Prebaked anode carbon block structure of aluminum electrolysis cell

Abstract

The invention discloses a prebaked anode carbon block structure of an aluminum electrolysis cell. An anode carbon block is provided with a convex table and a concave groove which can be used for a metal conductive clamp for conductive connection operation and heightening the bottom carbon block for penetration buckling connection, so that a plurality of anode carbon blocks are assembled and heightened on the aluminum electrolysis cell to form an overall anode structure, and continuous production of the aluminum electrolysis cell can be performed without replacement of an anode or anode scrap. Thus the structure has the advantages of replacing the process mode for eliminating the connection and assembly among an anode steel talon, a ferrophosphorus ring and the anode carbon block, reducing the production cost of relative technical processes, improving the utilization ratio of conductive aluminum of the anode carbon block and reducing the electricity consumption for the production of the electrolytic aluminum and the technical cost.

Description

Technical field: [0001] A prebaked anode carbon block structure for an aluminum electrolytic cell is mainly used in the production of a prebaked aluminum electrolytic cell and the preparation of an anode carbon block. technical background: [0002] The current general prebaked aluminum electrolytic cell anode carbon block anode carbon block structure is a rectangular cross-section, the lower bottom surface is flat, and the upper part is trapezoidally connected to the top surface. There are several concave carbon bowls, which are used for casting phosphorus iron rings and anodes. Steel claws are connected. [0003] The current common anode carbon block is used for electrolytic cell production after being connected with anode steel claws with phosphorus iron rings. There are the following main disadvantages in anode assembly and electrolysis production: [0004] One is that the anode assembly process is connected with the anode steel claw by casting the phosphorus iron ring. ...

AI Technical Summary

Problems solved by technology

[0004] One is that the anode assembly process is connected with the anode steel claw by casting the phosphorus iron ring. Not only the process cost of casting the phosphorus iron ring assembly is high, but also the contact voltage drop between iron and carbon is large, and the power consumption is large

[0005] The second is that in the electrolytic cell, the upper part of the assembled anode carbon block should be added with an alumina insulation layer to maintain thermal balance and improve the conductivity of the anode carbon block. Crust cleaning is difficult

Moreover, the phosphorus iron ring of the anode needs to be pressed off so that the anode steel claw can be reused, and the processing cost of the anode carbon block and the anode steel claw before the assembly of the anode carbon block is high

[0006] The third is that the anode needs to be replaced regularly when it is consumed to a certain extent. Replacing the anode residue not only greatly affects the thermal balance of the electrolytic cell, but also makes the utilization rate of the anode carbon block low, which increases the production cost of electrolytic aluminum.

[0007] Fourth, with the replacement of anode anodes, the discharge of electrolyte fluoride salts and gases will not only increase the consumption of electrolyte fluoride salts, but also pollute the environment

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