeable layer conductive steel bar, which comprises the cathode carbon block of an electrolytic bath, cathode tamping paste or ferrophosphorus, a conductive steel bar and an impermeable layer, wherein the conductive steel bar is positioned between the cathode carbon block and the impermeable layer; the bottom of the cathode carbon block is provided with a steel bar slot matched with the shape of the conductive steel bar; the cathode tamping paste or pouring ferrophosphorus is tamped in the steel bar slot; the conductive steel bar is provided with a clearance; and the clearance divides part of the conductive steel bar into an upper part and a lower part which are not communicated with each other. The cathodic structure can adjust the current distribution in the upper part and the lower part of the conductive steel bar according to the size, the direction and the length of the clearance and the change of the cross section of the steel bar so as to further adjust the current distribution in the cathode carbon block and an aluminum liquid in the electrolytic bath. The cathodic structure can improve the current distribution in a cathode and the current in the aluminum liquid and improve the stability of the electrolytic bath to further improve the electric energy efficiency and increase the service life of the cathode of the electrolytic bath.

Description

technical field [0001] The invention relates to a cathode structure of an aluminum electrolytic cell, in particular to a cathode carbon block of a large aluminum electrolytic cell and a cathode structure of a conductive steel rod of an anti-seepage layer. The invention belongs to the technical field of cathode steel rods of aluminum electrolyzers. Background technique [0002] In the aluminum electrolytic cell, the cathode carbon block is connected to the cathode steel rod by tamping the cathode tamping paste or pouring ferrophosphorus in the cathode carbon block, and the current of the electrolytic cell is exported through the cathode steel rod. In the prior art, the current distribution in the molten aluminum and in the cathode carbon block is improved by changing the cross-section and size of the cathode steel rod in the cathode carbon block. For example, the patent number of Guiyang Aluminum and Magnesium Design Institute is 200620200276.5, the patent name is the patent...

AI Technical Summary

Problems solved by technology

[0003] Since the above measures limit the change of the cathode steel rod within the range of the cathode carbon block, the tension of the steel rod on the two walls of the concave groove of the cathode carbon block increases at high temperature, which is limited by the height and width of the cathode carbon block, so the cathode The cross-section of the steel rod does not change much, and it is difficult to maximize the current distribution in the aluminum liquid and in the cathode carbon block

Images