Cathode for dovetail groove type aluminum electrolytic cell

Abstract

The invention relates to an improvement of an aluminum electrolytic cathode set structure, in particular to an improvement of a double-dovetail-groove or multi-dovetail-groove cathode set structure for large grooves, and discloses a cathode for a dovetail groove type aluminum electrolytic cell. The cathode structurally comprises a cathode carbon block and a cathode steel rod which are bonded through combined materials. The cathode is characterized in that the number of the cathode steel rod bonded through the combined materials in the cathode carbon block is one; the distance between the cathode steel rod and the side of the cathode carbon block is 50 mm-180 mm; and the distance between the cathode steel rod and the upper portion of the cathode carbon block is 150 mm-300 mm. Compared with the prior art, the cathode has the beneficial effect of greatly lowering voltage drop of ferric carbon; the limitation for electric conduction increasing through steel rod widening is broken through; quite remarkable functions for lowering furnace bottom voltage drop, lowering the horizontal current and reducing the furnace leakage risk are achieved; and meanwhile, the structure is simple, the manufacturing and running cost is low, and the production cost of electrolytic aluminum can be effectively reduced.

Description

technical field [0001] The invention relates to a cathode for a dovetail groove type aluminum electrolytic cell, which relates to the improvement of the structure of the aluminum electrolytic cathode group, especially for the improvement of the double dovetail groove or multi-dovetail groove cathode group structure of a large-scale cell. Background technique [0002] The aluminum electrolytic cell is the main equipment for aluminum smelting. Electrolytic aluminum is a high energy-consuming industry, and reducing energy consumption is of great significance to electrolytic aluminum. In order to reduce the energy consumption of electrolytic aluminum, it is a very practical and effective measure to reduce the pressure drop of various parts of the electrolytic cell, especially the pressure drop of the cathode. [0003] The cathode of the aluminum electrolytic cell is an important part of the electrolytic cell. It is a cathode assembly composed of cathode carbon blocks, cathode st...

AI Technical Summary

Problems solved by technology

[0004] The cathode of the existing double-dovetail or multi-dovetail tanks of large-scale tanks uses two cathode steel rods, and the use of widened steel rods to increase the conductive area is very limited, so that the conductive area of ​​the cathode steel rods is relatively small, so that the iron-carbon The voltage drop is larger, resulting in a larger voltage drop at the bottom of the furnace, a larger horizontal current, and a larger energy consumption, which is a major problem that plagues enterprises.

Due to the small conductive area of ​​the current cathode steel rod, it is easy to cause the temperature of the cathode steel rod to be too high, damage the cathode carbon block, and even cause leakage of the furnace in severe cases, which brings a lot of inconvenience to production

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