Combination structure of cathode carbon block and cathode steel rod of aluminum electrolytic cell

Abstract

The invention belongs to the technical field of aluminium electrolysis and specifically relates to a cathode carbon block and cathode steel bar combined structure of an aluminium electrolytic bath. The technical scheme provided by the invention comprises a cathode carbon block and a cathode steel bar. The bottom of the cathode carbon block is provided with a steel bar groove. The cathode carbon block and cathode steel bar combined structure is characterized in that part of the cathode steel bar along the length direction is positioned inside the steel bar groove and part of the cathode steel bar extends out from the steel bar groove, wherein the part of the cathode steel bar inside the steel bar groove is 30-200mm higher than the part which extends out from the steel bar groove; especially, grooves of 1-5mm depth are also processed on the bottom surface and side surfaces of the steel bar groove; and grooves are processed in the length direction of the cathode steel bar on the top and side surfaces of the cathode steel bar inside the steel bar groove. According to the technical scheme, voltage drop of the cathode steel bar is reduced, electrolytic bath heat loss caused by increasing of cross section of the cathode steel bar is not increased, contact area between the cathode steel bar and cathode carbon paste and contact area between the surface of the cathode steel bar groove and the carbon paste are increased, and contact voltage drop is effectively decreased.

Description

technical field [0001] The invention belongs to the technical field of aluminum electrolysis, and in particular relates to a combined structure of a cathode carbon block and a cathode steel rod of an aluminum electrolysis cell. Background technique [0002] At present, the power saving problem of industrial aluminum electrolysis is still the most important research topic in aluminum electrolysis production. The power saving of the industrial aluminum electrolytic cell is realized in two ways: one is to realize the power saving of the industrial aluminum electrolytic cell by increasing the current efficiency of the aluminum electrolytic cell, and the other is to realize the power saving of the industrial aluminum electrolytic cell by reducing the average voltage of the aluminum electrolytic cell Electricity savings in aluminum electrolysis production. In the current industrial aluminum electrolysis, when the cell voltage is 4.0 volts, every time the current efficiency increa...

AI Technical Summary

Problems solved by technology

[0007] Aiming at the problems existing in the prior art, the present invention provides a combined structure of cathode carbon block and cathode steel rod of an aluminum electrolytic cell, aiming to solve the problem of excessively high cathode voltage drop in the current industrial aluminum electrolytic cell cathode steel rod groove. problems, effectively further reducing the cathode voltage drop of industrial aluminum electrolytic cells

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