CN-224212791-U - Steel-copper-aluminum composite cathode conductive structure of aluminum electrolysis cell

Abstract

The application provides a steel-copper-aluminum composite cathode conductive structure of an aluminum electrolysis cell, which comprises a cathode carbon block, a cathode steel conductive piece, a carbon steel connecting piece and a cathode copper conductive piece, wherein a first mounting groove is formed in the cathode carbon block, the cathode steel conductive piece is arranged in the first mounting groove and is electrically connected with the cathode carbon block through the carbon steel connecting piece, a second mounting groove is formed in the cathode steel conductive piece, the cathode copper conductive piece is arranged in the second mounting groove and is electrically connected with the cathode steel conductive piece, the aluminum electrolysis cell further comprises a copper-aluminum connecting piece, the copper-aluminum connecting piece comprises a copper part and an aluminum part which are composited together, the copper part is electrically connected with the copper-aluminum connecting piece, and the aluminum part is used for being electrically connected with a cathode aluminum bus. When the steel-copper-aluminum composite cathode conductive structure of the aluminum electrolytic tank is used, compared with the prior art, the voltage drop of current passing through a copper-steel interface, a cathode conductive steel rod and a steel-aluminum explosion block is omitted, so that the voltage drop of the cathode conductive structure is greatly reduced, and the ineffectiveness consumption is reduced.

Inventors

• LIANG XUEMIN
• LIANG ZHILI
• CAO ZHICHENG
• WEN DA
• BAI YUNFEI
• FENG BING
• ZOU LIANG

Assignees

• 郑州轻冶科技股份有限公司
• 郑州大学

Dates

Publication Date

20260508

Application Date

20240124

Claims (7)

1. 1. The utility model provides an aluminium cell steel copper aluminium composite cathode conductive structure, including cathode carbon piece (1), cathode steel electrically conductive piece (2), carbon steel connecting piece (3) and cathode copper electrically conductive piece (4), first mounting groove has been seted up on cathode carbon piece (1), cathode steel electrically conductive piece (2) set up in first mounting groove and are connected with cathode carbon piece (1) electricity through carbon steel connecting piece (3), second mounting groove has been seted up on cathode steel electrically conductive piece (2), cathode copper electrically conductive piece (4) set up in the second mounting groove and are connected with cathode steel electrically conductive piece (2), a serial communication port, still include copper aluminium connecting piece (5), copper aluminium connecting piece (5) are including compound copper portion (51) and aluminium portion (52) together, copper portion (51) are connected with copper aluminium connecting piece (5) electricity, aluminium portion (52) are used for being connected with cathode aluminium busbar (8) electricity.
2. 2. The steel-copper-aluminum composite cathode conductive structure according to claim 1, wherein the copper-aluminum connecting piece (5) is a copper-aluminum composite board, the copper part (51) is a copper plate, and the aluminum part (52) is an aluminum plate.
3. 3. The steel-copper-aluminum composite cathode conductive structure according to claim 2, wherein at least two copper-aluminum connectors (5) are stacked.
4. 4. A steel-copper-aluminum composite cathode conductive structure according to any one of claims 1-3, characterized in that one end of the aluminum part (52) for being electrically connected with the cathode aluminum busbar (8) is also welded with an aluminum block (6), and the aluminum part (52) is electrically connected with the cathode aluminum busbar (8) through the aluminum block (6).
5. 5. The steel-copper-aluminum composite cathode conductive structure of the aluminum electrolysis cell according to any one of claims 1 to 3, wherein the cathode steel conductive piece (2) is a steel rod, and the cathode copper conductive piece (4) is a copper rod.
6. 6. A steel-copper-aluminum composite cathode conductive structure for an aluminum electrolysis cell according to any one of claims 1 to 3, wherein the carbon steel connecting piece (3) is a tamping paste or a phosphorus pig iron.
7. 7. The aluminum electrolysis cell steel-copper-aluminum composite cathode conductive structure according to any one of claims 1 to 3, wherein a supporting steel plate (9) for supporting the copper-aluminum connecting piece (5) is further arranged at the bottom of the copper-aluminum connecting piece (5), and the supporting steel plate (9) is welded and fixed with the cathode steel conductive piece (2).

Description

Steel-copper-aluminum composite cathode conductive structure of aluminum electrolysis cell Technical Field The application relates to the technical field of aluminum electrolysis cell cathode conductive structures, in particular to a steel-copper-aluminum composite cathode conductive structure of an aluminum electrolysis cell. Background The cell body conductive part of the aluminum electrolysis cell mainly comprises an anode conductive structure and a cathode conductive structure. As shown in fig. 1 and 2, the cathode conductive structure in the prior art comprises a cathode carbon block group, a steel aluminum explosion block 01, a cathode aluminum soft belt 02 and a cathode aluminum bus 03. The cathode carbon block group is one of core components of the prebaked aluminum electrolytic cell, and each main stream electrolytic cell type electrolytic cell contains 20-30 cathode carbon block groups. The cathode carbon block group in the prior art mainly comprises a cathode carbon block 04, a cathode conductive steel rod 05 and phosphorus pig iron 06. The cathode conductive steel rod 05 is combined with the cathode carbon block 04 through the pouring of phosphorus pig iron 06. One end of the cathode conductive steel rod 05 is exposed from the end of the cathode carbon block 04 and welded with a steel block 011 of the steel-aluminum explosion block 01, an aluminum block 012 of the steel-aluminum explosion block 01 is welded with a cathode aluminum soft belt 02, and the cathode aluminum soft belt 02 is electrically connected with a cathode aluminum bus 03. In order to reduce the voltage drop of the cathode conductive structure in the prior art, a section of copper rod 07 is often embedded into a rod core of a cathode conductive steel rod 05 or poured into the rod core by molten copper to form the copper rod 07. The publication also discloses a related art, for example, an invention patent application with the application publication number of CN110093629A and the invention name of an energy-saving composite cathode steel bar for an aluminum electrolysis cell. For another example, liang Xuemin, professor, p.240, p.395, p.m. of modern aluminium electrolysis design and intellectualization, published by the metallurgical industry press. The current flow path of the cathode conductive steel bar 05 with the built-in copper bar 07 during conduction is current, the cathode conductive steel bar 05, a steel-copper interface, the copper bar 07, a copper-steel interface, the cathode conductive steel bar 05, a steel-aluminum explosion block 01, a cathode aluminum soft belt 02 and a cathode aluminum bus 03, and the voltage drop is reduced by utilizing the high conductivity of the copper bar 07, so that the purpose of saving electricity is achieved. However, in the production application, the voltage drop of the current flowing in the links of copper-steel interface, cathode conductive steel rod 05 and steel-aluminum explosion block 01 is up to 20-30 mv, the electricity consumption per ton of aluminum is 60-90 kWh, and the non-effective energy consumption is still high. Therefore, it is desirable to design a cathode conductive structure with a lower voltage drop to reduce the inefficient energy consumption during production. Disclosure of utility model The application provides a steel-copper-aluminum composite cathode conductive structure of an aluminum electrolytic cell, which aims to solve the technical problems of large voltage drop and high inefficacy consumption of the cathode conductive structure in the prior art. The application provides a steel-copper-aluminum composite cathode conductive structure of an aluminum electrolysis cell, which adopts the following technical scheme: The utility model provides an aluminium cell steel copper aluminium composite cathode conductive structure, including the cathode carbon piece, cathode steel electrically conductive piece, carbon steel connecting piece and cathode copper electrically conductive piece, first mounting groove has been seted up on the cathode carbon piece, cathode steel electrically conductive piece sets up in first mounting groove and is connected with the cathode carbon piece electricity through carbon steel connecting piece, second mounting groove has been seted up on the cathode steel electrically conductive piece, cathode copper electrically conductive piece sets up in the second mounting groove and is connected with cathode steel electrically conductive piece electricity, still include copper aluminium connecting piece, copper aluminium connecting piece includes copper portion and the aluminium portion that is in the same place of compounding, copper portion is connected with copper aluminium connecting piece electricity, aluminium portion is used for being connected with cathode aluminium busbar electricity. The technical scheme has the beneficial effects that when the steel-copper-aluminum composite cathode conductive structure of the aluminum electrolysis cell